System for compensating for cross polarization coupling

Details System for compensating for cross polarization coupling System for compensating for cross polarization coupling

1977-11-15

1979-03-27

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

325 65, 343100ST, H01Q 2124

Patent

active

041468937

ABSTRACT:
A system for compensating for cross polarization coupling in a dual-polarization satellite communication system, in which two polarized waves of the same frequency and orthogonal to each other are alternately transmitted as a pilot wave from an earth station at a predetermined period. The same polarized wave components of the two signals received by a communication satellite are sent back to the earth station, so that the sent back signal is received by the earth station. An amplitude ratio and a phase difference between the same polarized wave components of the two signals of the received pilot signal are detected. A communication signal wave to be transmitted from the earth station is formed as an elliptically polarized wave by the use of the detected information, thereby compensating for cross polarization coupling of the communication signal wave caused during propagation between the earth station and the communication satellite.

REFERENCES:
patent: 3500207 (1970-03-01), Ruthroff
patent: 3735266 (1973-05-01), Amitay
patent: 3986123 (1976-10-01), Tirro et al.

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