I Calculate Diameter of Quad Coil Array for Speed of Light Rotation

[Fluxation]

Thank you. I see what you are saying. But I think you may be overlooking the effects of a contained field. For example in the case of a cubical array made of square coils. For sinusoidal bipolar signals, there is a reciprocally moving field gradient between coil faces.

 

[Baluncore]

For example in the case of a cubical array made of square coils.

The sides of the coils would share the same physical space, they would be inductively coupled, yet would have quadrature currents.

 

[tech99]

The sides of the coils would share the same physical space, they would be inductively coupled, yet would have quadrature currents.

Just to mention the radiation mechanism from this structure. Irrespective of any rotating fields, radiation occurs due to the acceleration of the electrons in the wire. As the electrons are accelerated in the circular path of the wire, radiation is maximum in the plane of the coils. In this direction there is only plane polarisation, being the simple addition of the radiation fields from each coil. If the coils are spaced by a significant part of a wavelength and driven with a phase difference then we will see a directional pattern but still in the plane of the coils and plane polarised.