He says: "Most field strength
meters do not measure the electric but the magnetic component of the
electromagnetic field. But this is no problem because in the far field
of the antenna (where we measure) there is a fixed
relation between the electric and the magnetic field components: E/H=120*pi
ohm=377 ohm"
Then in the final paragraph of the 'Calibration'
section he uses this same equation to convert A/m to V/m in a
near field.
Not that I would want to question an expert, but
I guess the far field issue is something to do with the distance it takes for a
plain wave to form from an antenna and presumably the equation remains
valid, even between the "Helmholtz coils" with the 377ohm
relationship still applicable?
73 Malcolm (G3NZP, near
Gatwick)
