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1. 发明授权

US06633208B2 Filter with improved intermodulation distortion characteristics and methods of making the improved filter 有权
标题翻译：滤波器具有改进的互调失真特性和制作改进滤波器的方法
公开(公告)号：US06633208B2
公开(公告)日：2003-10-14
申请号：US09886768
申请日：2001-06-19
申请人： Markku I. Salkola , Robert B. Hammond , Neal Fenzi
发明人： Markku I. Salkola , Robert B. Hammond , Neal Fenzi
IPC分类号： H01P701
CPC分类号： H01P1/20381 , H01P1/20 , Y10S505/70 , Y10S505/866
摘要： 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.
摘要翻译：提供了具有改进的互调失真特性的多级电滤波器和用于设计这种滤波器的方法。通常，本发明可以包括多谐振器电滤波器，其中一个或多个谐振器被有意设计成具有与电滤波器中的其它谐振器不同的IP和/或Q。在一种情况下，电滤波器包括4谐振器Chebyshev窄通带滤波器，至少第一谐振器具有与滤波器中的至少一个其它谐振器不同的Q和/或IP。因此，过滤器相对于常规设计的过滤器具有改善的IMD功率，同时保持高Q。在优选实施例中，过滤器可以包括超导材料。改进滤波器中相应的谐振器的相对Q和IP可以取决于带内和带外信号的相对强度。可以通过将滤波器设计为具有特定应用所需的相对Q和IP来优化电滤波器的性能和成本。

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