发明名称 |
FILTER WITH IMPROVED INTERMODULATION DISTORTION CHARACTERISTICS AND METHODS OF MAKING THE IMPROVED FILTER |
摘要 |
<p>Multi-stage electric filters with improved intermodulation-distortion characteristics and a method for designing such electric filters is provided. In general, the invention may include a multi-resonator electric filter in which one or more of the resonators have been intentionally designed to have a different IP and/or Q than the other resonators in the electric filter. In one case, the electric filters include a 4-resonator Chebyshev narrow pass-band filter with at least the first resonator having a Q and/or IP different from at least one other resonator in the filter. The filter thereby has improved IMD power over conventional designed filters while maintaining high Q. In a preferred embodiment the filter may include a superconducting material. The relative Q and IP of the respective resonators in the improved filter may depend on the relative strength of in-band and out-of-band signals. The performance and cost of the electric filter may be optimized by designing the filter to have a relative Q and IP required by the particular application.</PTEXT></p> |
申请公布号 |
EP1405364(B1) |
申请公布日期 |
2009.03.18 |
申请号 |
EP20020744187 |
申请日期 |
2002.05.28 |
申请人 |
SUPERCONDUCTOR TECHNOLOGIES INC. |
发明人 |
SALKOLA, MARKKU, I.;HAMMOND, ROBERT, B.;FENZI, NEAL |
分类号 |
H01P1/20;H01P1/203 |
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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