Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2005-03-15
2005-03-15
Pascal, Robert (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S101000, C333S193000
Reexamination Certificate
active
06867662
ABSTRACT:
A high-frequency switch hasa first transmission-reception switching circuit for selectively switching between the signal transfer between an antenna terminal and a first transmitting-circuit terminal and the signal transfer between the antenna terminal and a first receiving-circuit terminal;a second transmission-reception switching circuit for selectively switching between the signal transfer between the antenna terminal and a second transmitting-circuit terminal and the signal transfer between the antenna terminal and a second receiving-circuit terminal;a first diplexer disposed between the antenna terminal and the first transmission-reception switching circuit and between the antenna terminal and the second transmission-reception switching circuit; anda second diplexer connected to the second receiving-circuit terminal to selectively switch the signal transfer between the second receiving-circuit terminal and a third receiving-circuit terminal and the signal transfer between the second receiving-circuit terminal and a fourth receiving-circuit terminal by using a phase-shifting circuit and a surface-acoustic-wave filter.
REFERENCES:
patent: 3768043 (1973-10-01), Foldes
patent: 5933770 (1999-08-01), Heiter
patent: 6388537 (2002-05-01), Matsumoto
patent: 1 003 291 (2000-05-01), None
patent: 1 014 592 (2000-06-01), None
patent: 2000-165274 (2000-06-01), None
Communication Pursuant to Article 115(2) EPC for European Patent Application 01130694.1 (EP-A2-1223634), dated Feb. 11, 2004.
Iwasaki Tomoyuki
Uriu Kazuhide
Yamada Toru
Pascal Robert
Takaoka Dean
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