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Title: Impulse radar with swept range gate

Abstract

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.

Inventors:
 [1]
  1. (Livermore, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
871830
Patent Number(s):
5805110
Application Number:
08/849869
Assignee:
Regents of University of California (Oakland, CA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
impulse; radar; swept; range; gate; finder; hidden; locator; based; ultra-wide; band; resolution; device; generates; equivalent; time; amplitude; scan; typical; inches; 20; feet; analog; limited; jitter; 01; differential; sampling; receiver; employed; effectively; eliminate; ringing; aberrations; induced; near; proximity; transmit; antenna; 10; background; subtraction; simplifying; circuitry; improving; performance; techniques; reduce; clutter; receive; signal; decoupling; 24; cavities; 22; placing; space; conductive; radiative; damping; elements; terminating; plates; openings; antennas; arranged; side-by-side; parallel; spaced; apart; configuration; coplanar; opposed; significantly; reduces; main; bang; coupling; range gate; near proximity; swept range; significantly reduce; wide band; impulse radar; resolution swept; equivalent time; spaced apart; significantly reduces; transmit antenna; sampling receiver; time amplitude; analog range; parallel spaced; amplitude scan; radar range; range resolution; range finder; ultra-wide band; effectively eliminate; improving performance; band radar; background subtraction; aberrations induced; pulse radar; receive signal; eliminate ringing; device generates; differential sampling; typical range; reduces main; /342/

Citation Formats

McEwan, Thomas E. Impulse radar with swept range gate. United States: N. p., 1998. Web.
McEwan, Thomas E. Impulse radar with swept range gate. United States.
McEwan, Thomas E. Tue . "Impulse radar with swept range gate". United States. https://www.osti.gov/servlets/purl/871830.
@article{osti_871830,
title = {Impulse radar with swept range gate},
author = {McEwan, Thomas E.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {9}
}

Patent:

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