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Effect of raising vertical antenna higher
I don't know the minimum height above ground (in wave lengths) that make the improvement in an antenna. However, Steppir antennas says that an antenna on the ground needs 120 radials just to match one in the air with two radials. I would like to know where the noticable benefit of raising an antenna above the ground actually takes place and where is the maximum benefit. I know that the higher the better, but rather than that kind of benefit, I am wondering from a ground standpoint where the benefits start and where the point of diminishing returns begins. Thank you to everyone who answered my question. The reason I asked is because I am designing a vertical that can be ported to a location and setup as a single band vertical for whatever band is desired at the time. I was wondering if I could raise it about ten feet or so and use radials as guy wires to get a better effect than laying it on the ground. I figured I might could get away with using 4 to six radials and have an improvement. I am still not sure of the answer, but I think I have figured out that if I use six radials at ten feet, it will still be better than 6 radials on the ground. Of course, I am wondering if I will be able to use more than three or four radials at the time. Thanks again. -- 73 for now Buck N4PGW |
#12
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Effect of raising vertical antenna higher
Thank you to everyone who answered my question.
Hi Buck - you must be having an out of mind moment - this was MY question :-) Dave WB7AWK ps - thanks for all the responses to my question, as well as to Bucks imaginary question. |
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