Antenna system with automatic depolarization correction

Details Antenna system with automatic depolarization correction Antenna system with automatic depolarization correction

1976-06-30

1977-11-29

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

333 21A, H04B 700

Patent

active

040608085

ABSTRACT:
A spectrum reuse antenna system is described for transmitting orthogonally polarized RF waves at one frequency band to a satellite and for receiving orthogonally polarized RF waves from a satellite at a second frequency band through a common antenna. A local generator provides a first control signal which varies as a function of the typical rotation of the polarization of a transmitted wave at the one frequency band travelling through the ionosphere. The local generator also provides a second control signal which varies as a function of the typical rotation of the polarization of a received wave at the second frequency band travelling through the ionosphere. A driven means responsive to the first control signal causes a rotation of the polarization of the transmitted waves to correct for Faraday rotation in the ionosphere and a driven means responsive to the second control signal causes rotation of the polarization angle of the antenna system for the received waves to correct for the Faraday rotation.

REFERENCES:
patent: 3728643 (1973-04-01), Chu
patent: 3768039 (1976-11-01), Ohm
patent: 3914764 (1975-10-01), Ohm
Vogt, An Analogue Polarization Follower for Measuring the Faraday Rotation of Satellite Signals, The Radio & Electronic Engineer, Oct. 1964.

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