It's called tuning your antenna with your feedline. See
http://www.qsl.net/w5dxp/notuner.htm
Ed wrote:
> Actually, with a little extra work, it can become a lot easier than
>
>using one antenna. I recently completed work on a VB6 project which
>will counteract the phase differential between a load and presumably
>50 ohm coax.
>
>If an antenna switch could be wired in such a manner that there are
>1 "hot" input, but that input is tied to 2 more separate inputs, you
>can have a pretty close to 1:1 SWR wherever you choose.
>
>All that is required is to switch in a certain length of coax or
>other feed line to switch the same antenna to another portion of the
>band.
>
>Actually, same thing goes for all bands.
>
>73
>Ed
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