Title:
無線端末装置
Document Type and Number:
Japanese Patent JP5672098
Kind Code:
B2
Abstract:
A first casing and a second casing movably connected to the first casing are provided. PAs (41ˆ¼43) amplify a transmit signal. FET switches (14ˆ¼16) are provided between the ground and respective transmission paths connecting the Pas (41ˆ¼43) and an antenna (9). When an intermediate voltage is applied, the FET switch (14ˆ¼16) has a capacitance according to the applied intermediate voltage. An open or close detection unit (8) acquires the impedance of the antenna (9) corresponding to the positional relationship of the first casing and the second casing. A control unit (7) turns one of a plurality of switches (11ˆ¼13) ON and applies the intermediate voltage to the FET switches (14ˆ¼16) to achieve a capacitance whereby the impedance of the PA (41ˆ¼43) arranged on the transmission path where the switch is ON and the impedance of the antenna (9) are matched based on the impedance of the antenna (9) acquired by the open or close detection unit (8).
Inventors:
岩井 健二
岸上 一成
工藤 敦
平尾 昌彦
蜂谷 暢英
岸上 一成
工藤 敦
平尾 昌彦
蜂谷 暢英
Application Number:
JP2011061763A
Publication Date:
February 18, 2015
Filing Date:
March 18, 2011
Export Citation:
Assignee:
富士通株式会社
International Classes:
H04B1/04; H03F1/02; H03F3/24; H03F3/68; H03H7/38
Attorney, Agent or Firm:
Hiroaki Sakai