Variable wide angle conical scanning antenna
US4862185A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1988 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Apr 5, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/20
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed is a variable angle conical scanning antenna that employs an offset paraboloidal reflector which is rotated about an axis that extends through the focus of the paraboloid of revolution that defines the reflector. Electromagnetic energy is supplied to the reflector by an antenna feed that is mounted at the focus of the paraboloid of revolution and directed along the axis of rotation. In this arrangement the electromagnetic energy that is reflected from the offset paraboloidal reflector forms an angle between the axis of rotation and the beam of reflected electromagnetic energy that is equal to the angle between the axis of rotation and the focal axis of the paraboloid of revolution that defines the reflector. Thus, conical scanning at a cone angle that is equal to twice the angle between the axis of rotation and the reflected beam of electromagnetic energy is achieved as the offset paraboloidal reflector is rotated. Variable angle scanning (i.e., conical scanning over a range of cone angles) is achieved by tilting the offset paraboloidal reflector about the focus of the paraboloid of revolution that defines the reflector with the axis of antenna rotation and the focal axis…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.