Thread: loop antennas
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Old June 19th 12, 04:21 PM posted to rec.radio.amateur.antenna
W5DXP W5DXP is offline
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Default loop antennas

On Tuesday, June 19, 2012 5:35:57 AM UTC-5, J.B. Wood wrote:
As economics professor Peter Morici would say "It isn't all that
complicated."


What a small shielded loop responds to should be easy to demonstrate. We know that a florescent light bulb responds mainly to the electric field because it gets brighter as one moves it from the feedpoint to the top of a mobile antenna. The standing wave voltage loop is at the top of a resonant mobile antenna. The standing wave current loop is at the feedpoint of a resonant mobile antenna.

So simply take the small shielded loop and see where it responds the best up and down a mobile antenna. If some people are correct about it responding mainly to the magnetic field, the measured field strength will be highest at the base of the mobile antenna where the standing wave current is the highest.
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73, Cecil, w5dxp.com