Patent ID: 7902944

Claim:
A stacked resonator comprising: a first conductor group having a plurality of conductor lines in a stacking arrangement, one end of each of the plurality of conductor lines being configured as a short-circuit end, and the other end thereof being configured as an open end; and a second conductor group having a plurality of other conductor lines in a stacking arrangement so as to be alternately provided opposing to the plurality of conductor lines in the first conductor group, such that one end of each of the plurality of conductor lines in the second conductor group is opposed to the open ends of the plurality of conductor lines in the first conductor group and is configured as a short-circuit end and the other end of each of the plurality of other conductor lines in the second conductor group is opposed to the short-circuit ends of the plurality of conductor lines in the first conductor group and is configured as an open end, thereby establishing an interdigital-coupling together with the first conductor group, wherein the plurality of conductor lines in the first conductor group are electrically in direct conduction to each other by a conductor at positions other than the short-circuit ends of the plurality of conductor lines in the first conductor group; the plurality of other conductor lines in the second conductor group are electrically in direct conduction to each other by a conductor at positions other than the short-circuit ends of the plurality of other conductor lines in the second conductor group; the first conductor group is regarded in whole as one resonator, the second group is regarded in whole as another resonator, and as a whole a pair of mutually interdigital-coupled resonators is formed; with respect to a resonance frequency f 0 in each of the one and another resonators when establishing no interdigital-coupling, the pair of resonators have a first resonance mode that resonates at a first resonance frequency f 1 higher than the resonance frequency f 0 , and a second resonance mode resonates at a second resonance frequency f 2 lower than the resonance frequency f 0 , and an operating frequency is set as the second resonance frequency f 2 ; and the pair of interdigital-coupled resonators is mutually excited in reversed-phase by the second resonance mode.