发明名称 |
Active antenna system with fault detection |
摘要 |
An active antenna power interface circuit couples a supply voltage from a radio receiver to an antenna feed. The circuit comprises a DC power input and a power switching element connected in series between the DC power input and the antenna feed. The power switching element has a control input for selecting a conducting state or a nonconducting state of the power switching element. A high side voltage sensor senses a first voltage proportional to a voltage at the DC power input. A low side voltage sensor senses a second voltage proportional to a voltage at the antenna feed. A controller is coupled to the control input and to the voltage sensors. The controller places the power switching element into the conducting state, samples the first and second voltages, calculates a voltage difference in response to the first and second voltages, compares the voltage difference to an upper limit and a lower limit. If the voltage difference is greater than the upper limit then the controller signals a short-circuit fault. If the voltage difference is less than the lower limit then the controller signals an open-circuit fault.
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申请公布号 |
US2004116084(A1) |
申请公布日期 |
2004.06.17 |
申请号 |
US20020318418 |
申请日期 |
2002.12.12 |
申请人 |
WARD DENNIS PAUL;ZEROD RICHARD DAVID |
发明人 |
WARD DENNIS PAUL;ZEROD RICHARD DAVID |
分类号 |
H01Q23/00;H04B1/04;H04B1/18;(IPC1-7):H04B1/00 |
主分类号 |
H01Q23/00 |
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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