The Six Meter Moxon Antenna 1. ZL Specials and HB9CVs also leave quartering rear lobes that are often 3 The Six Meter Moxon Antenna Designed by Les Moxon, G6XN (now SK) 4 The Six Meter Moxon Antenna Forward Gain 5.5 ~ 6.0 dbi Front to Back Ratio ~ 25 db The forward gain is down from a InnovAntennas provide Complete EME Antenna Systems including everything you need to be you active. G6XN used a rectangle composed of two equal lengths of wire. . (03/07/2009), YU1QT'S Surface Area: here Indoor FM Moxon Antennaclick Followers of this blog will note that I replaced the Stressed Moxon with the Innovantennas 3-element Yagi in April 2015.. Then in July 2016, I replaced the Cheap Yagis and the 3-element LFA. Instead, they occur 15 to 20 degrees further back. 40 Meter Mini-MOXON Beam Antenna Designed, built, and presented by: Al Koblinski W7XA. (05/25/2009), N7OU'S The best place to start is at the beginning, so visit the Construction section. while the front-to-back ratio is still around 20 dB near the band here Moxon Rectangles," Communications Quarterly (Spring, 1995), 55-70, "Moxon Rectangles for 40-10 Meters," QRPp (December, 1995), 25-27. This beam is a 2-Element-Yagi with radiator and reflector and reduced size to about 75% of a normal beam. match. If you have questions, the QRZ antenna forums are a valuable first resourceor send our webmaster an email. The Moxon antenna is designed and manufactured by BETAFPV for the 2.4G/915MHz/868MHz TX module. here After you build one (try building a small one for 6 or 2 meters) and you'll agree that based on gain and F:B, the Moxon Rectangle is a superb antenna that is fun to build, works like a champ and is virtually indestructible. The forward gain improves with added height, but not by a major amount. C: 103.7mm. Moxon antenna gain is about 3dB higher than dipole antenna. for CW/SSB operation, or vertically for FM operation. Moxon. The moxon rectangle is a small compact 2 element yagi antenna with folded back elements.The picture above shows a 17 mtr version made from fishing pole whips. 20/15/10 Meter Single Feed Moxonclick magnitude and phasing on the reflector element that is superior to that Aug 17, 2018, 04:10 AM. Weighs just 8 lbs., yet delivers an amazingly clean cardioid pattern with 3.3 dBi forward gain and 30 dB of interference killing front-to-back rejection! Click picture for ordering and additional The SE-6MB can be mounted horizontally . If you use tapered Software for Apple Computersclick The Moxon antenna or Moxon Rectangle is a simple and mechanically robust two-element parasitic array, single-frequency antenna. Dimensions are for 6 gauge wire or 1/2" copper pipe. The weight of the feed line tends to keep the entire structure horizontal when pulled from the center. In this video I show how I made a 20 meter Moxon Antenna for portable operation like POTA or SOTA. For the aluminum 20-meter Moxon, the length (A) is 25' and the overall A Moxon antenna may be deployed either horizontally or vertically. Bandwidth: 7% (VSWR < 2). As with the Yagi . all units in inches + 1/128 inches (unless noted). Feedpoint is an SO-239 pigtail. here The Moxon rectangle is a 2-element parasitical beam or unidirectional I prefer to use a rope as an 'armstrong rotor' for mine. [1] Moxon antenna for the 20-meter band. dimensions instead of electrically tuning them. side wires or tails, tends to suppress those rear lobes, resulting in a maintains quite usable forward gain and front-to-back ratio, although elements to allow him to nest several bands' worth of rectangles. [3] Because the placement and size of the parasitic reflector both depend highly on wavelength, each Moxon antenna functions properly on only one frequency. These significant improvements are noted The gain of a real antenna can be as high as 40-50 dB for very large dish antennas (although this is rare). 6061-T6 aluminum, UV resistant PVC, and stainless steel hardware. 2 Meter Moxon Beam antennais field tunable tocover 144 to 148 Mc. The optimized Frequency or Freq. SE-6MB can accommodate masts up to 1-3/4" OD, andis available an optional 1:1 Maxwell ferrite choke balun with UHF connector. If we compare the gain for a single antenna with the maximum gain from the stack, we arrive at stack improvements of 3.33 and 3.64 dB, respectively for the lower and the higher stack. 58 ohms at the design frequencies, a close match to the standard amateur Mount anywhere using lightweight TV antenna hardware. Vertical Moxon Array for Portable (VMAP)click meaning that the maximum front-to-side ratio points do not occur at 90 degrees from the maximum forward gain direction. SO-239 pigtail feedpoint. It is basically a 2-element parasitic beam with the tips of the elements folded towards each other to form a rectangle about 30% smaller that the equivalent beam. 17 Meter Moxonclick At the same time, the the Moxon rectangle. It is a two element Yagi-Uda antenna with folded dipole elements, and with no director(s). Elements are constructed The Moxon antenna is a fairly simple and sturdy two element parasitic array that can deliver approximately 5 dBi gain over a dipole antenna. A: 275.7mm. The Moxon antenna, developed by Les Moxon G6XN, is a derivative of the VK2ABQ square antenna developed by Fred Caton. other medium without permission of the author. evidenced by the large number of Moxon variants sent into the Project website over the years. would easily cover the band. see "Two-Element 40-Meter Switched Beam," by Carroll Allen, AA2NN, in The rectangle, however, far exceeds other This Moxon antenna can satisfy your dream of a long distance. Click here. The forward gain of a Hex-beam is typically 1.8-2dB less than that of a full . The up lobe is very good, with a side lobe pointed at the horizon, where higher gain is needed anyway. the plots show a forward gain of around 3.8 dBd and 17 db F/B. Sep 9, 2016. The stock SB6 is a 2 element directional . Nevertheless, it is a reasonably acceptable compromise when space is at a premium and a mechanically robust multi-band antenna is desired. D: 29.8mm. Moxon Modeling:4NEC2 Optimizer Functionsclick The pattern group at 35' up (1/2 wl) in Figure 6 shows that the antenna same results and feedpoint impedances. For an overview of this antenna see the Cebik article The Moxon Rectangle: A Review. revealed in Figure 8. Moxon Rectangle Generator. Les Moxon, G6XN, whose book HF Antennas for All Locations is now in its The goal of this website is to share the experiences of MOXON antenna builders everywhere. This yields a beam not much different than the size SE1720M Moxon antenna for 17 or 20 Meter operation. 20 Meter Portable Vertical Moxonclick information. Moxon Antennas SE-2MC Moxon 2 Meter Moxon Beam antenna is field tunable to cover 144 to 148 Mc. 5 ELEMENT 6 METER MOXON "SUMMERTIME SPECIAL" click here I decided to finally put together a Moxon for 11 meters. Hard part to find for both antenans is the spacer between the elements. The orientation of the antenna determines its polarization. here The PVC pipe provides support for the feed line so it will not pull directly on the antenna wires. (07/03/2011), SM0DTK'S The Moxon antenna is named for its creator, the late Les Moxon (G6XN). squares. No two Moxonsantennas are alike! MFJ 6-Meter Moxon Antenna MFJ s 6-Meter Moxon for limited space features low SWR and a broad cardioid pattern with 5.5-dBi forward gain, high front-to-back ratio. "The Moxon Antenna is a simple two element parasitic array antenna that is popular with Amateur Radio enthusiasts for its simplicity of construction. The SE-10MB can be mounted horizontally for CW/SSB operation, or vertically for FM operation. For their size they're high performance antennas that lend themselves well to the spirit of experimentation as (09/14/2014), GW4MBN'S The antenna can be constructed with copper or aluminum tubing or electrical wires with spreaders made of wood, old fishing rods, or PVC pipes. here (6/29/2008), YU1QT'S I put up Diamond antennas for working satellites and returned the Stressed Moxon to the pushup mast.Works great and actually fits better in my side yard with minimal windload. aluminum Moxon rectangle that we shall describe later on. All of the antennas exhibit feedpoint impedances between about 56 and consistent for all the models, averaging 5.8 dBi and greater than Performance is what counts! (11/30/2014), KK4OBI 4. The balance of the antenna is made with 6061-T6 aluminum, UV resistant The Moxon with a 67 deg. Cebik (W4RNL) made detailed comparisons and calculations of several different versions of Moxon antennas. . Comes with a choice of a UHF Female or Type-N Female he tuned each wire remotely from the shack, thus giving himself a fixed so wide that it is nearly cardioidal. Stacked Moxons for 40 & 15 metersclick I had to try one. Portable Moxon rectangles are favored by radio amateurs for field day and for emergency communications use, because of their lightweight and robust construction. The Moxon antenna is popular with amateur radio enthusiasts for its simplicity of construction. This tack, shown in Want to include your MOXON on this website? The program is based on an algorithm developed by L. B. Cebik, W4RNL. The Moxon antenna is a directional antenna with a high gain of 5.5dbi to the. 3 Band Contest Moxon for 10-15 & 20 Metersclick Such antennas can be built with little wind load and minimal weight. The These guides assume that the antenna has been Building the Vertical Moxon. the elements and the end coupling of the wires produces a current Update from 17-July-2016. This combination of properties is prized by those who adhere to At 70' up (1 wl), the antenna shows a still different rear aspect, as The Moxon is a two element beam antenna. this pattern without the use of a phasing line. Or, you can try various fittings (07/03/2011), Moxgen The principle also has application to 3-element design. Data band and the 222 Mc. Yea I know SOTA might be a stretch for most of us! providing coverage of CAP and MURS frequencies also Constructed of 1/2" and 3/8" hard drawn 6063-T832 aluminum tubing, 6061-T6 aluminum, UV resistant PVC, and stainless steel hardware. Stack two with a phasing harness (11/27/04), MOXON message board archives available here. 20meter Moxon Beam that covers14 to14.350 Mc. It also has almost equal gain to the Yagi. First, a rectangular shape would improve gain. Adjusting the reflector tail Eventually we will post details of that, but several of the parts were manufactured (makerbot, machine shop). It is important to keep the Moxon antenna pointed in the general direction of your aircraft. MoxGen will show you the dimensions and (optionally) generate an antenna model file for a 50 ohm Moxon Rectangle antenna, given the design frequency and wire size. 40/30 Dual Band Moxonclick DL2GMS' does what it does so well. corner section of the next size larger or smaller tubing than the 1" Also look into some heavier duty fiberglass supports for the spreaders. The next step in our progression is to stack 2 Moxons, with the lower antenna at 2 wavelengths above ground. cost of reduced forward gain (and vice versa). The design is rectangular, with roughly half the rectangle being the driven element and the other half being the reflector. I tend to use light-weight CPVC sections Now, my back garden in Wales in the winter is permenantly waterlogged, so I modeled it using very wet farmland type ground, with the bottom of the antenna at its actual height above ground of 80cm. Constructed of 1/2" and 3/8" hard drawn 6063-T832 aluminum tubing, 6061-T6 aluminum, UV resistant PVC, and stainless steel The tubing I used is 5/32" OD with a .032 wall thickness and fits perfectly over the 10 gauge copper . Note that when measuring the 70cm elements, include the wire diameter(!) Building a Vertical Moxon presents some challenges. Images. Specifications. over 4.8million site hits over the last 12 months!!! The Moxon antenna design is rectangular, with slightly less than half of the rectangle being the driven element (radiator) and the other part (slightly more than half) being the reflector. EndFed Vertical 10m Moxonclick The one critical factor is keeping the element ends in a fixed position The Moxon's geometry, which includes the sandwich wires between two sheets of laxan, melt to fit? We invite you to click on the various links to learn more about the project. The Moxon looks as wideband as a full Yagi with a 1.5:1 SWR bandwidth of more than 600KHz and 2:1 SWR of over 1MHz, while the Spiderbeam shows SWR below 1.5:1 in an over 400KHz bandwidth and 2:1 in an over 700KHz bandwidth. something else, the design is well worth considering if you want a 12 dB as typical of a full size 2-element Yagi). rectangle, see "The Moxon Rectangle," by Morrison Hoyle, VK3BCY, in Radio full size 2-element Yagi only by about 0.2 dB. James Palmer, W7JMP (10/26/2009), EA2BD'S overall impedance. on corners in the element length, and measure to at least the nearest half mm. They're my favorite antenna for Field Day and a great antenna to build for summertime 6 meter band openings. also contains an expended treatment of the all-aluminum 10-meter Moxon 2-element beams in front-to-back ratio, while almost equalling them in The designs here are for flimsy light weight moxons designed to be carried around or used inside. here TV rotor. View all Images in thread. The SE-10MB comes with a UHF connector. 70 cm moxon made from 6 gauge wire The Moxon antenna (invented by Les Moxon (SK 2004), G6XN) is sort of a two element yagi with the elements folded and spaced to eliminate the need for an impedance match. the rear patterns do not quite match the free space nulls. You may need to hold you key while clicking. The spacing between tail ends (C) is 0.8'. Stack two foradditional (up to +3 dB) forward gain. W7JMP site here For their size they're high performance antennas that lend themselves well to the spirit of experimentation as evidenced by the large number of Moxon variants sent into the Project website over the years. Specifications Electrical: Frequency: Forward Gain: Front-to-Back: Maximum VSWR: Power Limit: Impedance: Polarization: Mechanical: Boom Length: Assembled Weight: Mounting Clamp: SQ. The spacing (C) has Basic Moxon 2-Meter Properties. (01/28/2012), SM0DTK'S The 2-Element-Yagi with reflector has normally a 0,2-lambda-boom and an impedance of 50 W. The Moxon-beam has a 0,18-lambda-boom This is a good impedance for wire- beams. additional information. horizontal antennas have additional ground gain, much more than verticals do. I use a 10m moxon, which when vertically polarized is about 6ft wide.It's probably 80% the height of a similar yagi. In the SWR impedance. The driver tail (B) is 3.5' long, while the reflector tail (D) is 4.7' Moxon antenna that covers the 219 Mc. 200KHz @ <2:1 SWR) Light weight Easy construction and tuning 40-meter "V-Yagi, " (superficially resembling an older G4ZU design) by My own work, aided considerably by the emergence of modeling software, a list of dimensions, using Figure 5 as a guide. Specification Moxon Antenna Coaxial cable length: 49mm(2.4G)/72mm(915M/868M) Connector: SMA Ma of many phased arrays in terms of effecting a rear null. Perhaps the best thing about the antenna is the price. design has much to offer. Dimensions 4,5 * 4,05 meter, weight about 3,0kg, gain 9,3 dBi. Gain: 6.3 dBi. The drawing shows the system of construction. 73, James, W7JMP and Moxon Antenna Project Participants everywhere! The Moxon antennas also known as Moxon Rectangles are two elements beam antennas, based on a simple design, similar to Yagi antennas, but with bent elements and without the director. All the talk on the forum of Moxon antennas was too much. This Moxon antenna variant resonates at 145 MHz. 6 gauge copper wire was selected here, as it gives good enough structural support that almost no other supports are necessary. The combination of parasitical coupling from the parallel portions of front lobe, a good front-to-back ratio and a useful amount of forward gain and presents a decent near 50 ohm match at resonance. The balance of the antenna is made with 6061-T6 aluminum, UV resistant PVC, and stainless steel hardware. Duty construction means the SE-20M Moxon can hold its shape without the need for suspension kits/hangers. Wishlist. This is a balanced antenna; a balun would help a lot, but is less necessary if the feedline is a multiple of a quarter wave long. The Moxon antenna is a monoband directional antenna with a wide lobe in the front giving a 2.0dB gain and the null on the back. The advertised forward gain for this antenna is 3.3 dBi and the . You can bend compact beam about 0.35 wl long by 0.13 wl wide with a direct coax driven element, effecting some degree of end coupling while retaining (10/19/2009), EP3PK'S Stack two with a phasing harness to gain+3dB of additional gain. The advertised forward gain for this antenna is 3.3 dBi and the front to back rejection is listed as 30dB. After you spend some time looking at the "What's New" shown below, or browsing through the "Participant" section, you'll see what we mean. 17 meter band. lexan plate to support wires and coax connector, bend wires through holes in lexan and melt in place, (70cm) lexan plate across feedpoint and reflector, feed coax through and secure near middle of reflector. Invented by Les Moxon, G6XN, the MOXON is a stealthy gain antenna that's inexpensive and fun to build. Tubing models tend to show Derek shows us several examples of this versatile antenna which can be built for the HF/VHF/UHF Amateur/Ham Radio bands. Moxons on Pacific Beachesclick part C of Figure 1, led in turn to an understanding of why the antenna The diagram shows the basic layout. The SE-10MB is light enough to be turned with an inexpensive He also developed a detuning addition to the In this situation, the beam would need to be fed using ladderline and a tuner would be required. Design goals Some forward gain Good directivity (high F/B and F/S ratios) Relatively small size Good Bandwidth (min. ), W7JMP's 4-bander Moxon Mania! However, a wire model for 20 meters directional antenna. shows the combined patterns for 14.05, 14.175, and 14.3 MHz for the L.B. depart significantly from the free space curve shown in Figure 4. Note that wire diameter is critical. Although I have published some numbers for wire Moxons before, here is The physical dimensions certainly are, but how the elements are constructed and suspended varies substantially. at 1.5:1 or less VSWR. diameter elements or change the element diameters altogether, you The SE-10MB Moxon is field adjustable anywhere from 26 to 35 Mc. At all three heights, the SWR curve does not This design is based on L. B. Cebik, W4RNL's Moxon model (see calculator at the end of the linked page). Contact me if you are interested in this, and it'll motivate me into working on writing up the plans anyway. 23-25. The SE-6MB Moxon Lite is field adjustable anywhere from50 to54 Mc.. . Covers 135 Mc.to 155 Mc. Alternatives are still being explored for spacers and feedpoint attachment. Product Manuals. UV resistant PVC, and stainless steel hardware. Invented by Les Moxon, G6XN, the MOXON is a stealthy gain antenna that's inexpensive and fun to build. (03/25/2009), TC3EC The antenna is in layout similar to the well known VK2ABQ-Square. (1 August 2021). (04/22/2011), 2E0RHM'S most of the other email links to me on this site don't work..use simple position holders. Moxon 5 element: Compared to the Moxon 4 element this antenna has one element extra between the two moxon's. It has a good F/B, bandwidth and gain. (Remember velocity factor!). here spacing between tail ends than the tubing models to achieve roughly the [1] It takes its name from the amateur radio operator and antenna handbook author Les Moxon [2] ( call sign G6XN). Specification Type: MOXON Directional Antenna Antenna polarization: vertical/horizontal polarization Frequency: 2.4GHz Gain:. parasitic characteristics. Equipped with either a UHF Female connector standard, or an optional Type-N female connector. Try to make the corners as square as possible. B: 746.2mm. MOXON Antenna Project website authoring responsibilities transferred from Don "K4QKY" to Steve "K6SGH" effective 11/27/04. [/FONT] A [FONT=&quot] carefully optimized and constructed Moxon antenna exceeds gain and bandwidth of sloppily designed/constructed yagi antennas. EZNEC Modeling indicated approximately 6 dBi gain at around 10 degrees TOA. However, Clickpicture For example, the front-to-back ratio is above 9dB on the 10-meter band. Stack two with a phasing harness to gain an additional(up to+3 dB) forward gain. A carefully optimized and constructed moxon can easily exceed the gain and bandwidth of a sloppily designed and constructed yagi. 13436. Averaging 4.8million hits per year, since 2003 it's all about Hams Helping Hams, the underlying theme of the MOXON Antenna Project. The ARRL Antenna Compendium, Volume 6, pp. rectangle, but with the higher gain associated with three elements. Support poles can't be metal or they will . Also, the moxon is smaller than the typical yagi and much smaller than the typical J-pole antenna. to 225 Mc. (07/20/2009), YU1QT'S And they're great for portable field operating as well. In this orientation, it views a stripe of the sky, which can be aligned with the orbit of the target satelite. If you make this antenna for home use, I would beef up the base plate and use a heavier gauge wire 18 -12awg. This antenna can be Bandwidth: 2.4 GHz; Gain: 5.98 dBic; Connection . (01/09/2010), IK2CLB'S However, adjusting the driver tail (B) has the most The SE-10MB can also be adjusted to operate 32 dB in free space, respectively. 2 meter moxonclick 2 Meter UN Repeater Moxonclick This page was last edited on 5 October 2019, at 18:28. second edition, made two very significant discoveries about the Caton . Check out all our RC Transmitters and our entire RadioMaster selection! here (10/26/2009), DL7AOS' Second, the With some care, this can be hung from the ceiling on a piece of string using a thumbtack or a paperclip. I would definitly go for a higher placed moxon. The moxon works very well for a compact footprint antenna, I have found that the feed point impedance and F/B ratio . The wire dimensions use slightly longer tails and slightly closer Sadly it's out of production now, but it's easy enough to create your own. here [5], "Moxon calculator for Microsoft Windows: Moxon rectangle generator", https://en.wikipedia.org/w/index.php?title=Moxon_antenna&oldid=1126184705, Articles with unsourced statements from August 2022, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 8 December 2022, at 00:27. We are also working out the details of a copper pipe version of this. Whether you call the antenna a VK2ABQ square, a Moxon rectangle or here or less. The Moxon ready to go up. Forward gain in free space (dBi): 6.1. Modified Vertical Moxon Gain Pattern / 2db Forward Increase . Click picture for ordering and additional information. Easy to build two element antenna! width (E) is 9'. relative to each other. Elevation Plot on 20m Moxon 6 element: This antenna has a good F/B, bandwidth and gain. To those ends, I developed the antenna as a Excellent gain and Front to Back Ratio. [citation needed]. The ideas below are for a 6 gauge wire moxon (70cm or 2m) although the picture on the right shows a 1/2" copper pipe moxon. Not only does the pattern hold up well, so too does the feedpoint For tubing models, the Moxon corners can be a challenge. Although this is a directional high gain antenna, it has a very large aperture (about 100 degrees) with a high front to back ratio. August 2021: Under NEW Management! . I ran out of time today to tune it up a bit more, but I did get it together and in the air. designed for other purposes, such as electrical conduit corners and the (07/20/2009), KJ4IVD's 27MHz Moxon rectangle With shipment Small antenna shipping within UK for 9.95 With shipment Small Antenna Shipping to Europe for 39.95 279.95 Total without tax: 233.29 Ask a question about this product InnovAntennas Description A Moxon Rectangle (Yagi) for 27MHz or 28MHz - This antenna can be set for use on either band or 500KHz of each! The same volume 20 meter 2 element beam Moxon (14 MHz). uni-directional beam, allowing the elements to have their own native Insulating Guying provided elements (longevity more than 25 years): see pictures. Dimensions for the 1/2" pipe are already adjusted for pipe diameter. Reversible Vertical 20m Moxonclick even the largest coat button. It is worth doing a dry run to make sure all measurements meet above figures before gluing and you may find the . (70cm) feed at right angle to plane of antenna to minimize distortion? I will not be able to confirm the fabled back door . The Moxon rectangle is a 2-element parasitical beam or unidirectional antenna about 70% the length of a full size 2-element Yagi of standard driver-reflector design. The wire director and reflector angle back toward the p.s. the link shown here. has been devoted to refining and understanding the characteristics of the greatest affect upon the place of the deepest null within the ham immediate affect on feedpoint reactance. (11/07/2009), KH6CB'S You can use a small rotor to turn the antenna or fix it in a static direction. 50-ohm coaxial cable. Constructed of 7/8", 3/4",5/8" and 1/2" hard drawn 6063-T832 aluminum tubing, 6061-T6 aluminum tubing, At 55' up (about 3/4 wl on 20 meters), Figure 7 shows that the rear Click picture for ordering and For use on shortwave-bands spreaders are commonly made of bamboo or glass-fiber reinforced plastics, carrying a radiator and reflector made from wire. E: 142.2mm. of 5/8" & 1/2" hard drawn 6063-T832 aluminum tubing. The Moxon antenna is highly directive as compared to the dipole antenna. It's a great Saturday antenna project especially for new DX'rs seeking their first gain antenna. The Moxon achieves Spacing between elements (dimension C) is very critical. which is a natural for the rectangle--and Figure 4 shows the 50-Ohm SWR Antennas for all Locations"(RSGB- Publications, Great Britain 1993). . the driven element, essentially a dipole, forms one side and the reflector forms another. The SE-6MB Moxon antenna is a lighter weight versionMoxon designed for rooftop installations, or anywhere a light weight beam at 1.5:1 or less VSWR. in part B of Figure 1. 3 Band Field Day Moxon Arrayclick I've used the SOTABeams SB6 Moxon antenna for a number of years now, it's a great compact antenna that performs remarkably for its size. 3 ELEMENT Stacked Moxons for 20, 15 & 10 metersclick It s winter-storm tough but extremely lightweight, under 5 lbs. slightly (operationally insignificantly) higher gains (about 0.15 dB), A version of this item first Comes with a UHF female connector, or it can be fitted with a Type-N connector. Although the most suppressed rearward pattern is frequency specific, (05/11/2009), DL7AOS' 2010 - 2022 - SAL Electronics, LLC, Algonquin, IL 60102. here here Views: 88. to 220 Mc. information. Moxon Antennas. long. inserted into each aluminum tubing end, with sheet metal screws as Also shown in Table 1, are results for the other HF bands above 20M. On HF these properties allow a small, lightweight beam to be erected with excellent . example at hand. Nathan Miller, NW3Z, and Jim Breakall, WA3FET, in QST for May, 1998, on the 11 Meter band. (12/2/04), MOXON Antenna Project gets NEW MESSAGEBOARD. 10 Meter Moxon build notes by M0MRRclick here (12/6/04), KG4JJH'S Dual Band MoxonAllen does it again! in 2003, Webmaster: Step 2: Design. The 2850MOX Dualband antenna requires only one feed line. The driven element and feedpoint is the front of the antenna, so tie the rope on the back and use the feedpoint to 'aim' the antenna in the direction you want to transmit. SE-20M Moxon Horizontally Mounted UV resistant PVC element mounting plate with UV resistant tubing clamps 2" 6061-T6 square aluminum boom. Views: 111. The result is a beam with a very broad beamwidth and a very high front-to-back ratio, with a gain similar to that of a standard 2-element Yagi. The Moxon antenna is a directional antenna with a high gain of 5.5dbi to the front. Figure 5 shows the operative dimensional parts of any Moxon rectangle. Interestingly, the Moxon beam shows gain over a dipole (=2dbi) and a small F/B even on these higher frequencies. materials--is straightforward. The Vertical Moxon can also be modified to produce a pattern resembling a Dipole. hardware. Product Details. This site is dedicated to the memory of KD6WD, John Labutski, SK, our Moxon Elmer who founded the MoxonAntennaProject order of the day. size used in the 20-meter model. For each base height, I have listed the corresponding properties of a single Moxon rectangle. The club recently built a 6m version of the moxon out of wire. Link to Moxon Project News. here Moxon antenna for the 2-meter band. Now we can build the antenna and have a good chance of it working! here edges. has an azimuth pattern quite similar to those shown for the Moxon If pointed directly up, this can make a decent sattelite antenna. Tuning up a Moxon rectangle--or adjusting the dimensions for other here here driver-reflector design. band of choice. here Data may be used for personal purposes, but may not be reproduced for publication in print or any A more durable (or larger) moxon might use pipe instead, or PVC as a support for 12 gauge wire, as depicted on Cebik's page above. (02/08/2009), YU1QT'S design frequency, the antenna provides a forward lobe with a beamwidth at 1.5:1 or less VSWR. It's a great Saturday antenna project especially for new hams seeking their first gain antenna. operation, and that spacing had to be greater than that provided by 2m moxon using 6 gauge wire and PVC supports. down by well under 20 dB. A collection of seven projects of Moxon Antennas for Ham Radio HF Bands. PVC and stainless steel hardware. appeared in AntenneX, Oct., 1998. !click here (12/19/04). Elements are constructed of 5/8" and 1/2" hard drawn 6063-T832 aluminum The Moxon directional antenna is intended for long-range and has a more narrow field of operation. The rectangle, however, far exceeds other 2-element beams in front-to-back ratio, while almost equalling them in gain. Sep 26, 2012 #1. (6/23/2008), SM0DTK'S 20 Meter Corner Fed Vertical Moxonclick here (1/29/2008), M1PAF'S 20 Meter Vertical Moxonclick here (01/04/2008), N1RK'S 6 Meter Moxonclick here (12/4/2007), YU1QT'S 5 element 20 Meter Super Moxonclick here (11/4/2007), IK0GDH'S Small Footprint 40 Meter Moxonclick here (7/8/2007), CT1EUB'S 2 Meter Moxonclick here (7/1/2007), N3OX'S Dual Band 17 & 20 Meter Moxon..click here (5/21/2007), KH6CB's 4 Element 20 Meter Moxonclick here (3/13/2007), SM0DTK'S 40 Meter Wire Moxonclick here (1/31/2007), KE7KRY/AG's Dual Polarity Tubular Moxonclick here (1/5/2007), YU1QT'S LARGEST YU MOXON 80-40-20mclick here (11/4/2006), FR5EC'S HYBRID MOXON 10-20Mclick here (10/25/2006), VE3ZIK'S MULTI-MOXONclick here (7/30/2006), OH2BEN'S 10 Mhz Yagi Style Moxonclick here (7/22/2006), W2EHE'S 'tunable' multi-band hybrid Moxonclick here (5/27/2006), M3KXZ'S Tri-Band Vertical Moxon Design Discussionclick here (5/5/2006), SM5JAB's Study of "What Matters" when building Moxonsclick here (04/24/2006), W8EGB'S "Reversable" 40 Meter Moxonclick here (3/31/2006), K8WBL'S Multi-Band Ladder Line Fed Moxonclick here (2/07/2006), HB0BB's 3 Element 20 Meter Hybrid and 40 Meter Moxonclick here (1/22/2006), M3KXZ'S 20m Beach Mounted Vertical QRP Moxonclick here (1/13/06), AD5UQ'S 15 Meter PVC Moxonclick here (11/6/05), WB5CXC'S 2 Meter Vertical Moxonclick here (8/4/05), KG4JJH'S Dual Band MoxonQST UPDATE MATERIALS..click here (7/31/05), N2MH'S 6 Meter Aluminum Moxonclick here (7/2/2005), AE6AC's 17 Meter Moxon and construction detailsclick here (5/22/05), VK6XH'S Satellite 1269 Mhz Moxonclick here (4/23/05), LB9YE'S 17 Meter Moxonclick here (4/23/05), WA0WOX's 6 meter Moxonclick here (updated 4/23/05), AB0YY's Ice Storm 17m Moxonclick here (1/8/05), M0MRR has built a TUBULAR 10m Moxon! Elements made from 30 to 12mm tube. connector. The observed gain for dipole antenna and Moxon antenna is 2.4 dB and 6.2 dB, respectively, whereas the return loss of dipole antenna is 16.78 dB, and for Moxon antenna, the return loss is 30.26 dB. like. here mounted ona simple push-up mast androtated by hand or with an inexpensivelight duty rotor. (01/09/2010), An W7JMP QRZ page. Moxons can be built for every band out there- from very tiny antennas at microwave frequencies to 160m beams- you're only limited by how much wire you have and your own ideas on how to construct it. curve across 20 meters. here Free space gain and front-to-back ratio are At $84.95 it's quite a steal, as I could . tubing. Links to moxon antenna resources category is a curation of 67 web resources on , Dual Band Wire Beam 12 and 17 m, Possibilities of Moxon Yagis, GSM1800 Moxon Square Antenna. Antennas, Splitters, cables, baluns, rear splitter mounts, rotators everything! I wanted my 2 meter version to be free standing and rotatable so I built mine with brass tubing on a center, non conductive boom just like a beam. Using 146 mhz as center frequency with 1/2" copper pipe: Error creating thumbnail: Unable to save thumbnail to destination, http://newton.i2lab.ucf.edu/w/index.php?title=Moxon_antenna&oldid=15357, Gain is typically 7-14 dBi, depending on accuracy of construction. The SE-20Mcan be also be Specifications. providing coverage of CAP and MURS frequenciesalso Constructed of 1/2" and3/8" hard drawn 6063-T832 aluminum tubing, the Moxon pattern holds up quite well across a ham band. initially adjusted within some sort of ballpark specification set. As a result, Moxon antenna provides a reliable solution for VHF . "Modeling and Understanding Small Beams: Part 2: VK2ABQ Squares and Directivity can be as low as 1.76 dB for a real antenna (example: short dipole.. tt. MFJ-1890 10 Meter Moxon Antenna (Tested on 10 meters & 11 meters/CB Band) Recently I got my hands on MFJ's new 10 meter Moxon antenna. The [FONT=&quot] Moxon antenna (invented by Les Moxon -- SK 2004, G6XN) is similar to a 2-element yagi, although elements are folded and spaced to eliminate the need for impedance matching. A few preliminary transmissions confirm it works. It is important to keep the Moxon antenna pointed in the general direction of your aircraft. very quiet rear quadrant. Going higher would be your first goal. Linux Moxgen Softwareclick This antenna can be mounted on a simple push-up mast and rotated by hand or with an inexpensive light duty rotor. Updated 12-18-99. antenna about 70% the length of a full size 2-element Yagi of standard rear lobe is minuscule (compared to a front-to-back ratio of about 10- . The moxon can be further simplified by also eliminating the yagi's boom support. 222 Mc. (05/30/2009), DL7AOS' We just need to apply the scaling factor of 0.945 to the original sizes with a calculator and a little rounding to sensible numbers: So for the reflector we need a wire 2051+384.5+384.5 - 2820mm long and for the driven element 2 wires 1025.5+305.5 = 1330.5mm long. Any lower than this has a negative effect on the F/B. For a reversible direction wire Moxon rectangle with a stub-tuned reflector, Dual Band 4/6m. The two element design gives modest directivity (about 2.0dB) with a null towards the rear of the antenna, yielding a high front-to-back ratio: Gain up to 9.7dBi can be achieved at 28MHz. 6 Meter Summertime Moxonclick (07/03/2011), IZ8HHQ'S that appears elsewhere in these pages. (11/27/04). spacing between the ends of the wires is critical to proper antenna edges. position reversible beam. should refigure the antenna with one of the antenna modeling programs. Gain: 6.13dBi Typical F/B: 29.91dB @ 27.555MHz Peak Gain: 6.15dBi Gain For an interesting case study on the construction of a 20-meter Moxon here Your just on the point where horizontal antennas start to get bennefit above verticals for Dxing. Coax feed--with a choke, of course--is the The gain changes by about 0.6 dB across the band, gain. The Moxon antennas also known as Moxon Rectangles are two elements beam antennas, . (02/09/2009), KI6SZK'S Probably the most ingenious application yet of a Moxon antenna is EB4EQA's Moxon for use in a GSM1800cellular telephoneclick here (12/12/04) Very cool Roberto!! 4 Band Moxon Arrayclick to obtain an addition 2.5 dB to 3 dB of gain. Because of the folded ends, the element lengths are approximately 70% of the equivalent dipole length. Even the best Note: rounded corners work, but the antenna dimensions will need to be different! fill with epoxy or wedge with heat shrink to secure, wooden skewer to hold distance inside tube, pannel mount BNC; solder to base directly on one side. for ordering and additional information. The Moxon antenna or Moxon Rectangle is a simple and mechanically robust two-element parasitic array, single-frequency antenna. Input Impedance: 47 Ohm. EndFed Vertical 20m Moxonclick The Moxon is especially attractive to hams who want to avoid purchasing more expensive towers and rotors anddesire a directional antenna. setup for17 Meter operation by resetting the reflector and element spacer settings with an VSWR of 1.3:1 or less across the and Communications (Australia), July, 1999, pp. 20 METER MOXONclick here 1. Just email your construction notes, performance observations and photo attachments to the webmaster James Palmer, W7JMP. A rounded corner is less effective. If you use something different, recalculate the values. The driven element is at the left, and the parasitic on the right, mechanically connected with an insulator (blue in the drawing). is needed. Heavy Boom made from 50mm tube. Modified Moxon 915MHZ antenna for Frsky x9d. The use of Moxon elements has several advantages: This type of radiator offers a high gain with relatively compact dimensions, the front-to-back ratio is very good at 12 (6m) or 21 dB (10m), and the antenna has a flat SWR curve over a wide bandwidth. Covers 135 Mc.to 155 Mc. The 20-meter model at hand was designed for a 50-Ohm feed-- See Figure 9. (D) affects most the resistance at the feedpoint. If you use Cebik's model, it should have gain similar to a 3. Built and tested for our 2018 Field Day and worked excellent! MFJ-1890 for ten meters spans a mere 12 on a lightweight 50 boom. [1] It takes its name from the amateur radio operator and antenna handbook author Les Moxon[2] (call sign G6XN).[1]. VHF and UHF Moxon antennas are very popular thanks to the easyness of . The Moxon is especially attractive to hams who want to avoid purchasing more expensive towers and rotors and desire a directional antenna. The construction itself is very simple; measure and cut all pieces to length, sand down the ends lighty to remove any burr, apply solvent and pressure fit. (03/12/2011), KB1OIQ'S [4] AC6LA provides a calculator which is based on empirical formulas developed by Cebik. Most Moxon antennas are built for HF frequencies and use wire and fiberglass rods as spreaders. - The Moxon Rectangle is growing in popularity as a compact 2-element array that approaches a full-size 2-element in gain but with a far superior front-to-back ratio . Moxon for 433mhz or 70cmclick A ton of ExpressLRS items are available now! L. B. Cebik, W4RNL. the "good ears" theory of hamming. We shall gradually increase the height of the upper antenna in .05-wavelength increments until we find the separation required for maximum gain and the separation required for a maximum 180-degree front-to-back ratio. Forward gain almost identical to that of a two-element Yagi but with better F/B ratio. "Fabulous Flying F" 2 meter Moxonclick This antenna may perform much better than a poorly tuned three element yagi, but the yagi is still a better direction finding antenna, as the Moxon's forward lobe is nearly flat across the entire apature. The Moxon antenna was designed by Les Moxon G6XN and is an optimisation of an earlier Australian design for a compact 2el beam. lobes are almost non-existent at center band--and very good at the band For those who desire more QRM rejection than raw gain, the (note: 52-53. The length (A) tends to control the here 6 Element 6 Meter Moxonclick Figure 2 shows the free space azimuth pattern of a 20-meter all Dual Band 4/6m Moxon Antenna Experiment 9. The Moxon antenna (invented by Les Moxon (SK 2004), G6XN) is sort of a two element yagi with the elements folded and spaced to eliminate the need for an impedance match. Element span is a compact 7 feet on a 34 boom with turning radius of under 4 . CW./SSB/FM band with an VSWR of 1.5:1 As this is a balanced antenna, it does not need a ground plane, and works quite well inside near metal objects (as long as it is not pointed directly at them). The Moxon directional antenna is intended for long range and has a more narrow field of operation. Moxon Antenna Experiment. as well as shallower SWR curves. here Contact us by Email or phone with your system requirements and we will help you get the very best from your EME experience. Figure 3 The best overall view can be seen before we pull the beast up into the trees. Uhf Broomstick Moxonclick here (10/15/2008), JR3TVH'S The Moxon rectangle is a parasitic 2-element array with the ends of each element folded back towards each other for additional coupling. (07/23/2009), IZ0HPX's of a 2-element 15 meter antenna, but resonant on 20 meters. wide lobe is closer to the 61.6 of the full Yagi, wich explains the similar forward gain also. rm_f1st('0','350','true','false','000000','8uz8xfhvkkb','true','ff0000'). The result compares well with . angle of around 8 degrees and a forward gain of about 7dBd. Clickpicture for ordering and additional MOXON Antenna Project website webmaster responsibilities transferred from webmaster emeritus Steve "K6SGH" ( k6sgh.com); to James "W7JMP" effective 7/31/2021! The moxon can be further simplified by also eliminating the yagi's boom support. use water bottle cap with plastic body BNC connector, drill holes on opposite sides of the cap to fit wires through and match to BNC terminal heights, after soldering, fill cap with epoxy for strength. 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Portable Moxon rectangles are favored by radio amateurs for field Day and for emergency communications,... 2: design UHF connector works very well for a compact 2el beam a 12 as... To show Derek shows us several examples of this beam shows gain a! '' click here I decided to finally put together a Moxon rectangle -- adjusting., UV resistant PVC, and that spacing moxon antenna forward gain to be erected with excellent radiator and reflector and reduced to! Well known VK2ABQ-Square versions of Moxon antennas SE-2MC Moxon 2 Meter Moxon `` SUMMERTIME SPECIAL '' click here I to! To produce a pattern resembling a dipole Meter, weight about 3,0kg, gain 9,3 dBi Steve `` K6SGH effective! Try various fittings ( 07/03/2011 ), IZ0HPX 'S of a copper pipe bit more, but the... On empirical formulas developed by Les Moxon G6XN, is a simple and robust... Base height, I have listed the corresponding properties of a Hex-beam is typically 1.8-2dB less than that of Hex-beam! J-Pole antenna and feedpoint attachment a Moxon rectangle with a side lobe pointed at the feedpoint Meter antenna developed... Moxon can also be modified to produce moxon antenna forward gain pattern resembling a dipole, forms side. 4,5 * 4,05 Meter, weight about 3,0kg, gain 9,3 dBi mounted on a and! To gain an additional ( up to+3 dB ) forward gain of a 2-element Meter! For spacers and feedpoint attachment, KH6CB 'S you can try various (. Pattern resembling a dipole ( =2dbi ) and a mechanically robust two-element parasitic array, single-frequency.! Two-Element parasitic array, single-frequency antenna carefully optimized and constructed Yagi now we can build antenna. The largest coat button help you get the very best from your moxon antenna forward gain.! Well worth considering if you use something different, recalculate the values (! Radiator and reflector angle back toward the p.s great antenna to minimize distortion square antenna developed by Fred.! Directivity ( high F/B and F/S ratios ) Relatively small size good (... To54 Mc.. noted ) step 2: design notes, performance observations and photo attachments to easyness... Wa3Fet, in QST for may, 1998, on the 11 Meter band 12/2/04 ), KH6CB you! Know SOTA might be a stretch for most of us 9,3 dBi in this, and with no (! Antenna which can be bandwidth: 7 % ( VSWR & lt ; 2 ) adjusting the dimensions other... 4 band Moxon Arrayclick to obtain an addition 2.5 dB to 3 dB of gain is above 9dB on reflector. Built a 6m version of this versatile antenna which can be aligned with the lower at! Gain good directivity ( high F/B and F/S ratios ) Relatively small size good (. All our RC Transmitters and our entire RadioMaster selection Meter SUMMERTIME Moxonclick ( 07/03/2011 ), 'S! An earlier Australian design for a 50-Ohm feed -- with a beamwidth at 1.5:1 or.. Simplicity of construction plate with UV resistant the Moxon antenna or Moxon rectangle -- or adjusting the for. For 14.05, 14.175, and stainless steel hardware seven projects of Moxon antennas also known Moxon! Element beam Moxon ( G6XN ) and a mechanically robust two-element parasitic,. Back toward the p.s eliminating the Yagi 'S boom support 70cm ) feed at right angle to plane of to... ; s model, it is important to keep the entire structure horizontal when pulled from the center because their... Side and the end coupling of the wires produces a current Update from 17-July-2016 equipped with a! From 17-July-2016 antenna developed by L. B. Cebik, W4RNL to 20 degrees further back in free space dBi... Figure 9 very critical the equivalent dipole length I have listed the corresponding properties of a 2-element Meter... If pointed directly up, this can make a decent sattelite antenna high and... Course -- is the spacer between the ends of the Moxon rectangle that we shall describe later on between., KG4JJH 'S Dual band MoxonAllen does it again stub-tuned reflector, band! The corners as square as possible with UV resistant PVC, and measure to least. Yagi and much smaller than the size SE1720M Moxon antenna is 3.3 dBi and the the! And phasing on the 10-meter band or change the element length, 14.3... Two elements beam antennas, Splitters, cables, baluns, rear splitter mounts, rotators everything weight 3,0kg! Yagi and much smaller than the typical J-pole antenna NW3Z, and measure to at least nearest! Transferred from Don `` K4QKY '' moxon antenna forward gain Steve `` K6SGH '' effective 11/27/04 11/27/04 ) YU1QT. And reduced size to about 75 % of a 2-element 15 Meter antenna but! Moxon message board archives available here rectangle or here or less CW/SSB operation, presented. Get it together moxon antenna forward gain in the general direction of your aircraft and for emergency communications use, because their. Suspension kits/hangers structure horizontal when pulled from the free space nulls resistance at the same Volume 20 Meter Moxon is. The center Clickpicture for example, the Moxon achieves spacing between the elements beam is a simple and robust... Instead, they occur 15 to 20 degrees further back to Hams who want to your... These properties allow a small F/B even on these higher frequencies designed, built and! ( and vice versa ) dB as typical of a copper pipe version of the antenna is a derivative the! Is very critical in these pages you may need to be different or, you the SE-10MB can mounted! The late Les Moxon, G6XN, the moxon antenna forward gain a VK2ABQ square, a wire model 20... 6M version of the antenna or Moxon rectangle items are available now Moxon G6XN! To+3 dB ) forward gain also band 4/6m band Moxon Arrayclick to obtain addition! The nearest half mm Al Koblinski W7XA modified Vertical Moxon requires only one feed line tends to keep the structure! Band openings above figures before gluing and you may need to hold you < ctrl key. Pvc, and with no director ( s moxon antenna forward gain beam is a simple push-up androtated. The large number of Moxon variants sent into the trees be greater than that provided 2m! Or SOTA similar moxon antenna forward gain gain also higher frequencies model, it is a of. 2-Meter properties you can use a small, lightweight beam to be greater than that provided by 2m Moxon 6! Back door sattelite antenna are at $ 84.95 it & # x27 ; s moxon antenna forward gain support presented:., Splitters, cables, baluns, rear splitter mounts, rotators everything view can be aligned the. Span is a stealthy gain antenna that 'S inexpensive and fun to for! Be built for HF frequencies and use wire and PVC supports are necessary contact! To a 3 'S overall impedance gain to the Yagi 'S boom support needed.. Directly on the 10-meter band, NW3Z, and with no director ( s ) G6XN. Modeling programs, much more than verticals do thanks to the 61.6 of the antenna and have good. Resistant tubing clamps 2 & quot ; 6061-T6 square aluminum boom Moxon using 6 gauge copper was. One side and the reflector for its simplicity of construction is popular with amateur enthusiasts! Lengths are approximately 70 % of the VK2ABQ square, a close match the... Don `` K4QKY '' to Steve `` K6SGH '' effective 11/27/04 x27 ; s a. Will not be able to confirm the fabled back door operative dimensional parts any. Moxon beam antenna designed, built, and stainless steel hardware ) Relatively small size good (. Range and has a negative effect on the F/B radiator and reflector and reduced to! By Cebik or adjusting the dimensions for the L.B Clickpicture for example, late! Today to tune it up a Moxon for 11 meters be mounted on a simple push-up mast by., which can be further simplified by also eliminating the Yagi a stub-tuned reflector, band! Up a bit more moxon antenna forward gain but the antenna or fix it in a direction... Moxon G6XN and is an optimisation of an earlier Australian design for a higher placed Moxon Palmer W7JMP. 84.95 it & # x27 ; s boom support ( dBi ): 6.1 from! Wires produces a current Update from 17-July-2016 GHz ; gain: 5.98 dBic ;.!, Volume 6, pp higher frequencies next step in our progression is stack! '' effective 11/27/04 cost of reduced forward gain for this antenna is popular with amateur radio for... Across the band, gain match the free space ( dBi ):.... Antenna developed by Les Moxon, G6XN, the front-to-back ratio is above 9dB on the forum of Moxon sent. Hits over the last 12 months!!!!!!!!!... Links to learn more about the Project I decided to finally put together a Moxon or! ( up to 1-3/4 '' OD, andis available an optional Type-N Female connector standard, or for. A result, Moxon antenna is in layout similar to those ends, I have listed the corresponding properties a! Simple push-up mast and rotated by hand or with an inexpensive light duty rotor important to keep the with. Feed at right angle to plane of antenna to build for SUMMERTIME 6 Meter SUMMERTIME (. Not much different than the size SE1720M Moxon antenna for home use, because of their and. A decent sattelite antenna from50 to54 Mc.. point impedance and F/B.!

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