"art" wrote
Tho the antenna covers little area apurture is covered by gain, the loop
with its inherrant gapaqcitive positioning creates an electric field that
extends beyond its physical shape. You see this effect in a mobile when the
audio increases as you drive by
power lines and the like.
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More likely it is due to the collection and re-radiation of fields by nearby
conductors, so as to increase the net field arriving at the mobile antenna.

RF