Antenna switch for transmit-receive operation using relays and d

Details Antenna switch for transmit-receive operation using relays and d Antenna switch for transmit-receive operation using relays and d

1989-10-20

1991-10-22

Laroche, Eugene R.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455 83, 333101, 333103, 333105, 335 4, H01P 110, H04B 144

Patent

active

050602934

ABSTRACT:
A four port antenna switch (300) for switching a receive port (320) and a transmit port (310) between a remote antenna port (330) and a standard antenna port (340) is provided. The switching actions of the receive port (320) between the remote antenna port (330) and the standard antenna port (340) is provided by a relay (350) under the control of a relay controller (352, 354, 400). The switching of the transmit port (310) between the standard antenna port (340) and the remote antenna port (330) is provided by diode switches (360, 370) under the control of diode switch controllers (332, 324, 312, 314, 400). The switching actions of the relay (350) and the diode switches (370, and 360) is complementary to each other, wherein sufficient isolation between the receive port and the transmit port is provided. In this arrangement, a low power relay may be used because the relay only switches low level received signals, and the high power transmit signals are switched by the pins.

REFERENCES:
patent: 2697207 (1954-12-01), Thompson
patent: 3562597 (1971-02-01), White
patent: 3800222 (1974-03-01), Kowalewski
patent: 3946390 (1976-03-01), Alexander et al.
patent: 4361905 (1982-11-01), Etherington et al.
patent: 4399557 (1983-08-01), Muskiewicz
patent: 4637065 (1987-01-01), Ruppel
patent: 4803447 (1989-02-01), Schultz et al.
patent: 4885799 (1989-12-01), Van Horn

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