Microwave filter with dielectric resonator
US8847710B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2011 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | Dec 13, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P7/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A filter of longitudinal axis Z includes: at least one resonant cavity delimited by walls made of a material that has a non-zero expansion coefficient; a dielectric resonator mounted in the cavity transversally to the axis Z; a mechanical device for compensating at least one resonance frequency of the cavity as a function of the temperature. The compensation device comprises: at least one rotationally mobile finger for each mode and for each cavity, the mobile finger penetrating to a fixed depth into the cavity via a pivot link, and an external mechanical actuator mounted parallel to the axis Z and mechanically coupled to the mobile finger, the external mechanical actuator being made of a material that has a coefficient of thermal expansion at least five times lower than that of the walls of the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.