发明名称 |
ANTENNA DEVICE, DEMODULATING DEVICE AND RECEIVING DEVICE |
摘要 |
An antenna device that is placed adjacent to an antenna 5 for receiving a high frequency signal and includes an impedance matching circuit 6 and an amplifying circuit 21 to which a DC control voltage is supplied from a demodulating device 3 through a feeder cable 4 for transmitting the high frequency signal to the demodulating device 3, wherein the DC control voltage is set to a value for adjusting a frequency characteristic of the impedance matching circuit 6 within an allowable range corresponding to a received frequency. A small and inexpensive antenna device having a simple circuit configuration and good reception sensitivity is implemented.
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申请公布号 |
US2009245425(A1) |
申请公布日期 |
2009.10.01 |
申请号 |
US20090409189 |
申请日期 |
2009.03.23 |
申请人 |
FUJITSU TEN LIMITED |
发明人 |
TSUTSUI KOHICHI;HASEGAWA SUSUMU;TAKAYAMA KAZUO;KAWAI KENJI;NAKANO MANSAKU;MIYOSHI ERI |
分类号 |
H04L25/06;H01Q1/50;H04B1/06 |
主分类号 |
H04L25/06 |
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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