Multi-ceramic layer switch circuit

Details Multi-ceramic layer switch circuit Multi-ceramic layer switch circuit

1995-03-20

1996-04-30

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455 82, 333103, 333104, 333246, H04B 144

Patent

active

055133827

ABSTRACT:
A switch circuit for a cellular radiotelephone operable in a TDMA communication scheme. The switch circuit is disposed upon a plurality of tandemly-positioned ceramic substrates having transmission lines disposed upon one of the ceramic substrates. The switch circuit alternately connects transmitter circuitry to an antenna or receiver circuitry to the antenna, thereby alternately to permit transmission or reception of signals generated by, or received by the radiotelephone. Because circuits disposed upon ceramic materials are of low insertion losses, the switch circuit is advantageously utilized to form a portion of the radiotelephone.

REFERENCES:
patent: 3475700 (1969-10-01), Ertel
patent: 4701724 (1987-10-01), Martin
patent: 5023935 (1991-06-01), Vancraeynest
Wallington, J. R., "Microstrip switching using P-I-N diodes", GEC Journal of Science and Technology, vol. 43, No. 3, 1977.
Unitrode Corporation Databook, copyright 1984, pp. 49-53.

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