RADAR SYSTEM OPERATING BY MEANS OF FREQUENCY MODULATED PULSED WAVES

Assignee

U. S. PHILIPS CORPORATION, A CORP. OF DE

Filed

Dec 21, 1981

Granted

Dec 10, 1985

Location

VELIZY FR

Abstract

A radar system operating by means of frequency-modulated pulsed waves comprises an aerial system for directing such waves to at least one target located at a distance D and for receiving the waves reflected from said target, a mixer circuit having a first input for receiving a local signal, a second input for receiving the reflected signal received by the aerial system, and an output for producing information about the distance D, a frequency-modulated (FM) wave generator, a change-over device cooperating with a control circuit for temporarily connecting the FM wave aerial system to the generator, while the first input of the mixer circuit receives a signal derived from the output signal of the FM wave generator by means of a coupler. The control circuit comprises means for connecting the aerial system to the output of the FM wave generator during one of equal fixed time durations selected in a pseudo-random manner within a time interval of a fixed duration.

Source: Google Patents