Patent ID: 7812760

Claim:
A short-range radar characterized by comprising: a transmitting unit which emits a predetermined short pulse wave into a space from a transmission antenna; a receiving unit which executes a process of receiving a wave reflected from an object existing in the space; and a signal processing unit which executes a process of analyzing the object based on an output signal from the receiving unit, wherein the transmitting unit includes: a first pulse generating unit which outputs a first pulse having a width longer than a width of the short pulse wave in a predetermined period; a second pulse generating unit which outputs a second pulse having a width corresponding to the width of the short pulse wave at a timing upon lapse of a predetermined time during an output period from the time point when the first pulse generating unit starts to output the first pulse; an oscillator which oscillates only during the period when the first pulse generating unit outputs the first pulse and outputs a signal in a frequency band of the short pulse wave; and a switch which receives an output signal from the oscillator, and is turned on to pass the output signal from the oscillator only during the period when the second pulse is output by the second pulse generating unit, an output signal from the switch being emitted into the space as the predetermined short pulse wave.