Patent ID: 6169511
Filing Date: 2001-01-02
Classification: G01S

Abstract:
A radar detector comprising: an antenna for receiving a radar signal; a voltage controlled oscillator which receives a control signal and generates a signal of a frequency corresponding thereto; a first mixer in which said radar signal is mixed with the output signal of said voltage controlled oscillator; plurality of local oscillators which generate signals with frequencies that are different each other; a second mixer in which the output signal of said first mixer is mixed with one of the output signals of said plurality of local oscillators; a detector which detects said radar signals on the basis of the output of said second mixer; a sweep signal generating section which generates and supplies a sweep signal to said voltage controlled oscillator as said control signal; a memory section which stores pair combination data indicating the relation between the frequency of said voltage controlled oscillator, the frequencies of said local oscillators and the frequency of the received radar signal in advance; and a controlling section which obtains information regarding the frequency of said voltage controlled oscillator and the frequency of said one of the local oscillator from which the output is input to said second mixer when said detector detects a radar signal and decides the frequency of said radar signal by comparing the obtained information with said pair combination data in said memory section.