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11. 发明申请

US20070093219A1 Mobile communication terminal 审中-公开
标题翻译：移动通信终端
公开(公告)号：US20070093219A1
公开(公告)日：2007-04-26
申请号：US10578998
申请日：2004-12-03
申请人： Mitsuharu Nakasato , Satoru Watanabe
发明人： Mitsuharu Nakasato , Satoru Watanabe
IPC分类号： H04B1/04 , H01Q11/12
CPC分类号： H01Q1/242 , H01Q3/28 , H01Q23/00 , H04B1/04
摘要： An object of the invention is to make it possible to maintain the communication quality good without reducing the transmission power of an antenna if a part of a human body comes in contact with or is brought close to the antenna. A transmitter 21 of a mobile communication terminal 1 is made up of a power amplifier 211 and a phase shifter 212 connected between an antenna 10 and the power amplifier 211. The impedance of the antenna 10 in a free space is previously matched to the output load impedance at the time of low output power of the power amplifier 211 and if the head, a finger, etc., touches the antenna 10 and the impedance increases, the phase shifter 212 changes the impedance of the antenna 10 to the output load impedance to increase the output power value of the power amplifier 211.
摘要翻译：本发明的目的在于，如果人体的一部分与天线接触或接近天线，则能够在不降低天线的发射功率的情况下保持通信质量良好。移动通信终端1的发射机21由连接在天线10和功率放大器211之间的功率放大器211和移相器212组成。天线10在自由空间中的阻抗预先与功率放大器211的低输出功率时的输出负载阻抗匹配，并且如果头部，手指等接触天线10并且阻抗增加，移相器212将天线10的阻抗改变为输出负载阻抗，以增加功率放大器211的输出功率值。

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