Bandpass microwave filter tunable by relative rotation of an insert section and of a dielectric element
US9620837B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 17, 2014 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Mar 4, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P7/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A bandpass filter for microwave-frequency wave which is frequency tunable, comprises at least one resonator. Each resonator comprises a cavity having a conducting wall substantially cylindrical in relation to an axis Z, and at least one dielectric element disposed inside the cavity. The resonator resonates on two perpendicular polarizations having respectively distributions of the electromagnetic field in the cavity that are deduced from one another by a rotation of 90° and according to one and the same frequency. The wall of the cavity comprises an insert section facing the element having a different shape from a section not situated facing the element. The insert section and the element are able to perform a rotation with respect to one another in relation to the axis Z so as to define at least a first and a second relative position differing by an angle substantially equal to 45° to within 20°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.