Antenna arrangement and aircraft collision avoidance system
US5552788A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1995 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Jun 30, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/767
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An antenna arrangement on a host aircraft for generating power signals related to a direction from which a transponder reply signal is received from a threat aircraft. The arrangement includes first and second monopole antenna elements arranged along a first axis of the host aircraft, third and fourth monopole antenna elements arranged along a second axis of the host aircraft, with the second axis being orthogonal to the first axis, a first quadrature combiner coupled to the first and second monopole antenna elements for generating first and second signals from the received reply signal, and a second quadrature combiner coupled to the third and fourth monopole antenna elements for generating third and fourth signals from the received reply signal. The respective power levels of the first, second, third and fourth signals are related to the direction from which the reply signal is received from the threat aircraft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.