Method and device for protection against a jammer in a radio station comprising several change-over antennas and their use for the making of radiogoniometers
US4903032A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Jul 6, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/72
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The method consists in the step of masking the energy influence of the aliased spectrum of a jammer received in the useful band of each of the reception channels of a radio station during a determined time interval surrounding the change-over instant of each antenna. The masking is done either by means of attenuators with diodes placed at the input of each of the reception channels and controlled during the determined time interval or by memorizing, at least during the time interval, the gain of the intermediate frequency amplifiers before the change over takes place, by opening the automatic gain control loop of the intermediate frequency amplifiers to stabilize the gain of each amplifier, during the change over, at its memorized gain value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.