Antenna feeding with selectively controlled polarization
US4504836A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1982 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Jun 1, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q13/065
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A flat face annular grooved metal surface surrounds a circular waveguide opening coupled to a small dipole radiator which excites the circular waveguide in its fundamental propagating mode (TE.sub.11). The dipole is arranged to rotate about its axis by means of an extension of its inner conductor, which forms a simple probe in a section of rectangular waveguide situated behind the circular waveguide. A dielectric shaft is fastened to the inner conductor and is brought to the outside of the rectangular waveguide where it is connected to a small motor. The motor is arranged so that it may be actuated remotely by any of several circuits. The dipole may be before the corrugated plate with bent arms. A pair of dipoles may be arranged perpendicular to each other with two separate coaxial connector antenna feed outputs for direct attachment to coaxial-type low-noise amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.