Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2005-07-12
2008-09-16
Takaoka, Dean O (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S101000
Reexamination Certificate
active
07425876
ABSTRACT:
An object of the present invention is to provide an antenna switch circuit that effectively reduces signal leakages at a cross point even at higher operating frequencies and a high frequency module containing said antenna switch module. The antenna switch circuit comprises: a high frequency signal line to transmit a transmitting signal to be input to transmitting terminals to an antenna terminal and also to transmit a receiving signal to be input to the antenna terminal to receiving terminals; switches that are connected in the middle of the high frequency signal line between transmitting terminal and antenna terminal; switches that are connected in the middle of the high frequency signal line between receiving terminal and antenna terminal; and signal lines to transmit control signals for controlling turning on and off of the switches.
REFERENCES:
patent: 6653697 (2003-11-01), Hidaka et al.
patent: 7199635 (2007-04-01), Nakatsuka et al.
patent: 10-178305 (1998-06-01), None
Nakajima Akishige
Ogawa Takashi
Shigeno Yasushi
Takatani Shinichiro
Tange Eigo
Miles & Stockbridge P.C.
Renesas Technology Corp.
Takaoka Dean O
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