发明名称 |
LOW-LOSS TUNABLE RADIO FREQUENCY FILTER |
摘要 |
A tunable RF filter comprises a signal transmission path having an input and output, a plurality of resonant elements disposed along the signal transmission path between the input and output, and a set of non-resonant elements coupling the resonant elements together to form a stop band having a plurality of transmission zeroes corresponding to respective frequencies of the resonant elements, and at least one sub-band between the transmission zeroes. The set of non-resonant elements comprises a first plurality of non-resonant elements respectively coupled in parallel with the resonant elements, and a second plurality of non-resonant elements respectively coupled in series with the resonant elements. The first plurality of non-resonant elements comprises at least one variable non-resonant element for selectively introducing at least one reflection zero within the stop band to create a pass band in one of the one sub-band(s) without varying any of the second plurality of non-resonant elements. |
申请公布号 |
WO2009003190(A1) |
申请公布日期 |
2008.12.31 |
申请号 |
WO2008US68677 |
申请日期 |
2008.06.27 |
申请人 |
SUPERCONDUCTOR TECHNOLOGIES, INC.;TSUZUKI, GENICHI;WILLEMSEN, BALAM A. |
发明人 |
TSUZUKI, GENICHI;WILLEMSEN, BALAM A. |
分类号 |
H01P1/20 |
主分类号 |
H01P1/20 |
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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