发明授权
- 专利标题： Wireless communication RF circuit and communication apparatus including the same
- 专利标题（中）： 无线通信RF电路和包括其的通信设备
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申请号： US10497513申请日： 2003-04-23
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公开(公告)号： US07133641B2公开(公告)日： 2006-11-07
- 发明人: Tsutomi Ieki , Yoshihiro Yamaguchi
- 申请人： Tsutomi Ieki , Yoshihiro Yamaguchi
- 申请人地址： JP Kyoto
- 专利权人： Murata Manufacturing Co., Ltd.
- 当前专利权人： Murata Manufacturing Co., Ltd.
- 当前专利权人地址： JP Kyoto
- 代理机构： Keating & Bennett, LLP
- 优先权： JP2002-121038 20020423
- 国际申请： PCT/IB03/01651 WO 20030423
- 国际公布： WO03/092182 WO 20031106
- 主分类号： H04B7/00
- IPC分类号： H04B7/00 ; H04B1/40 ; H04Q5/22
摘要：
A wireless communication RF circuit includes a transmitting-and-receiving antenna, a modulator circuit, an SPST switching circuit, and a demodulator circuit, which are arranged in a sequence. Upon signal reception, the SPST switching circuit is switched ON, and the demodulator circuit extracts a signal wave from a signal received by the antenna and outputs the signal wave to a control circuit. Upon signal transmission, the SPST switching circuit is switched OFF, and the modulator circuit mixes transmission data supplied from the control circuit with a carrier and outputs the carrier to the antenna. Only a single antenna is required. Upon signal reception, the influence of the modulator circuit is negligible. Upon signal transmission, the SPST switching circuit is switched OFF, thus the effect of the demodulator circuit is negligible, which greatly reduces loss.