Waveguide manifold coupled multiplexer with triple mode filters
US4614920A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1985 |
| Grant date | Sep 30, 1986 |
| Priority date | — |
| Expiry date | Jan 11, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2082
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multiplexer has a plurality of bandpass filters coupled through E-plane or H-plane T-junctions to a waveguide manifold. Where the multiplexer has four channels and each filter is a six-pole filter, two triple mode cavities make up each filter. Where each filter is a five-pole filter, one triple cavity and one dual mode cavity makes up each filter. Two band edge channel filters are operated to produce an asymmetrical filter function response, thereby causing extra transmission zeros to be created and improving the selectivity of the filter out of the passband. The multiplexer is designed for use in satellite communication systems and can have a reduced volume and weight when compared to previous multiplexers without any sacrifice in electrical performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.