公开(公告)号：EP1405364A4

公开(公告)日：2004-07-28

申请号：EP02744187

申请日：2002-05-28

申请人： SUPERCONDUCTOR TECH

发明人： SALKOLA MARKKU I ,  HAMMOND ROBERT B ,  FENZI NEAL

IPC分类号： H01P1/20 ,  H01P1/203

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 (1105) having a Q and/or IP different from at least one other resonator (1110) 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： 提供具有改善的互调失真特性的多级电滤波器和用于设计这种电滤波器的方法。 通常，本发明可以包括多谐振器电滤波器，其中谐振器中的一个或多个已被有意设计为具有与电滤波器中的其他谐振器不同的IP和/或Q. 在一种情况下，电滤波器包括4谐振器切比雪夫窄通带滤波器，其中至少第一谐振器（1105）具有不同于滤波器中的至少一个其他谐振器（1110）的Q和/或IP。 由此，滤波器具有比常规设计的滤波器更高的IMD功率，同时保持高Q值。在优选实施例中，滤波器可以包括超导材料。 改进的滤波器中各个谐振器的相对Q和IP可能取决于带内和带外信号的相对强度。 电滤波器的性能和成本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。