Polarization-sensitive receiver for microwave signals
US4831384A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 31, 1988 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | May 31, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q15/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention relates to a receiver for microwave signals--either emitted by a body or reflected therefrom--capable of analyzing the polar distribution of the signal strength by measuring the strength of the incoming signal after it had been passed through a horizontal, polarizing filter disk with three distinct transmission regions. One region transmits the entire signal reflected from a planar mirror positioned substantially at 45 degrees to the horizon and rotated on a vertical axis; the second and third regions in the planar electro-optical filter are defined by parallel grid lines, formed by electrical conductors opaque to the reflected radiation and aligned in mutually orthogonal arrays in the two regions respectively, so that each grid alignment becomes transparent to one polarization of the radiation incident thereon. The filter is rotationally slaved to the reflecting mirror and the grid lines of one region are parallel to the horizon, as reflected onto the horizontal plane of the filter assembly, and admit the horizontally polarized component of the incoming signal; the grid lines of the other region admit the vertically polarized component. Comparison of the unmodified i…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.