Radar device and object detection method

Details Radar device and object detection method Radar device and object detection method

1999-06-29

2000-12-26

Gregory, Bernarr E.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

Spectrum analysis

342 27, 342118, 342128, 342195, 342196, G01S 1304, G01S 1308

Patent

active

061666823

ABSTRACT:
A radar device capable of discriminating a person possessing metals from a person having no metals by transmitting a radio wave includes a voltage controlled oscillator for generating a radio wave, an antenna for transmitting the radio wave generated by the voltage controlled oscillator and for receiving a reflected wave from metals as an object irradiated by the radio wave transmitted by the antenna, a multiplier for detecting a beat component of the wave transmitted by the antenna and the reflected wave received by the antenna, and an FFT operator for analyzing a frequency spectrum of the beat component detected by the multiplier, a recording unit for previously storing a predetermined reference pattern, and a comparison unit for comparing the analyzed result by the FFT operator with the reference pattern stored in the recording unit.

REFERENCES:
patent: 3972042 (1976-07-01), Johnson
patent: 4166973 (1979-09-01), Lilly, Jr. et al.
patent: 4256275 (1981-03-01), Flick et al.
patent: 4443792 (1984-04-01), Pidgeon et al.
patent: 5334981 (1994-08-01), Smith et al.

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