Broadbeam radiation of circularly polarized energy
US4065772A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1976 |
| Grant date | Dec 27, 1977 |
| Priority date | — |
| Expiry date | Jul 6, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q13/0241
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A horn for radiating circularly polarized energy includes a rear launcher section commencing with a double-ridged cross section and ending at the horn flare with a square cross section with the plane of polarization so that the wave excited in the square cross section is along a diagonal of the square. The horn flare section opens up to a dimension of approximately 70% larger than the square throat dimension to narrow the elevation beam. A dielectric slab oriented in the horizontal plane is seated in the flare section for introducing a frequency-varying differential phase shift between orthogonal modes for effectively compensating for the inherent phase shift in the flare. Refracting lenses that are half-cylinders having a diameter of about 25% of the horizontal aperture dimension with their axes aligned vertically are located close to the vertical aperture edges for refracting the energy at the horn edges into the region between 30.degree. and 60.degree. from the horn axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.