发明名称 |
HIGH-FREQUENCY SWITCH, HIGH-FREQUENCY SWITCH MODULE, AND WIRELESS COMMUNICATION DEVICE |
摘要 |
A high-frequency switch circuit common to a plurality of frequency bands comprises a first high-frequency switch connected to first high-frequency signal input and output terminals and adapted to pass transmission signals of a first or a second frequency band and block received signals of the first and second frequency band; and a demultiplexer has a first high-frequency circuit which consists of a first phaser connected to the first terminal and a first bandpass filter succeeding to the first phaser, and a second high-frequency circuit which consists of a second phaser connected to the first terminal and a second bandpass filter succeeding to the second phaser. The transmission line in the first phaser has a line length such that the input impedance of the first high-frequency circuit is substantially open in the pass band of the second bandpass filter, whereas the transmission line in the second phaser has a line length such that the input impedance of the second high-frequency circuit is substantially open in the pass band of the first bandpass filter. Thus, the high-frequency switch circuit passes one of the received signals of the first and second frequency bands and blocks the other.
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申请公布号 |
WO0148935(A1) |
申请公布日期 |
2001.07.05 |
申请号 |
WO2000JP09435 |
申请日期 |
2000.12.28 |
申请人 |
HITACHI METALS, LTD.;KEMMOCHI, SHIGERU;WATANABE, MITSUHIRO;TAKETA, TSUYOSHI;TAI, HIROYUKI |
发明人 |
KEMMOCHI, SHIGERU;WATANABE, MITSUHIRO;TAKETA, TSUYOSHI;TAI, HIROYUKI |
分类号 |
H01P1/15;H04B1/40;H04B1/48;(IPC1-7):H04B1/44;H03H7/46 |
主分类号 |
H01P1/15 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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