These stubs put the instantaneous RF current in the end elements in phase with that in the center element. In its standard configuration, a collinear antenna uses phase reversing stubs added at the ends of a center fed dipole. In short, the Mystery antenna is a sky wire that incorporates the advantages of a 3 element collinear and the G5RV antenna. Additionally, the Mystery antenna is designed to work at least as well, on the other HF bands as a G5RV. The Mystery antenna, on the other hand, presents a six-lobe pattern on 20 meters, gain broadside to the antenna, and also low feed point impedance to simplify matching the antenna to the rig. Varney had two specific reasons for selecting a 3 half waves on 20… he wanted a four-lobe radiation pattern, at least unity gain and a low feed point impedance. Louis Varney’s antenna, although three half waves long, was an out-of-phase aerial. It may sound and look like a G5RV but it is a substantially different antenna on 20 meters. The W5GI Multi-band Mystery Antenna is a fundamentally a collinear antenna comprising three half waves in-phase on 20 meters with a half-wave 20 meter line transformer. All that’s needed is two vertical supports (trees work well) about 130 feet apart to permit installation of wire antennas at about 25 feet above ground. The antenna is especially well suited to hams who are unable to erect towers and rotating arrays. The “mystery” part of the antenna comes from the fact that it is difficult, if not impossible, to model and explain why the antenna works as well as it does. Feedback from users indicates that the antenna has met or exceeded all performance criteria. The W5GI Mystery antenna, erected at various heights and configurations, is currently being used by thousands of amateurs throughout the world. It’s similar to a G5RV but a much better performer especially on 20 meters. It is approximately 100 feet long, can handle the legal limit, and is easy and inexpensive to build. This antenna covers 80 to 6 meters with low feed point impedance and will work with most radios, with or without an antenna tuner. Taylor, W2OZH, in which he described a low profile collinear coaxial array. The design of the Mystery antenna was inspired by an article written by James E.
Ham antenna modeling software software#
The Author, ON5AU - From the start as radio ham, I was always interested in the know-how of antennas and most of my antennas were and still are home brew, such as cubical quads, Yagis, delta loops, multiband dipoles, ground plains, etc.A multi-band wire antenna that performs exceptionally well even though it confounds antenna modeling software He is a master to explain in a clear way many other AutoEZ specific tricks. It is amazing to discover how Marcel manages to reposition a rather complex antenna structure. John Devoldere, ON4UN - I highly recommend Advanced Antenna Modeling to get experience with all the clever features AutoEZ offers. If you enjoy modeling, as I do, reading this book will spark many thoughts of “That's very clever!” and “I had no idea that was possible!” View the book concept with the article "Using AutoEZ with Antenna Modeling" It's available on the website Dan Maguire, AC6LA - Both the scope and depth of material in Marcel's Advanced Antenna Modeling book are truly amazing. As you progress, you'll discover the strength of modeling with the extra use of various AutoEZ features. Step by step you are guided and explained to become familiarized to important functions and procedures along the way. With Advanced Antenna Modeling, you can evaluate and adjust pre-designed models and create your own models.
Ham antenna modeling software how to#
It provides a detailed explanation to use EZNEC, the most popular antenna modeling program used by radio amateurs today, and thoroughly how to optimize the model with the AutoEZ application in conjunction with EZNEC. Modeling, a powerful tool in Amateur Radio, can help you to design antennas and optimize their performances.Īdvanced Antenna Modeling is in every respect the guide to using modeling software for designing, optimizing and evaluating antennas. It provides a detailed explanation to use EZNEC, the Over the last two decades, computerized antenna modeling has advanced greatly. Advanced Antenna Modeling is in every respect the guide to using modeling software for designing, optimizing and evaluating antennas. Modeling, a powerful tool in Amateur Radio, can help you to design antennas and optimize their performances. Over the last two decades, computerized antenna modeling has advanced greatly.
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