Patent ID: 6087980
Filing Date: 2000-07-11
Classification: G01S

Abstract:
A radar comprising:a transmitting/receiving antenna;a transmitting unit connected to the antenna via branching means, for transmitting a continuous transmission signal obtained by frequency modulating a carrier with a modulating signal varying with time;a receiving unit connected to said antenna via said branching means, for mixing a reflected wave signal received from a target via said antenna and a reference signal branched from the transmission signal, extracting a beat signal from the mixture of signals, and sampling and holding said beat signal,a high frequency switch for transmission; inserted and for turning on and off the path between said transmitting unit and said branching means; andcontrol means for providing a sample/hold control signal synchronized to a sample/hold cycle when the receiving unit samples and holds the beat signal, and blocking the transmission output of said transmitting unit for a predetermined period of time by controlling said high frequency switch ""off"" in synchronism to said sample/hold control signal.