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#11
March 18th 08, 07:53 AM
posted to rec.radio.amateur.antenna
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Antenna physical size
Mike Coslo wrote:
On Fri, 14 Mar 2008 11:57:41 -0700, Roy Lewallen wrote: Richard Harrison wrote: Build a small scale model that can be tested indoors and report its characteristics. Antennas are scaleable. That's more easily said than done. One of the critical characteristics of a small antenna is loss. And to correctly replicate loss in a scaled antenna requires scaling the conductivity of the conductors as the square root of the frequency. To scale to a higher frequency requires that the conductivity be better than the original. Unless the original is made from lead and the scale factor moderate, this wouldn't be possible. If what I suspect is true, would not the coax also need to be scaled? Dunno. What do you suspect? Roy Lewallen, W7EL |
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