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Title: Wide band stepped frequency ground penetrating radar

A wide band ground penetrating radar system (10) embodying a method wherein a series of radio frequency signals (60) is produced by a single radio frequency source (16) and provided to a transmit antenna (26) for transmission to a target (54) and reflection therefrom to a receive antenna (28). A phase modulator (18) modulates those portion of the radio frequency signals (62) to be transmitted and the reflected modulated signal (62) is combined in a mixer (34) with the original radio frequency signal (60) to produce a resultant signal (53) which is demodulated to produce a series of direct current voltage signals (66) the envelope of which forms a cosine wave shaped plot (68) which is processed by a Fast Fourier Transform unit 44 into frequency domain data (70) wherein the position of a preponderant frequency is indicative of distance to the target (54) and magnitude is indicative of the signature of the target (54).
Inventors:
 [1];  [2];  [2];  [3];  [4];  [5];  [6]
  1. (Buellton, CA)
  2. (Santa Maria, CA)
  3. (Ventura, CA)
  4. (Santa Barbara, CA)
  5. (Goleta, CA)
  6. (Alexandria, VA)
Issue Date:
OSTI Identifier:
870338
Assignee:
EG&G Energy Measurements, Inc. (Las Vegas, NV) INEEL
Patent Number(s):
US 5499029
Contract Number:
AC08-83NV10282
Research Org:
EG & G ENERGY MEASUREMENTS INC
Country of Publication:
United States
Language:
English
Subject:
wide; band; stepped; frequency; ground; penetrating; radar; 10; embodying; method; series; radio; signals; 60; produced; single; source; 16; provided; transmit; antenna; 26; transmission; target; 54; reflection; therefrom; receive; 28; phase; modulator; 18; modulates; portion; 62; transmitted; reflected; modulated; signal; combined; mixer; 34; original; produce; resultant; 53; demodulated; direct; current; voltage; 66; envelope; forms; cosine; wave; shaped; plot; 68; processed; fast; fourier; transform; unit; 44; domain; data; 70; position; preponderant; indicative; distance; magnitude; signature; wide band; frequency signals; penetrating radar; resultant signal; stepped frequency; frequency domain; modulated signal; voltage signal; direct current; radio frequency; fourier transform; receive antenna; sine wave; frequency source; voltage signals; transmit antenna; frequency signal; phase modulator; ground penetrating; fast fourier; frequency ground; current voltage; cosine wave; /342/