Communications: directive radio wave systems and devices (e.g. – With particular circuit – With polarization
Patent
1990-01-10
1992-02-04
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
With polarization
342361, 343756, H01Q 2124
Patent
active
050863010
ABSTRACT:
A single- or dual-circularly polarized earth station antenna is converted into a single- or dual-linearly polarized earth station antenna for accessing linearly polarized satellites. In a first embodiment, a free-space meander line polarizer providing a 90.degree. differential phase shift between two orthogonal polarizations is disposed in front of the earth station antenna feed system. In a second embodiment, a power dividing (transmit) or power combining (receive) network operates in conjunction with differential phase shift circuits to achieve the polarization conversion.
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English William J.
Viskum Hans H.
Hellner Mark
Intelsat
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