Multiple-section bandpass filter for broadcast communications
US7142837B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 2004 |
| Grant date | Nov 28, 2006 |
| Priority date | — |
| Expiry date | May 27, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2053
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multiple-section bandpass filter for broadcast communications includes adjacent waveguide segments with a perpendicular connecting segment between them to form a U-shaped signal path. The waveguide cavities of the segments may be extruded and rectangular in cross section, and have a groundplane spacing that allows signal propagation between filter sections by evanescent coupling. Resonators in each of the adjacent segments have a separation that establishes the coupling bandwidths without the need for passive decoupling structures. A cross coupling conductor between the adjacent segments provides a capacitive or inductive coupling between them. A decoupling structure may be located in the connecting segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.