A 20m Vertical Beam

This interesting design achieves results

Adventures in Amateur Radio

JP1QEC developed a portable 20m vertical beam he calls the “Garden Beam Antenna“. I built one this afternoon and have it pointed towards Europe. Construction is stratightfoward. I used a fishing pole to first make a 20m 1/4 wave vertical. It has two ground radials that are about 18 feet long. A third radial extends 18.7 feet from the driven element in the direction opposite where you want the main energy to go. This is connected to two more 18 ft radials and the vertical reflector element also mounted on a fishing pole. I ended up with a very flat SWR of 1.6 across the entire 20m band. I suspect that there needs to be some tweaking to optimize the pattern but I am seeing some directionality based on signal reports from making some JT-65 contacts. The beam is pointed on a bearing of about 40°. I get…

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