Bandpass microwave filter tunable by a 90 degree rotation of a dielectric element between first and second positions
US9620836B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 17, 2014 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Jan 30, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P7/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A frequency tunable microwave bandpass filter comprises a resonator, including: a cavity with conducting wall substantially cylindrical with axis Z having height H, and partially closed at both ends; and a dielectric element inside the cavity. The resonator resonates at two perpendicular polarizations having distributions of electromagnetic field in the cavity deduced from eachother by 90° rotation. The element rotates about an axis substantially perpendicular to axis Z, between a first and second position. The element comprises a first end wherein: in a first position the element is disposed substantially in a plane perpendicular to axis Z and the center of the first end is disposed at a height in the cavity corresponding substantially to an electric field minimum; and in a second position the element is substantially parallel to Z and the first end is disposed in a plane corresponding to an electric field maximum within +/−30%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.