Tunable dual-band resonator

Patent metadata

Field	Value
Publication number	US-10629974-B2
Application number	US-201815956112-A
Country	US
Kind code	B2
Filing date	Apr 18, 2018
Priority date	Dec 9, 2014
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

A tunable dual-band resonator and a tunable dual-band band-pass filter using the tunable dual-band resonator. The dual-band resonator is structured such that a stub is added to each half-wavelength resonator provided with half-wavelength resonator protrusions (capacity-component adjust parts). The dual-band resonator is made up of an odd-number mode resonator in a shape including a ground conductor disposed on the back surface of a dielectric body, and a strip conductor disposed on the top surface thereof, and an even-number mode resonator in such a shape as to be formed when the stub is connected to an end face on the opposite side of the open-end of the strip, characterized in that a dielectric rod having a circular cross section is provided in the space above the respective stubs and another dielectric rod having a circular cross section is provided in the space above the half-wavelength resonator protrusions.

First claim

What is claimed is:

1. A tunable dual-band resonator operating in two frequency-bands due to resonance in an odd-mode and resonance in an even-mode,
the tunable dual-band resonator comprising:
a ground conductor;
a dielectric body situated over the ground conductor; and
a strip conductor situated over the dielectric body,
the strip conductor comprising:
a half-wavelength resonator having a pair of portions which are arranged oppositely; and
a stub coupled with the half-wavelength resonator,

wherein the ground conductor, the dielectric body and the strip conductor form a micro strip-line structure, each of the pair of portions of the half-wavelength resonator has a protrusion, a dielectric rod is provided above the protrusion of each of the pair of portions of the half-wavelength resonator and the dielectric rod is vertically movable to tune a resonance frequency in the odd-mode and another resonance frequency in the even-mode independently and the protrusion of each of the pair of portions has a stepwise shape in a plan view.

2. A tunable dual-band resonator operating in two frequency-bands due to resonance in an odd-mode and resonance in an even-mode,
the tunable dual-band resonator comprising:
a ground conductor;
a dielectric body situated over the ground conductor; and
a strip conductor situated over the dielectric body,
the strip conductor comprising:
a half-wavelength resonator having a pair of portions which are arranged oppositely; and
a stub coupled with the half-wavelength resonator,

wherein the ground conductor, the dielectric body and the strip conductor form a micro strip-line structure, each of the pair of portions of the half-wavelength resonator has a protrusion, a dielectric rod is provided above the protrusion of each of the pair of portions of the half-wavelength resonator and the dielectric rod is vertically movable to tune a resonance frequency in the odd-mode and another resonance frequency in the even-mode independently and each of the pair of portions of the half-wavelength resonator has an end portion and another end portion, the stub is connected to the end portion of each of the pair of portions of the half-wavelength resonator and the protrusion of each of the pair of portions is positioned between the corresponding end portion and said corresponding another end portion.

3. A tunable dual-band resonator operating in two frequency-bands due to resonance in an odd-mode and resonance in an even-mode,
the tunable dual-band resonator comprising:
a ground conductor;
a dielectric body situated over the ground conductor; and
a strip conductor situated over the dielectric body,
the strip conductor comprising:
a half-wavelength resonator having a pair of portions which are arranged oppositely; and
a stub coupled with the half-wavelength resonator,

wherein the ground conductor, the dielectric body and the strip conductor form a micro strip-line structure, each of the pair of portions of the half-wavelength resonator has a protrusion, a dielectric rod is provided above the protrusion of each of the pair of portions of the half-wavelength resonator and the dielectric rod is vertically movable to tune a resonance frequency in the odd-mode and another resonance frequency in the even-mode independently and the dielectric rod is comprised of sapphire.

4. A tunable dual-band resonator operating in two frequency-bands due to resonance in an odd-mode and resonance in an even-mode,
the tunable dual-band resonator comprising:
a ground conductor;
a dielectric body situated over the ground conductor; and
a strip conductor situated over the dielectric body,
the strip conductor comprising:
a half-wavelength resonator having a pair of portions which are arranged oppositely; and
a stub coupled with the half-wavelength resonator,

wherein the ground conductor, the dielectric body and the strip conductor form a micro strip-line structure, each of the pair of portions of the half-wavelength resonator has a protrusion, a dielectric rod is provided above the protrusion of each of the pair of portions of the half-wavelength resonator and the dielectric rod is vertically movable to tune a resonance frequency in the odd-mode and another resonance frequency in the even-mode independently and the half-wavelength resonator serves as a resonator in the odd-mode and the half-wavelength resonator and the stub serve as a resonator in the even-mode.

5. A tunable dual-band resonator operating in two frequency-bands due to resonance in an odd-mode and resonance in an even-mode,
the tunable dual-band resonator comprising:
a ground conductor;
a dielectric body situated over the ground conductor; and
a strip conductor situated over the dielectric body,
the strip conductor comprising:
a half-wavelength resonator having a pair of portions which are arranged oppositely; and
a stub coupled with the half-wavelength resonator,

wherein the ground conductor, the dielectric body and the strip conductor form a micro strip-line structure, each of the pair of portions of the half-wavelength resonator has a protrusion, a dielectric rod is provided above the protrusion of each of the pair of portions of the half-wavelength resonator and the dielectric rod is vertically movable to tune a resonance frequency in the odd-mode and another resonance frequency in the even-mode independently and the protrusion of each of the pair of portions is used for adjusting a capacitance of the half-wavelength resonator.

6. The tunable dual-band resonator according to claim 5 ,
wherein the pair of portions of the half-wavelength resonator have a symmetric structure in a plan view.

7. The tunable dual-band resonator according to claim 6 ,
wherein the pair of portions of the half-wavelength resonator are parallel to each other.

8. The tunable dual-band resonator according to claim 5 ,
wherein the strip conductor is comprised of a superconducting material.

9. The tunable dual-band resonator according to claim 5 ,
wherein the protrusion of each of the pair of portions has a rectangular shape in a plan view.

10. The tunable dual-band resonator according to claim 5 ,
wherein the dielectric rod is circular in cross section.

11. The tunable dual-band resonator according to claim 5 ,
wherein the dielectric rod is structured so as to be pushed in by turning a screw.

12. The tunable dual-band resonator according to claim 5 ,
wherein each of the pair of portions of the half-wavelength resonator has a length for serving as a resonator in an odd-mode.

13. The tunable dual-band resonator according to claim 5 ,
wherein surfaces of the pair of portions of the half-wavelength resonator arranged oppositely function as an electrical/magnetic walls.

Assignees

• Univ Yamanashi
• Japan Steel Works Ltd

Inventors

• Sekiya Naoto
• Terao Katsuhiro
• Kishida Kazuhito
• Sato Yasuo
• Kitada Noritaka

Classifications

• H03H9/24

  Constructional features of resonators of material which is not piezoelectric, electrostrictive, or magnetostrictive · CPC title

• H01P7/082

  Microstripline resonators (H01P7/088 takes precedence) · CPC title

• H01P1/20309 Primary

  with dielectric resonator · CPC title

• H03H7/0161

  Bandpass filters (H03H7/12 takes precedence) · CPC title

• H01P7/105

  Multimode resonators · CPC title