Patent ID: 8618894
Filing Date: 2013-12-31
Classification: H01P

Abstract:
1. A multi-mode resonant filter, comprising: a housing comprising a cavity therein; a Dielectric Resonant (DR) element configured to be received in the housing, the DR element forming at least three resonant modes in different directions; a first transmission line aligned along a first direction in which a first resonant mode among the at least three resonant modes is formed; a second transmission line aligned along a second direction in which a second resonant mode among the at least three resonant modes is formed, the second resonant mode being different from the first resonant mode; and a third transmission line aligned along a third direction in which a third resonant mode among the at least three resonant modes is formed, the third resonant mode being different from the first resonant mode and the second resonant mode, wherein the first transmission line, the second transmission line, and the third transmission line couple the first resonant mode, the second resonant mode, and the third resonant mode; the first, second, and third transmission lines each comprise first and second ends and one of the first and second ends of at least one of the first transmission line, the second transmission line, and the third transmission line is directly connected to one of the first and second ends of another one of the first transmission line, the second transmission line, and the third transmission line.