Constructed of 12 and 38 hard drawn 6063t832 aluminum tubing, 6061t6 aluminum, uv resistant pvc, and stainless steel. Stressed moxon antenna the sm50 is a directional 6m antenna occupying approximately 50% of the space of a 2 element yagi, yet having similar gain and better fb. A collection of seven projects of moxon antennas for ham radio hf bands. The design is rectangular, with roughly half the rectangle being the driven. New material includes smart antennas and fractal antennas, along with the latest applications in wireless communications. Another practical handbook is the arrl antenna book. 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. There are moxon calculators on the net thatll help you do that. Jul 02, 2015 2m moxon antenna project montgomery county ares 2008 use the moxon program to design the antenna. Oct 11, 2012 okay, simply put you can get a moxon to be usable on 27. Occasionally the equivalent term aerial is used to specifically mean an elevated horizontal wire antenna.
But as the moxon gets it fabulous performance from the capacitive coupling between the ends of the two elements one should avoid upsetting this geometry. Design goals some forward gain good directivity high fb and fs ratios relatively small size good bandwidth min. Any such, capacitive, load should be placed at a high impedance point of the antenna. The moxon antenna or moxon rectangle is a simple and mechanically robust twoelement parasitic array antenna. The discipline of antenna theory has experienced vast technological changes. A satisfactory point for installing a capacitive load is. The stressed design allows the antenna to be light weight yet strong. In response, constantine balanis has updated his classic text, antenna theory, offering the most recent look at all the necessary topics. This is a world wide web front end for a public domain program written by w4vp9kf using php. Moving to the moxon design also saved me quite a bit of space.
The moxon has been carefully reoptimised by g0ksc to produce an even more stunning antenna with exceptional gain and bandwidth. A good book on antenna theory would look nice on your bookshelf. For an overview of this antenna see the cebik article the moxon rectangle. The antenna gain, or power gain of an antenna is defined as the ratio of the intensity power per unit surface area radiated by the antenna in the direction of its maximum output, at an arbitrary distance, divided by the intensity radiated at the same distance by a hypothetical isotropic antenna which radiates equal power in all directions. The pvc items are readily available from the local hardware store and are very inexpensive. Joseph moxons most popular book is the art of joinery. Stressed moxon antenna par electronics filters for the.
Small is a relative term, a 20 meter vertical moxon is indeed a big antenna. Once the matchbox and reflector wire are attached phillips screw driver the antenna tunes and mounts without. Nov 26, 2017 the moxon is suspended above the horizontal 1x2 board although it looks as though it is sitting on it. Modifying an existing antenna might be a little more difficult than just building one up from scratch. Balanis the discipline of antenna theory has experienced vast technological changes. The performance of the antenna, through the model, will be explored in several typical settings. Raising it was actually harder than putting up a 43 aluminum whip. The sm50 is a directional 6m antenna occupying approximately 50% of the space of a 2 element yagi, yet having similar gain and better fb. Se1720m moxon antenna for 17 or 20 meter operation. Ictpituursi school on wireless networking for development the abdus salam international centre for theoretical physics ictp, trieste italy, 5 to 24 february 2007. Sep 09, 2016 a collection of seven projects of moxon antennas for ham radio hf bands. This book is a classic, and i mean it goes back to 1939 before people even knew antennas existed. It has some math, but not enough to make your brain explode. This program has been derived from a public domain basic program written by l.
If your planning on experimenting with moxon antennas theres one essential tool youre going to need. W4rnl top five backyard multiband wire hf antennas. Compared to the moxon 4 element this antenna has one element extra between the two moxons. Building the 6 meter moxon antenna kb9vbr jpole antennas. The ultimate reference for amateur radio antennas, transmission lines and propagation. What is the best book for antennas and wave propagation. Jul 23, 2014 the moxon antenna is named for the late les moxon, g6xn who first described it in twoelement driven arrays, a qst magazine article published in july of 1952.
The doubled of peter dodd is an interesting design for a very compact garden and has recently been redesigned for the 2nd edition of g3ldos wellknown book, antenna. The origin of the word antenna relative to wireless apparatus is attributed to italian radio pioneer guglielmo marconi. Let me make sure that i have this rightmoxon qrz forums. Vk2abq may have been the first to publish a design with his square antenna. Jun 07, 2012 so, the feed point remains in the middle of element, providing a perfect match, but the cable leaves the end of antenna or the corner of moxon. Modeling the 40m w6nl moxon 1 april, 2012 modeling the w6nl 40m moxon greg ordy, w8wwv april, 2012 v1. The 6 meter moxon is built from 5 8 inch od and 1 2 inch od aluminum tubing with 3 8 inch od solid aluminum for the corners. 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. John simpson, kg4zow download source code for this program moxon algorithm and diagram are from moxon moxgen. Compared to the moxon 4 element this antenna has one element extra between the two moxon s. A tutor to astronomy and geography, or, a easie and speedy way to know the use of both the globes, coelestial and terrestrial in six books with an appendix shewing the use of the ptolemaick sphere by joseph moxon 1674 by. It takes its name from the amateur radio operator les moxon amateur radio call sign g6xn. For this moxon beam or moxbeam project i describe a portable version of my attic antenna that is built from composite lumber, fiberglass tubing.
Ham radio portable moxon antenna vhf 145 mhz supports by. The moxon rectangle principle shows up in a number of designs, some of which make clear reference to g6xns work and others of which seem unaware of the roots of the antenna. A simple 2m moxon antenna indoor antenna help by k2zs. Find the top 100 most popular items in amazon books best sellers. Joseph moxon has 22 books on goodreads with 205 ratings. Ictpituursi school on wireless networking for development the abdus salam international centre for theoretical physics. The arrl antenna book for radio communications has everything you need to design your own complete antenna system. What if i put here a ferrite choke right on the braid, or, possibly better, make a trap with several turns of the cable with trimming capacitor e.
Jun 11, 2014 the moxon antenna, designed by les moxon g6xn sk, is a compact two element beam antenna with about 5. A 6 meter moxon antenna discover 6 meters for the first time or enhance your existing operation with a rugged but portable version of this novel 2 element antenna. Moxon background several designs emerged in the 1970s for reduced size beam antennas implemented by folding the elements. The antenna is similar to a 2element yagi with the element ends folded toward each other. Fishing for radio signals with the moxon antenna hackaday. Ham radio antenna books and publications category is a curation of 11 web resources on, electromagnetic waves and antennas, ideas and projects for qrp, p j grimshaw. The 2elementyagi with reflector has normally a 0,2 lambda boom and an impedance. The program is based on an algorithm developed by l. Dimensions 4,5 4,05 meter, weight about 3,0kg, gain 9,3 dbi. In the summer of 1895, marconi began testing his wireless system outdoors on his fathers estate near bologna. Essentially it consists of two metal or wire elements. My 2 meter 6 element super duper moxon antenna by stepehn binns wb8aht a modified haarp antenna by phil simpson m0pxs a modified super moxon antenna by gw3ydx this 2 meter antenna has 2 characteristics that make it a very favorable antenna to have. Since 1939, it has maintained its place at the forefront of amateur radio technologya single resource covering antenna theory, design and construction, and practical treatments and projects.
This book is by les moxon, designer of the moxon antenna. The words antenna and aerial are used interchangeably. Dan maguire, ac6la has made an application the calculates all of the dimensions for any moxon antenna. However, it is a really good book on hf antenna designs and theory which can also be scaled to vhf and uhf applications.
Ham radio portable moxon antenna vhf 145 mhz supports by sterminato is licensed under the creative commons attribution share alike license. The antenna performs quite well on the 2 meter band, even though it was designed exclusively for the lower 3 murs channels. This is a good book for practicing engineers and amateurs, as it attempts to give the theory and hands on antenna projects. The moxon antenna, designed by les moxon g6xn sk, is a compact two element beam antenna with about 5. Liked by view all give a shout out if you print this thing and display it in public proudly give attribution by printing and displaying this tag. Moxon g6xn in his book hf antennas for all locations rsgb publications, great britain 1993.
The mfj1890 is a lightweight aluminum antenna designed to operate in the 10 meter band and we had hoped that with a little messing around we could get it to tune to the 11 meter cb band. Moxon antenna for 144 mhz the moxon antenna or moxon rectangle is a simple and mechanically robust twoelement parasitic array antenna. The moxon antenna design the moxon antenna was designed by les moxon g6xn and is an optimisation of an earlier australian design for a compact 2el beam. Les was looking for a compact design for the hf bands when he asked the question.
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