![]() ![]() ![]() 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. A multi-band wire antenna that performs exceptionally well even though it confounds antenna modeling software ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |