Three-access polarization and frequency duplexing device
US4837531A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1987 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Jan 28, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/2131
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A three-access polarization and frequency duplexing device has in series a common circular waveguide for passing two polarizations of a wave within a low-frequency band and one polarizations of a wave within a high-frequency band, a first access waveguide which opens into the common waveguide and a transition, a secondary rectangular waveguide. The narrow sides of the secondary waveguide are parallel to one polarization of the low-frequency band and the broad sides are parallel to the polarization of the high-frequency band. A second access waveguide is connected to the secondary waveguide at right angles and coupled by a resonant slot. A short-circuit plate performs a short-circuiting function for the high-frequency portion of the wave of the high-frequency band aligned with the second access waveguide. The free end of the secondary waveguide being forms a third access waveguide. The first access waveguide has a filter for selecting a polarization of the wave from the low-frequency band. The second access waveguide is at right angles to the broad side of the secondary guide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.