发明名称 |
Circuit to test the working of at least one antenna |
摘要 |
A circuit to test the working of antennas for a radio telephone. The antennas each have a radiator with one end that open rises up into the space. The test currents flow through antenna wires to the antennas independent of a signal current (IRF). A secondary path with an impedance that is parallel to the RF path is connected to each radiator to return the separate test currents. A voltage evaluator monitors the operating state of the antennas by comparing the test voltages induced by the test currents at the antenna connections with a reference value and generates corresponding indication signals that provide information on the operating state of the antennas.
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申请公布号 |
US6437577(B1) |
申请公布日期 |
2002.08.20 |
申请号 |
US20000575440 |
申请日期 |
2000.05.22 |
申请人 |
NOKIA MOBILE PHONES LTD. |
发明人 |
FRITZMANN MARTIN;WAGNER THOMAS |
分类号 |
H01Q1/32;H01Q3/26;(IPC1-7):G01R31/08 |
主分类号 |
H01Q1/32 |
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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