A simple E-field probe for measuring
near-field radiation (to verify
compliance with FCC limits) is described at:

http://www.kn4s.com/rf.html
RF Safety

(about halfway through the document)

My question is this:

Looking only at the two plates separated
by 10 cm, what is the impedance the
plates would present to a measuring
device in the hf spectrum? Is there a
simple way to calculate (estimate) the
impedance? Is the charging circuit time
constant a simple function of the
resistivity of air?

Ordinarily, a 10 megohm instrument would
load such a probe excessively because
the probe's impedance would be much
higher than 10 megohms.

Many thanks.

Chuck
NT3G

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