Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2005-12-06
2005-12-06
Takaoka, Dean (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S109000
Reexamination Certificate
active
06972640
ABSTRACT:
A directional coupler for detecting an output of a high frequency circuit module includes a main line and a sub-line overlapped with the main line with a dielectric material. The sub-line is set, in width, narrower than the main line and both side edges of the sub-line are allocated at the internal side of both side edges of the main line. Accordingly, the sub-line is surely provided opposed to the main line in the total width area and a signal current flowing into the main line can be detected in higher accuracy. Therefore, a wireless communication system for controlling an output of the high frequency circuit module by including such directional coupler assures stable communication.
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Akamine Hitoshi
Arai Satoshi
Imai Shun
Nagamori Hiroyuki
Nunogawa Yasuhiro
A. Marquez, Esq. Juan Carlos
Fisher Esq. Stanley P.
Hitachi ULSI Systems Co. Ltd.
Reed Smith LLP
Renesas Technology Corporation
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