Impulse radar with swept range gate

Patent · Tue Sep 08 04:00:00 EDT 1998

OSTI ID:871830

McEwan, Thomas E ^[1]

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1. Livermore, CA

A radar range finder and hidden object locator is based on ultra-wide band radar with a high resolution swept range gate. The device generates an equivalent time amplitude scan with a typical range of 4 inches to 20 feet, and an analog range resolution as limited by a jitter of on the order of 0.01 inches. A differential sampling receiver is employed to effectively eliminate ringing and other aberrations induced in the receiver by the near proximity of the transmit antenna (10), so a background subtraction is not needed, simplifying the circuitry while improving performance. Techniques are used to reduce clutter in the receive signal, such as decoupling the receive (24) and transmit cavities (22) by placing a space between them, using conductive or radiative damping elements on the cavities, and using terminating plates on the sides of the openings. The antennas can be arranged in a side-by-side parallel spaced apart configuration or in a coplanar opposed configuration which significantly reduces main bang coupling.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 5805110
• Application Number: 08/849869
• OSTI ID: 871830
• Country of Publication: United States
• Language: English

Related Subjects

/342/
01
10
20
22
24
aberrations
aberrations induced
amplitude
amplitude scan
analog
analog range
antenna
antennas
apart
arranged
background
background subtraction
band
band radar
bang
based
cavities
circuitry
clutter
conductive
configuration
coplanar
coupling
damping
decoupling
device
device generates
differential
differential sampling
effectively
effectively eliminate
elements
eliminate
eliminate ringing
employed
equivalent
equivalent time
feet
finder
gate
generates
hidden
improving
improving performance
impulse
impulse radar
inches
induced
jitter
limited
locator
main
near
near proximity
openings
opposed
parallel
parallel spaced
performance
placing
plates
proximity
pulse radar
radar
radar range
radiative
range
range finder
range gate
range resolution
receive
receive signal
receiver
reduce
reduces
reduces main
resolution
resolution swept
ringing
sampling
sampling receiver
scan
side-by-side
signal
significantly
significantly reduce
significantly reduces
simplifying
space
spaced
spaced apart
subtraction
swept
swept range
techniques
terminating
time
time amplitude
transmit
transmit antenna
typical
typical range
ultra-wide
ultra-wide band
wide band