Stacked resonator

Abstract

Provided are a stacked resonator capable of achieving miniaturization and minimum loss, and a stacked resonator capable of suppressing any unnecessary resonance mode due to interdigital-coupling. The stacked resonator includes a first conductor group having a plurality of conductor lines in a stacking arrangement, 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 conductor lines in the first conductor group, thereby establishing an interdigital-coupling together with the first conductor group.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an explanatory drawing illustrating a basic configuration of a stacked resonator according to a first embodiment of the present invention;

FIG. 2 is a perspective view illustrating a specific configuration example of the stacked resonator in the first embodiment;

FIG. 3 is an explanatory drawing illustrating a first resonance mode of a pair of interdigital-coupled quarter-wave resonators;

FIG. 4 is an explanatory drawing illustrating a second resonance mode of the pair of interdigital-coupled quarter-wave resonators;

FIGS. 5A and 5B are explanatory drawings illustrating an electric field distribution in an odd mode in transmission modes of a coupling transmission line of bilateral symmetry, and an electric field distribution in an even mode, respectively;

FIGS. 6A and 6B are explanatory drawings illustrating the structure of a transmission line equivalent to the coupling transmission line of bilateral symmetry, FIGS. 6A and 6B illustrating an odd mode and an even mode in the equivalent transmission line, respectively;

FIG. 7 is an explanatory drawing illustrating a distribution state of resonance frequency in the pair of interdigital-coupled quarter-wave resonators;

FIGS. 8A and 8B are a first explanatory drawing and a second explanatory drawing illustrating a magnetic field distribution in the pair of interdigital-coupled quarter-wave resonators, respectively;

FIG. 9 is a structural drawing illustrating an example of the dimension of a resonator structure using only one quarter-wave resonator;

FIG. 10 is a structural drawing illustrating an example of the dimension of a resonator structure using two quarter-wave resonators as a whole;

FIG. 11 is a structural drawing illustrating an example of the dimension of a resonator structure using six quarter-wave resonators as a whole;

FIG. 12 is an explanatory drawing illustrating a basic configuration of a stacked resonator according to a second embodiment of the present invention;

FIGS. 13A and 13B are explanatory drawings illustrating a connecting position between conductors in the stacked resonator of the second embodiment;

FIG. 14 is a perspective view illustrating a first specific configuration example of the stacked resonator in the second embodiment;

FIG. 15 is an exploded perspective view illustrating the first specific configuration example of the stacked resonator in the second embodiment;

FIG. 16 is a perspective view illustrating a second specific configuration example of the stacked resonator in the second embodiment;

FIG. 17 is an exploded perspective view illustrating the second specific configuration example of the stacked resonator in the second embodiment;

FIG. 18 is an explanatory drawing illustrating a current distribution in a resonance mode on a low frequency side in the stacked resonator of the second embodiment;

FIG. 19 is an explanatory drawing illustrating an unnecessary signal path suppressed by the stacked resonator in the second embodiment;

FIG. 20 is an explanatory drawing illustrating an example of a current distribution in a resonance mode on a high frequency side suppressed by the stacked resonator of the second embodiment;

FIG. 21 is an explanatory drawing illustrating another example of the current distribution in the resonance mode on the high frequency side suppressed by the stacked resonator in the second embodiment;

FIG. 22 is an explanatory drawing illustrating an equivalent line structure in the resonance mode on the high frequency side suppressed by the stacked resonator of the second embodiment;

FIG. 23 is a diagram illustrating schematically the structure of a comb-line coupled resonators; and

FIGS. 24A and 24B are first and second explanatory drawings illustrating magnetic field distributions in two comb-line coupled resonators, respectively.

Claims

1. A stacked resonator comprising: a first conductor group having a plurality of conductor lines in a stacking arrangement, one end of each of the conductor lines being configured as a short-circuit end, and the other end thereof being configured as an open end; anda second conductor group having a plurality of other conductor lines in a stacking arrangement so as to be alternately provided opposing to the conductor lines in the first conductor group, such that one end of each of the conductor lines in the second conductor group is opposed to the open ends of the conductor lines in the first conductor group and is configured as a short-circuit end and other end of each of the conductor lines in the second conductor group is opposed to the short-circuit ends of the 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.

2. The stacked resonator according to claim 1, wherein the conductor lines in the first conductor group are in conduction to each other at positions other than the short-circuit ends of the conductor lines in the first conductor group; andthe conductor lines in the second conductor group are in conduction to each other at positions other than the short-circuit ends of the conductor lines in the second conductor group.

3. The stacked resonator according to claim 2, wherein the positions where the conductor lines in the first conductor group are in conduction to each other are located between the central positions of the conductor lines exclusive and the open ends inclusive; andthe positions where the conductor lines in the second conductor group are in conduction to each other are located between the central positions of the conductor lines exclusive and the open ends inclusive.

4. The stacked resonator according to claim 2, comprising: a first through-hole bringing the conductor lines in the first conductor group into conduction to each other; anda second through-hole bringing the conductor lines in the second conductor group into conduction to each other.

5. The stacked resonator according to claim 2, comprising: a first connecting terminal used to bring the conductor lines in the first conductor group into conduction to each other; anda second connecting terminal used to bring the conductor lines in the second conductor group into conduction to each other.