Wide band stepped frequency ground penetrating radar

Patent · Mon Jan 01 04:00:00 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

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10
16
18
26
28
34
44
53
54
60
62
66
68
70
antenna
band
combined
cosine
cosine wave
current
current voltage
data
demodulated
direct
direct current
distance
domain
embodying
envelope
fast
fast fourier
forms
fourier
fourier transform
frequency
frequency domain
frequency ground
frequency signal
frequency signals
frequency source
ground
ground penetrating
indicative
magnitude
method
mixer
modulated
modulated signal
modulates
modulator
original
penetrating
penetrating radar
phase
phase modulator
plot
portion
position
preponderant
processed
produce
produced
provided
radar
radio
radio frequency
receive
receive antenna
reflected
reflection
resultant
resultant signal
series
shaped
signal
signals
signature
sine wave
single
source
stepped
stepped frequency
target
therefrom
transform
transmission
transmit
transmit antenna
transmitted
unit
voltage
voltage signal
voltage signals
wave
wide
wide band