Patent ID: 9140783
Filing Date: 2015-09-22
Classification: G01S

Abstract:
1. A radar device, comprising: a transmission control unit that generates a reference signal corresponding to a predetermined radar method; a pulse signal generation unit that modulates the reference signal input from the transmission control unit into a pulse signal; a first antenna that radiates the pulse signal from the pulse signal generation unit into air; a second antenna that receives a direct wave from the first antenna and a reflected signal from a target; a frequency conversion unit that uses the reference signal from the transmission control unit so as to convert a frequency of a reception signal received by the second antenna; a wide band filter unit having a band pass frequency response with a wider band width than a frequency band of the pulse signal, the wide band filter unit performing filtering without rounding a pulse waveform of the pulse signal so that isolation between transmitting and receiving is at least a predetermined level, the wide band filter unit suppressing frequency components outside the frequency band of the pulse signal in a signal from the frequency conversion unit to generate an output signal; an A/D conversion unit that converts the output signal from the wide band filter unit into a digital signal; a storage unit that stores the digital signal from the A/D conversion unit; a frequency analyzing unit that performs frequency analysis on the digital signal stored in the storage unit; a target detection unit that detects, from the signal processed by the frequency analyzing unit, the reflected signal from the target as a target signal; and a target distance and relative speed calculation unit that calculates, from the target signal detected by the target detection unit, a distance and a relative speed of the target.