Coupling mechanisms for dielectric resonator loaded cavity filters
US6353373B1 · kind B1 · utility
Inventors
Key dates
| Filing date | May 3, 2000 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | May 3, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2084
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dielectric loaded cavity filter having a housing and a cover and defining at least two adjacent cavities having respective dielectric resonators mounted therein and separated by a transverse partition defining a coupling window in the housing. In one form, the coupling window has two spaced opposing sidewalls confronting each other, and vertically offset shoulders intermediate their length. A conductive coupling strip is secured to the shoulder of one sidewall and extends across the coupling window and over the shoulder of the other sidewall. A tuning screw is secured by threading to the housing and has an outer free end accessible from the exterior of the filter, and an internal end disposed adjacent the coupling strip, whereby when the tuning screw is rotated, the internal end of the screw moves toward and away from the coupling strip in a direction perpendicular to the cover for tuning without requiring access to the coupling strip. In another form, no coupling strip is present and the tuning screw inner end confronts a shoulder of a sidewall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.