Methods and systems for reducing interference caused by antenna leakage signals
US7576683B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2006 |
| Grant date | Aug 18, 2009 |
| Priority date | — |
| Expiry date | Aug 7, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/882
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In one aspect, a method of radar altimeter operation including a time dependent gain control is described. The method comprises triggering a Sensitivity Time Control (STC) gain control signal at a pulse repetition frequency (PRF) of a transmit pulse to attenuate interference from at least one of an antenna leakage signal and a signal reflected from equipment. The method also includes shaping the STC gain control signal from no attenuation at a first time, before a transmitter sends the transmit pulse, to a stable maximum attenuation at the time the transmitter sends the transmit pulse, to no attenuation at a second time, after the transmitter sends the transmit pulse. The method also includes matching a bandwidth of an intermediate frequency (IF) amplifier to the pulse width of a transmitted pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.