Patent ID: 7548141
Filing Date: 2009-06-16
Classification: H01P

Abstract:
1. A high frequency filter comprising: a layered substrate including dielectric layers and conductor layers that are alternately stacked; a first resonator and a second resonator that are formed of part of the conductor layers inside the layered substrate and that are inductively coupled to each other; at least one pair of first and second electrodes that are formed of part of the conductor layers inside the layered substrate and that capacitively couple the first and second resonators to each other; at least one first through hole provided inside the layered substrate and connecting the first electrode to one of the first and second resonators; and at least one second through hole provided inside the layered substrate and connecting the second electrode to the other of the first and second resonators, wherein the first and second electrodes are opposed to each other, one of the dielectric layer inside the layered substrate being disposed between the first and second electrodes.