Polarization converter application for accessing linearly polarized satellites with single- or dual-circularly polarized earth station antennas
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United States of America Patent
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Feb 4, 1992
Grant Date -
N/A
app pub date -
Jan 10, 1990
filing date -
Jan 10, 1990
priority date (Note) -
Expired
status (Latency Note)
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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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