Antenna beam shaping structure employing dipoles arrayed on a parabolic surface
US4352108A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1979 |
| Grant date | Sep 28, 1982 |
| Priority date | — |
| Expiry date | Jul 11, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q15/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An omni-directional type passive antenna in which the response pattern is a close approach to the ideal of a hemisphere. The system includes an antenna having an antenna axis extending in the direction of highest antenna sensitivity, and a first surface which is a surface of revolution swept out by a part of a parabolic curve rotated about the antenna axis, the axis of the parabolic curve being inclined at an angle in the range of about 70 to 80 degrees to the antenna axis with the focus of the parabolic curve substantially on the antenna axis. A first set of electrically isolated dipoles is mounted on the surface and all are similarly oriented such that they lie only along edges of axial planes of the antenna. The system also includes a second surface which is a surface of revolution swept out by a part of a parabolic curve rotated about an antenna axis, the axis of the parabolic curve being inclined at a similar angle at the first surface, with the focus of the latter parabolic curve at the same positon as the focus of the first surface. The second surface is spaced radially of the first surface with respect to the antenna axis. A second set of electrically isolated dipoles is mo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.