# US 2021/0242562 A1 · A tunable waveguide resonator

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- Number: US 2021/0242562 A1
- Document ID: US20210242562A1
- Status: Published application
- Kind: A1
- Application number: 17/051,404
- Filed: 2018-05-04
- Published: 2021-08-05
- Earliest claimed: 2018-05-04
- Assignees: Telefonaktiebolaget LM Ericsson (publ)
- Applicants: Telefonaktiebolaget LM Ericsson (publ)
- Inventors: Anatoli DELENIV; Ove PERSSON
- Web page: https://patentgrep.com/patent/US20210242562A1

## CPC

- H01P 7/06: Cavity resonators
- H01P 1/207: Hollow waveguide filters (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence)
- H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B)

## Abstract

The present disclosure relates to a tunable waveguide resonator comprising a rectangular waveguide part having electrically conducting inner walls, a first waveguide port and a second waveguide port. The resonator comprises at least one tuning element positioned between the waveguide ports, where each tuning element comprises an electrically conducting body and a holding rod. The holding rod is attached to the electrically conducting body and is movable from the outside of the resonator such that the electrically conducting body can be moved between a plurality of positions within the waveguide part by means of the holding rod.

## Claims

### Claim 1

A tunable waveguide resonator comprising: a rectangular waveguide part having electrically conducting inner walls, a first waveguide port and a second waveguide port, where the resonator comprises at least one tuning element positioned between the waveguide ports, wherein each tuning element comprises an electrically conducting body and a holding rod, where the holding rod is attached to the electrically conducting body and is movable from the outside of the resonator such that the electrically conducting body can be moved between a plurality of positions within the waveguide part by the holding rod.

### Claim 2 (depends on 1)

The tunable waveguide resonator according to claim 1, wherein the waveguide ports are constituted by iris openings.

### Claim 3 (depends on 1)

The tunable waveguide resonator according to claim 1, wherein the holding rod is electrically conducting.

### Claim 4 (depends on 1)

The tunable waveguide resonator according to claim 1, wherein the holding rod is extending through the waveguide part via corresponding apertures, where these apertures cross a plane running through the waveguide part parallel to an extension axis of the holding rod when mounted, where only a mode with an electrical wall in the plane is excited within the apertures such that power leakage via the apertures is avoided.

### Claim 5 (depends on 1)

The tunable waveguide resonator according to claim 1, wherein the holding rod is connected to an electrically controllable motor.

### Claim 6 (depends on 1)

The tunable waveguide resonator according to claim 1, wherein the electrically conducting body is a cylindrical part.

### Claim 7 (depends on 1)

The tunable waveguide resonator according to claim 1, wherein the tuning element is integrally formed as one part.

### Claim 8 (depends on 1)

The tunable waveguide resonator according to claim 1, wherein the holding rod comprises two separate rod parts that are attached to opposite sides of the electrically conducting body.

### Claim 9 (depends on 1)

The tunable waveguide resonator according to claim 1, wherein the holding rod comprises one integral part that is running through the electrically conducting body.