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Old March 10th 07, 09:02 PM posted to rec.radio.amateur.antenna
Dave Dave is offline
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First recorded activity by RadioBanter: Jul 2006
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Default Nominal Impedance of Loop Antenna


"Al" wrote in message
...
Is there a nominal impedance or approximate impedance for a loop antenna?
For example, a dipole is considered 72-ohm, a bevarage 450-ohm. What is a
nominal loops Z?

I have a 4-1/2 foot diameter loop antenna with 12 turns paralled by a
capacitor for the antenna and one additional turn for the pickup coil. The
loop is for the 200 - 500kHz band. About how much is the impedance of such
an antenna? Thanks.

Al



probably a few tenths of an ohm. a full wave single turn loop is about 100
ohms, but very small loops have very small impedances. the reason for the
pickup coil was probably to act as a transformer to bring the impedance seen
by the receiver to a reasonable level.