Multiplexing system for plural channels of electromagnetic signals
US5266911A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1992 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Oct 14, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2131
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multiplexing system combines a plurality of electromagnetic signals to propagate along a common path, preferably a square waveguide which can be connected to an antenna feed horn of square cross section which can support both circularly and linearly polarized electromagnetic waves. The system is operative with a plurality of sets of signal channels including a first set of A-channel signals and a second set of B-channel signals. A circular polarizer connects with a first end of the waveguide. All of the A-channel signals are fed into an input port of the polarizer. The B-channel signals are coupled into the waveguide by a plurality of couplers located at positions arranged serially along the waveguide, individual one of the couplers operating at different ones of the B-channel frequencies for selectively coupling respective ones of said B-channel signals into the waveguide to propagate toward the second end of the waveguide. Each of the couplers has a rectangular waveguide and plural cylindrical cavity filters interconnecting a broad and a narrow wall of the rectangular waveguide with two contiguous walls of the square waveguide. Slotted apertures act to couple directionally the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.