Corrugated ridge waveguide phase shifting structure
US4725795A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1985 |
| Grant date | Feb 16, 1988 |
| Priority date | — |
| Expiry date | Aug 19, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/182
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A differential phase shifting structure is disclosed, employing corrugated ridges in square or round waveguides or in coaxial lines operating in the TE.sub.11 mode. The structure provides a substantially constant differential phase shift between two waves polarized orthoganally to each other. The corrugations in the ridge provide a series inductance which can be optimized with the shunt capacitance of the ridge to provide a characteristic impedance matching that of the unloaded structure. The corrugated ridges provide increased differential phase shift per unit length. The differential phase shifting structure is particularly well suited to such applications as circular polarizers, quarter wave plates or polarization rotating half-wave plates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.