Antenna device including reflector and primary radiator
US9312606B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 17, 2012 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Sep 13, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q19/192
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna device includes a reflector which forms an offset antenna with a portion of a rotational paraboloid being cut out, and a primary radiator which radiates a beam having an elliptical cone shape to an aperture plane of the reflector. A reflector contour of the aperture plane of the reflector is formed in an elliptical shape along an isolux line of an elliptical beam radiated from the primary radiator. Accordingly, a loss due to spillover of the reflector is compensated for in a space in which the reflector contour of the present embodiment protrudes from a general reflector contour having a virtual elliptical shape formed to be perpendicular to an axis of a beam incident on an aperture plane of the reflector. In a space in which the general reflector contour protrudes from the reflector contour of the present embodiment, degradation of illuminance efficiency of the reflector is compensated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.