Re: Antenna gain question


Ron wrote:
Assume an incoming rf signal has exactly the same strength in all 3 dimensions i.e., completely omnidirectional. Question: would an antenna having gain capture any more signal power than a completely omnidirectional antenna with no gain?

Ron, W4TQT 

Yes.

The amount of signal "captured" from a given direction is exactly proportional to the gain in that direction. "Capture area", "effective aperture" and "gain" are simply different ways of expressing the same thing, as long as perfect efficiency is assumed; if you know any one you know the other two.

Roy Lewallen, W7EL
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