Scanning beam antenna with linear array feed
US4618867A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1984 |
| Grant date | Oct 21, 1986 |
| Priority date | — |
| Expiry date | Jun 14, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/2658
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a scanning beam antenna comprising a doubly-curved main reflector, a doubly-curved subreflector and at least one linear array feed. The main reflector is doubly-curved in two planes to produce a separate first focus for each feed in a first plane in front of the subreflector and a separate second focus for each feed in a second orthogonal plane behind the subreflector. The subreflector is curved to refocus each second focus of the main reflector to coincide with the image line of a first axis on the reflecting surface of the main reflector in the first plane. Each feed array is disposed at a separate secondary focus of the combination of the main reflector and subreflector. The resulting antenna provides very little phase error due to aberrations as each beam is linearly scanned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.