Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2006-04-04
2006-04-04
Takaoka, Dean (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S101000
Reexamination Certificate
active
07023296
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.
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patent: 6633748 (2003-10-01), Watanabe et al.
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European Search Report for Application EP 01 13 0694 date mailed Jun. 26, 2003.
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
Matsushita Electric - Industrial Co., Ltd.
Takaoka Dean
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