I mounted my 6 meter moxon beam on an inexpensive tv style antenna rotator, which is, in turn, mounted on a 30 foot rohn galvanized steel pushup mast. Moxon is a stealthy gain antenna thats inexpensive and fun to build. The origin of the word antenna relative to wireless apparatus is attributed to italian radio pioneer guglielmo marconi. The resulting antenna has a low radiation pattern and an impedance of 55 60 ohms. Pdf a miniaturized unidirectional moxon antenna for uhf rfid tags. The moxon antenna, designed by les moxon g6xn sk, is a compact two element beam antenna with about 5. The antenna is credited to les moxon g6xn, and while it is well known by most ham operators, many cbers may be unaware of this design. We are pleased to offer the 21st edition of the arrl antenna book. If you view the various antennas in the whats new section on the homepage, youll see what we mean. The performance of the antenna, through the model, will be explored in several typical settings. 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. Dimensions 4,5 4,05 meter, weight about 3,0kg, gain 9,3 dbi. Making an indoor fm moxon antenna pages 1 4 text version. Its a great saturday antenna project especially for new hams seeking their first gain antenna.
The moxon has been carefully reoptimised by g0ksc to produce an even more stunning antenna with exceptional gain and bandwidth. A novel uhf rfid dualband tag antenna with inductively coupled. Py1bek vertical antenna for ham radio 40meter ham band 7 mhz this selfsupported vertical antenna was made with aluminum tubes of 3 m in length that have an external diameter of 32 mm and a wall thickness of 1. Les moxon, g6xn, whose book hf antennas for all locations is now in its second. Cebik, w4rnl, developed an algorithm for calculating the dimensions of a moxon rectangle antenna.
Doublet multiband antenna that is not resonant on a particular band. This note looks at the antenna and antenna model for the 40 meter moxon yagi designed by. This beam is a 2elementyagi with radiator and reflector and reduced size to about 75% of a normal beam. You can publish your book online for free in a few minutes. The moxon antenna is a parasitic dualelement array with the ends of. It has some math, but not enough to make your brain explode. 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. The antenna is similar to a 2element yagi with the element ends folded toward each other. This is a world wide web front end for a public domain program written by w4vp9kf using php. The moxon antenna array pattern having single sidelobe suppression at 122 obtained by the proposed method and the pattern of. 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. There is an explosion of available books and articles on the subject of antennae and antenna systems.
The moxon antenna is a relatively simple antenna to build as it consists of just 2 elements, yet has a decent gain of about 6 dbi and a fronttoback approaching 30 dbi or more. Cebik, w4rnl the moxon rectangle is a fascinating antenna on several scores. Moxon antenna last updated june 28, 2019 moxonantenne for 20mamateur band moxon antenna for 144 mhz. That way, he can reverse the beam and do away with expensive and maintenanceintensive rotators.
The moxon antenna or moxon rectangle is a simple and mechanically robust twoelement parasitic array antenna. The year after he first introduced the moxon rectangle in qst, l. The moxon can show very fine fbratios indeed, above 40 dbs have been mentioned. 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. Since 1939, it has maintained its place at the forefront of amateur radio antenna technologya single resource covering antenna theory, design and construction, and practical treatments and projects. The arrl antenna book for radio communications, 23rd. The center lead of the coax forms one half of the dipole and the braid forms the other. Although this book was very technical, indeed too technical for most new hams to understand, the ideas put forth by moxon were invaluable. A satisfactory point for installing a capacitive load is. The back two rectangles were reflector, driven element and 2 directors like the super moxon antenna. This beam is a 2elementyagi with radiator and reflector and. Les moxon, g6xn, whose book hf antennas for all locations is now in its second edition, made two very significant discoveries about the caton squares. However, it is a really good book on hf antenna designs and theory which can also be.
The arrl antenna book for radio communications softcover. Balanis the discipline of antenna theory has experienced vast technological changes. The pvc items are readily available from the local hardware store and are very inexpensive. The arrl antenna book for radio communications has everything you need to design your own complete antenna system. Ham radio portable moxon antenna vhf 145 mhz supports by sterminato is licensed under the creative commons attribution share alike license.
However, it is a really good book on hf antenna designs and theory which can also be scaled to vhf and uhf applications. Constructed of 12 and 38 hard drawn 6063t832 aluminum tubing, 6061t6 aluminum, uv resistant pvc, and stainless steel. 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. Building the moxon antenna is fairly easy and lends itself to imagination. Dan maguire, ac6la has made an application the calculates all. Ham radio portable moxon antenna vhf 145 mhz supports by. However that figure is only achievable in practice if the antenna is in free space. So i build the thing to the measurements, take it out to the back yard and get it up and the. The moxon antenna or moxon rectangle is a simple and mechanically robust twoelement.
Moxon antenna for 144 mhz the moxon antenna or moxon rectangle is a simple and mechanically robust twoelement parasitic array 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. The antenna itself is an offcenter fed vertical dipole made by flipping an electrical quarter wavelength of braid back over the outside of the coax. Moxon antenna high swr and reactance worldwidedx radio. He asked me to write this small program incorporating his work and i was happy to oblige. The vertical bazooka antenna iw5edi simone hamradio. The arrl antenna book for radio communications, 23rd softcover edition has everything you need to design your own complete antenna system. Modeling the 40m w6nl moxon 1 april, 2012 modeling the w6nl 40m moxon greg ordy, w8wwv april, 2012 v1. It features a succinct treatment of the finite difference, time domain fdtd computational technique.
New material includes smart antennas and fractal antennas, along with the latest applications in wireless communications. The advantage of a directional antenna on transmit over a dipole is it might have a bit more transmitted signal level in the primary direction. 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 technology a single resource covering antenna theory, design and construction, and practical treatments and projects. Antenna archives page 3 of 7 iw5edi simone hamradio. Links to moxon antenna resources category is a curation of 69 web resources on, n2yet moxon projext, the gw3ydx super moxon antenna, moxon rectangles. This is the name of an excellent antenna book written by les moxon, g6xn sk, and published by rsgb in 1982. Once the matchbox and reflector wire are attached phillips screw driver the antenna tunes and mounts without. The moxon antenna is a simple two element parasitic array antenna. This book is by les moxon, designer of the moxon antenna. Making an indoor fm moxon antenna whether you are an fm dxer or just want to listen. This antenna consists of 3 moxon rectangles mounted on a boom. A six meter moxon made according to these figures forms a rectangle approximately 83 inches long, by 30 inches wide.
All sales from these products go to support the moxon project website. Highly respected authors have reunited to update the well known 1981 edition which is still hailed as one of the best in its field. 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. The moxon rectangle is a 2element parasitical beam or unidirectional antenna about. Any such, capacitive, load should be placed at a high impedance point of the antenna. Speedometers, thermometers, swr meters, and smith charts. Pdf moxon antenna array design and pattern synthesis technique. Im building the antenna from 716ths inch and 38ths inch tubing. The radiation pattern is shown in the traditional arrl style and was generated from the final design by xnecview. This edition includes recent antenna innovations and applications. The design is rectangular, with less than half of the rectangle being the driven element and the other half being the reflector. An antenna system is the antenna and everything else between the antenna and the radio. It takes its name from the amateur radio operator les moxon amateur radio call sign g6xn.
Although i have written about this design before, questions still pop up regularly. A truly portable moxon rectangle for nearly notool field assembly. Building the 6 meter moxon antenna kb9vbr jpole antennas. It is also the first text to treat physical theory of diffraction ptd. Stressed moxon antenna par electronics filters for the. This antenna can be mounted on a simple pushup mast and rotated by hand or with an inexpensive light duty rotor. Fishing for radio signals with the moxon antenna hackaday. The following schematic shows the moxons geometry and radiation pattern. Discussion in general technical questions and answers started by guest, jun 16, 2006.
Occasionally the equivalent term aerial is used to specifically mean an elevated horizontal wire antenna. If your planning on experimenting with moxon antennas theres one essential tool youre going to need. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. The moxon beam by dk7zb, moxon yagi, moxon antenna. Essentially it consists of two metal or wire elements.
All products have a money back guarantee and we can attest to their quality. The second article i found is about the haarp antenna by phil simpson m0pxs. What is the best book regarding antenna systems excluding. Moving to the moxon design also saved me quite a bit of space. It is popular with amateur radio enthusiasts for its simplicity of construction and great performance. Se1720m moxon antenna for 17 or 20 meter operation. I then ran it through eznec to make sure it was correct. Pdf a unidirectional moxon antenna for uhf rfid tags is. In response, constantine balanis has updated his classic text, antenna theory, offering the most recent look at all the necessary topics. The stressed design allows the antenna to be light weight yet strong. Its footprint is probably the biggest positive attribute, as its only 12 feet in total length 6 feet on either side of the boom. For this moxon beam or moxbeam project i describe a portable version of my attic antenna that is built from composite lumber, fiberglass tubing.
The moxon offers excellent front to back gain and good rejection as well. He proposed all kinds of antennas for all kinds of locations. Describe your experience with the mfj1896 6m rigid moxon antenna and tell us why you give it the rating you did required. No two moxon s are identical save the dimensions of the elements and spacings. I used the moxgen program to get the measurements of the antenna. Moxon prefers matched elements, tuning each of them to optimum performance remotely. Compared to the moxon 4 element this antenna has one element extra between the two moxons.
The design is rectangular, with roughly half the rectangle being the driven. At right is atypical theoretical pattern generated by f6irf which showsa. The words antenna and aerial are used interchangeably. Description and phots of a diy moxon antenna for six meters band, includes clear pictures, drawings and assembling instruction to build this compact antenna. In the summer of 1895, marconi began testing his wireless system outdoors on his fathers estate. Les was looking for a compact design for the hf bands when he asked the question. With these two devices at hand the moxon antenna is far more easily constructed as it relaxes some of the most critical constructional difficulties. 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.
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