Radio transceiver with impedance matched test port

Details Radio transceiver with impedance matched test port Radio transceiver with impedance matched test port

1995-10-20

1998-01-20

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455 89, 455 90, 343702, H04B 144

Patent

active

057109842

ABSTRACT:
A radio transceiver is provided for wireless communications, having an interface connection that is selectable between either an antenna or a cable interface. The radio transceiver is engaged to the antenna through an impedance matching network which translates the antenna impedance to match that of the radio transceiver. The radio transceiver can, alternately, be connected to external test equipment or performance enhancement equipment through the cable interface. Since the radio transceiver has the same impedance as most external test equipment, the antenna matching network is not required or used when test equipment is connected to the cable interface. In the present invention the cable interface at least partially disconnects the matching network whenever the cable interface is in use. Once the antenna has been disconnected, the impedance of the cable interface matches that of the radio transceiver. Thus, the radio transceiver provides a convenient cable interface that matches the impedance of most test equipment, yet is easily switched to normal transmit/receive operation.

REFERENCES:
patent: 4862182 (1989-08-01), Egashira
patent: 5138329 (1992-08-01), Saarnimo et al.
patent: 5261121 (1993-11-01), Hashimoto
patent: 5577269 (1996-11-01), Ludewig
patent: 5584053 (1996-12-01), Kommrusch et al.

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