Tunable filter for expanding the tuning range
US8704617B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2009 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Oct 20, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2053
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A tunable filter for expanding tuning range includes: a housing, which has multiple cavities defined by partitions; a resonator contained in the cavity; at least one sliding member installed over the resonator; a main cover coupled to an upper portion of the housing; and at least one tuning element coupled to a lower portion of the sliding member and made of a metallic material. Tuning is accomplished by a sliding motion of the sliding member, and the resonator includes a cylindrical first conductor and a second conductor coupled to an upper portion of the cylindrical conductor, where a cross section of the second conductor is shaped as a circle with a portion removed such that an area of overlap between the tuning element and the second conductor is varied according to a sliding of the tuning element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.