Topband: Apparent Multiple Resonances on a single antenna

[Bill Turner]

On Tue, 06 Jan 2004 20:51:36 +0500, Bill wrote:

>For instance, I found almost a 1:1 match on 71.29mhz and other close
>matches
>as I moved down to 160m.  How is this possible and where is this coming
>from?

_________________________________________________________

This is normal behavior for nearly all antennas.  A simple half-wave
dipole is resonant at its fundamental frequency and also at all of the
odd-numbered harmonics (3rd, 5th, 7th, etc).  Forty meter dipoles are
commonly used on 15 meters, for example.  The radiation pattern is quite
different of course, but still usable.

Both the ARRL Handbook and Antenna Handbook have a good discussion of
the phenomenon.

--
Bill, W6WRT