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<blockquote data-quote="Channel Hopper" data-source="post: 802926" data-attributes="member: 175144">The properties of microwaves are similar to that of light, both being electromagnetic. Since various materials can be used to convert one form into another in the optical spectrum, there should be something similar for the lower wavelengths of signals from satellites.I was working on (number of) Faraday rotator designs back in the early/mid 90's using Gaussian coils (not dissimilar to that used in particle beam technology) to focus microwaves into the LNB without the use of a scalar plate, but this was at low Ku band (8-11 GHz). The results were measurable, but could not be maintained across the whole spectrum at a fixed voltage.Application efficiency was offset by the use of energy in keeping the current flowing as well, which meant it was also uneconomical when compared to&nbsp; - say - adding a few extra panels onto the dish.In a similar vein the ferrite polarisers (horrible lossy things) that were used throughout the 90's on satellite equipment required adjustment at each frequency received by the receivers tuner. Coil technology means the equipment remains outside the direct path of the incoming microwaves (at least on an offset dish) and so the direct loss to the incoming signal is zero. If you search for gyrotropic waveguide or permittivity you might find something of value, the following should start you off though_http://www.sccs.swarthmore.edu/users/08/ajb/tmve/wiki100k/docs/Magneto-optic_effect.html</blockquote>

[QUOTE="Channel Hopper, post: 802926, member: 175144"] The properties of microwaves are similar to that of light, both being electromagnetic. Since various materials can be used to convert one form into another in the optical spectrum, there should be something similar for the lower wavelengths of signals from satellites. I was working on (number of) Faraday rotator designs back in the early/mid 90's using Gaussian coils (not dissimilar to that used in particle beam technology) to focus microwaves into the LNB without the use of a scalar plate, but this was at low Ku band (8-11 GHz). The results were measurable, but could not be maintained across the whole spectrum at a fixed voltage. Application efficiency was offset by the use of energy in keeping the current flowing as well, which meant it was also uneconomical when compared to - say - adding a few extra panels onto the dish. In a similar vein the ferrite polarisers (horrible lossy things) that were used throughout the 90's on satellite equipment required adjustment at each frequency received by the receivers tuner. Coil technology means the equipment remains outside the direct path of the incoming microwaves (at least on an offset dish) and so the direct loss to the incoming signal is zero. If you search for gyrotropic waveguide or permittivity you might find something of value, the following should start you off though _http://www.sccs.swarthmore.edu/users/08/ajb/tmve/wiki100k/docs/Magneto-optic_effect.html [/QUOTE]

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