Telecommunications – Carrier wave repeater or relay system – Portable or mobile repeater
Patent
1992-11-12
1994-11-29
Eisenzopf, Reinhard J.
Telecommunications
Carrier wave repeater or relay system
Portable or mobile repeater
455131, 455323, 333 21A, H01P 1165, H04B 7185
Patent
active
053697804
ABSTRACT:
A frequency converter for reception of satellite broadcasting, comprising first to fourth feeding lines, each being disposed perpendicularly to one another and vertically through the center of a patch on which a satellite signal with polarized wave components is electromagnetically focused, to allow vertically and horizontally polarized waves of the satellite signal to be excited thereat, first through fourth first-stage low noise amplifiers connected, respectively, to the first through fourth feeding lines, for blocking or transferring the vertically and horizontally polarized wave signals excited at the first through fourth feeding lines in response to a reception selection control, first and second phase shifters connected, respectively, to outputs of the first and second first-stage amplifiers, for shifting the vertically and horizontally polarized wave signals by a desired phase in response to the reception selection control, respectively, so that left and right circularly polarized waves can be generated, and a signal mixing circuit for mixing an output signal from the first phase shifter with an output signal from the fourth first-stage amplifier and an output signal from the second phase shifter with an output signal from the third First-stage amplifier, mixing the mixed signals again and second-stage amplifying the again-mixed signal.
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Article "Antenna Systems for ESM Applications--A Land Mobile Example", by R. J. Chignell et al, IEEE Proceedings, vol. 132, No. 4, Jul. 1985, pp. 252-256.
Charouel Lisa
Eisenzopf Reinhard J.
Goldstar Co. Ltd.
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