Filter having switch function and band pass filter
US8072294B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 5, 2008 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Jun 5, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2136
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The filter has a switch function of selectively transmitting a transmission signal through one of first and second branch waveguides branching from a primary waveguide. The filter includes resonators disposed in the first and second branch waveguides. The resonator includes a space formed inside a metal cover, a central conductor disposed inside the space, and a short-circuiting plate. The central conductor has one end grounded to an outer conductor. The short-circuiting plate allows the neighborhood of an open end of the central conductor to be selectively conducted to the outer conductor. The filter performs a selection from the first and second branch waveguides by switching electrical conductivity in a region between the neighborhood of the open end of the central conductor and the outer conductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.