Wide band stepped frequency ground penetrating radar

Patent · Mon Jan 01 00:00:00 EST 1996

OSTI ID:870338

Bashforth, Michael B ^[1]; Gardner, Duane ^[2]; Patrick, Douglas ^[2]; Lewallen, Tricia A ^[3]; Nammath, Sharyn R ^[4]; Painter, Kelly D ^[5]; Vadnais, Kenneth G ^[6]

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1. Buellton, CA
2. Santa Maria, CA
3. Ventura, CA
4. Santa Barbara, CA
5. Goleta, CA
6. Alexandria, VA

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).

• Research Organization: EG & G ENERGY MEASUREMENTS INC
• DOE Contract Number: AC08-83NV10282
• Assignee: EG&G Energy Measurements, Inc. (Las Vegas, NV)
• Patent Number(s): US 5499029
• OSTI ID: 870338
• Country of Publication: United States
• Language: English

Related Subjects

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
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