Dielectric filter and dielectric duplexer each having a plurality of dielectric resonators connected in series by a dielectric coupling window
Patent 6002306 Issued on December 14, 1999. Estimated Expiration Date: 
January 26, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 26, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMicrowave filter Branching filter Patent #: 4910481 InventorAssigneeApplicationNo. 013666 filed on 01/26/1998US Classes:333/134, Utilizing long line element333/202Wave filters including long line elementsExaminersPrimary: Ham, SeungsookAttorney, Agent or FirmForeign Patent References
International ClassesH01P 005/12H01P 007/10 Foreign Application Priority Data1997-01-24 JPAbstractA dielectric filter is formed of resonators connected in series with dielectric coupling windows disposed therebetween. When the dielectric constant of the dielectrics which form the dielectric coupling windows is made different from that of the dielectrics which form the resonators, dielectric filter having the same central frequency and a different pass-band width is obtained without changing the shape and dimensions of the dielectric coupling windows. | |
