High-frequency circuit device

Details High-frequency circuit device High-frequency circuit device

2007-09-11

2007-09-11

Urban, Edward F. (Department: 2618)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C370S337000, C370S347000, C455S127300, C455S339000, C455S552100, C330S133000

Reexamination Certificate

active

11056467

ABSTRACT:
A high-frequency circuit device is provided that is conformable to both of the TDMA system and the CDMA system as well as a plurality of frequency bands and achieves low cost and low power consumption. The high-frequency circuit device has a configuration including a transmission amplifier circuit for transmitting high-frequency power from an antenna that is composed of a high-frequency amplifier that is shared in the TDMA system and the CDMA system, a duplexer that is provided for performing simultaneous transmission/reception according to the CDMA system, upstream and downstream switch circuits in the direction of transmission that are provided so as to sandwich the duplexer between the transmission amplifier circuit and the antenna and are switched on when the simultaneous transmission/reception is performed according to the CDMA system, and a bypass switch circuit that bypasses the upstream and downstream switch circuits and the duplexer.

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Japanese Office Action for the corresponding Japanese application 2004-041935, mailed Oct. 26, 2006.

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