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