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Questions tagged [counterpoise]

Elevated ground plane

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9 votes
7 answers

When and why does the size of a ground plane or radials matter?

Consider these three cases: My understanding is that when building or installing an antenna designed to operate over a ground plane (e.g. a quarter-wave vertical), the size of the ground plane does ...
Kevin Reid AG6YO's user avatar
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4 votes
1 answer

How Does the Performance of Elevated Radials Differ from That of Buried Radials?

NEC4.2 provides some information about this topic that may be of interest to some readers.
Richard Fry's user avatar
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6 votes
7 answers

Does a 1/2 wavelength end-fed antenna need a good RF ground?

I was searching for DIY end-fed antenna. Some of the articles I found say that for a 1/2 wavelength end-fed I need a "small to no counterpoise" (with a lambda*0.05 m counterpoise), but some other ...
Hose Dias's user avatar
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3 votes
2 answers

How low can a vertical dipole be mounted?

An answer to this question suggests that raising a vertical dipole sufficiently can create the effect of a phased array. How about the opposite. How low can a vertical dipole be mounted? Can a ...
hotpaw2's user avatar
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1 vote
2 answers

Vertical antenna

I'm installing a vertical antenna in back yard. About 20 feet in height and using 1 counterpoise wire 16 feet for 20 meters. Does installing two or more counterpoise wires help?
Jim's user avatar
  • 11