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Wimpie[_2_] · November 10th 14, 11:00 PM posted to rec.radio.amateur.antenna

El 10-11-14 19:39, escribió:
wrote:

snip

Jim, I would encourage you to dive into rotating magnetic dipole
radiation.

You mean like in a pulsar?
To be more precise, I mean the radiation with same frequency as pulsar
rotation, of course only present when there is a net magnetic dipole
moment. I am not pointing to the pulsed RF radiation.

For practical electromechanical systems (even in practial vacuo) it is
negligible as (c0)^5 is in the denominator and (2*pi*rev/s)^4 is in
the numerator, but that doesn't mean it isn't present from a
theoretical point of view.

Again, not talking about any "electromechanical system", just a permanet
magnet spining.

That just spinning magnet produces dB/dt, hence an E-field (not
conservative).

Superposition of two quadrature magnetic oscillating dipoles (small
loop antnenas) gives a rotating magnetic dipole field. Such a
quadrature setup can be exchanged by a rotating permanent magnet.

Also implied is the macro level, i.e. a magnet one can hold in one's
hand and velocities well below any relativisitc effects.

I considered non-relativistic velocities only.

--
Wim
PA3DJS
Please remove abc first in case of PM