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Roy Lewallen · March 11th 09, 07:56 PM posted to rec.radio.amateur.antenna

wrote:
Thanks guys... Some of these ideas might work. Sorry, I should have
given more details... It's basically receive antennas in the 1000 MHz
range, and I don't have access to the transmitters that will be used
with them. I'm just trying to find a way to see where they're tuned
and then be able to tune them if they're off. So if I went with an SWR
meter, maybe there's an easy way to generate a signal to use that? I
have an Autek that goes to 500 MHz. Somebody mentioned using a
frequency doubler, but I'm not sure how that would work.

If you know the antenna impedance at resonance is tolerable, then SWR is
adequate. If you'll need to design a matching network, though, you'll
need to know separate R and X components, so you'd need a network
analyzer or equivalent.

Have you ever calculated how much signal loss occurs as a result of
mismatch? You might find you're wasting your time bothering with it.

Roy Lewallen, W7EL