Radio frequency antenna with controllably variable dual orthogonal polarization
US4737793A · kind A · utility
44Cited by
15References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1983 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Oct 28, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/0435
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A controllable dual input/output port power divider coupled with a controllable phase shifter feed a dual ported dual polarized microstrip antenna structure. By controlling the power divider and phase shifter, arbitrary orthogonal polarization (e.g., linear, circular or elliptical) radiated r.f. fields are obtained. Virtually the entire structure comprising the dual port power divider, phase shifter and microstrip radiator may be formed of shaped photo-chemically etched microstrip conductors disposed a very short distance (e.g., less than one-tenth wavelength) above a conductive reference surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.