Directionally sensitive receiving antenna employing gyrotropic material
US4907010A · kind A · utility
4Cited by
6References
8Claims
0Family size
Inventor
Key dates
| Filing date | Jan 15, 1987 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Jan 15, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q25/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Antenna apparatus has two laterally spaced waveguide horns with apertures covered by layers of gyrotropic ferrite material. The layers are angled to present opposite angles of incidence to radiation from a common distant source. Electromagnets produce magnetic fields in and parallel with the ferrite layers. The relative phase or amplitude of energy received on the horns is compared to indicate the direction of the source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.