Side-coupled microwave filter with circumferentially-spaced irises
US6459346B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2000 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Sep 10, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/208
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A microwave filter has a set of irises to couple cavities within the filter. A trifurcated iris comprises a central iris and a pair of peripheral irises. The peripheral irises are configured and oriented to couple a primary mode having a magnetic field in the axial direction of a filter cavity. The central iris is configured and oriented to couple a secondary mode having a magnetic field in the azimuthal direction of the filter cavity. The configuration of the trifurcated iris is further oriented to minimize the influence of higher order signals such as the TE21X mode. The peripheral iris are oriented at null points of the primary TE21X mode and the central iris is also located at a null point. An input and an output iris are configured to receive electromagnetic energy in the axial direction of the filter. The input and output irises are oriented to minimize signals in the TE21X secondary mode and any TM modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.