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In a ground plane, what dictates the number and spacing of radials?

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January 12th 05, 04:37 PM

Walter Maxwell

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On 11 Jan 2005 22:26:54 GMT, (Fractenna) wrote:

Radials function as a counterpoise, and, when there are enough radials, a
ground plane.

If you wish to attenuate ground losses, then it is best to make the most of the
surface by using as many radials as possible. The first dozen+ are the most
critical in reducing ground losses. Even a dozen or so helps substantially or
over 3, for example. Several dozen reduces ground losses substantially.

Elevating radials always helps.

73,
Chip N1IR

Well, Chip, as the inventor (Dr. George H. Brown) said, two radials
are sufficient for a ground plane, but the RCA sales dept thought they
would sell better with four. But a ground plane antenna suffers no
ground losses, so using as many as possible only applies to radials on
or in the ground.

Walt, W2DU

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