Antenna device and radar apparatus including the same
US7453411B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 2006 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Oct 19, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q19/134
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna device having a primary radiator that includes a transmitting section formed of a cylindrical waveguide extending parallel to a direction in which the front of the antenna device faces (front direction), and a rectangular horn-shaped radiant section extending perpendicular to the front direction. A waveguide whose central axis in the extending direction corresponds to that of the transmitting section of the primary radiator is connected to an end of the transmitting section via a rotary joint so as to be rotatable. A first reflector is of an offset parabolic type, and is disposed above the primary radiator in a predetermined position with respect to the primary radiator such that a predetermined directivity is obtained. A second reflector is parabolic in the vertical direction, and is toric in the horizontal direction. The second reflector is disposed below the primary radiator in a predetermined position with respect to the primary radiator such that a predetermined directivity is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.