I notice that the book "LF Today" put out by Alex Dennison, g3xdv
appears to have missed a parameter its loop radiation resistance
formula as stated on page 83
Rr = 320 * (pi**4) * A*A/(Wavelength**2)
This equation does not scale with wavelength even if the area  A
is scaled proportionately with the Wavelength.  I believe this should be
Rr = 320 * (pi**4) * A*A/(Wavelength**4)
This can be simplified (for circular loops of diameter D)
Rr = 17228. * ((D/Wavelength)**4)
and this equation gives answers which agree with published data elsewhere.
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