Patent ID: 8922424

Claim:
A pulse radar device comprising: a radiation type oscillator including a three-electrode high-frequency amplifying device integrated a resonant cavity to generate negative resistance, the oscillator performing an oscillating operation and simultaneously functioning as a transmitting and receiving antenna of the pulse radar device; and a processor configured to analyze and process an IF signal produced by the radiation type oscillator, wherein the three-electrode high-frequency amplifying device is momentarily operated to establish a short-duration negative resistance, and a high-frequency pulse signal of an oscillating frequency/frequency band width determined based on the negative resistance and the structure of the resonant cavity is generated and simultaneously radiated into space, the high-frequency pulse signal radiated into space constitutes a transmitted RF signal while a reflected wave of the transmitted RF signal from an object of detection constitutes a received RF signal, and the radiation type oscillator is caused to perform oscillating operation when the received RF signal enters the radiation type oscillator, whereby the radiation type oscillator itself performs homodyne mixing to provide the IF signal that is analyzed and processed by the processor to detect the object of detection.