Filter assembly comprising a plastic resonator support and resonator tuning assembly
US5612655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1995 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | Jul 6, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2084
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A filter including a cavity, a resonator structure and having a plastic resonator support and plastic tuning assembly suitable for both manual and automatic tuning applications. The dielectric resonator structure comprises a substantially cylindrical ceramic resonator, and a plastic support having a plurality of spaced apart elements diverging from a shoulder of the plastic support, each of the elements terminating in a cantilevered stop, the cantilevered stops holding the ceramic resonator in a fixed relationship with respect to the plastic support and the cavity. A resonator tuning assembly is provided that comprises a substantially cylindrical ceramic tuning element and a plastic tuning shaft having a coupling means at a first end and being threaded along a portion of its length. A ceramic tuning element is affixed to the shaft at a second end. A substantially cylindrical tuning cap is threadably engaged with the plastic tuning shaft, such that rotational motion of the tuning shaft within the tuning cap results in linear motion of the tuning element with respect to the tuning cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.