Abstract/Details

A lightweight artificial dielectric for mitigating unwanted reflections and scattering at the soil-air dielectric boundary encountered by ground-penetrating radar


2008 2008

Other formats: Order a copy

Abstract (summary)

The development of an artificial dielectric is documented. The components of the finished product are 10 mm hollow polypropylene balls and 6 mm conducting beads. A method to separate—re-deploy the materials efficiently to achieve consistency of results is described. The material is placed over rough soil to make it look like smooth soil at the surface when illuminated by one antenna pair of a Focused Array Radar (FAR).

Experiments were conducted at Northeastern University, Boston, MA using an HP 8510 and Agilent 8714ES network analyzers, and Geo-centers, Inc., Newton, MA using one antenna-pair of a Focused Array Radar (FAR) system.

The HP 8510 used a paraffin-filled can as an open-ended waveguide to match artificial dielectric to soil, the Agilent 8714ES used WR284 waveguide to find the permittiviy of air, and a 3-1/8 inch E.I.A. coaxial transmission line to find permittivities of numerous materials (air, artificial dielectric of 2 different mixtures, dry sand, dry soil, bag moisture soil). The single antenna pair (send/receive) of a FAR system was used to verify the efficacy of the artificial dielectric under actual-use conditions.

The method used to characterize the real relative permittivity values in the coaxial system is described in detail. This method provided 10% accuracy across 700 to 1300 MHz.

Keywords: land-mine detection, artificial dielectric, ground penetrating radar, focused-array radar (FAR), cross-correlation, correlation coefficient, polypropylene, beads, real relative permittivity.

Indexing (details)


Subject
Civil engineering;
Electrical engineering
Classification
0543: Civil engineering
0544: Electrical engineering
Identifier / keyword
Applied sciences
Title
A lightweight artificial dielectric for mitigating unwanted reflections and scattering at the soil-air dielectric boundary encountered by ground-penetrating radar
Author
Beihold, Frederick William
Number of pages
125
Publication year
2008
Degree date
2008
School code
0160
Source
MAI 47/04M, Masters Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780549962380
Advisor
Rappaport, Carey M.
Committee member
Fenn, Alan J.; Silevitch, Michael B.
University/institution
Northeastern University
Department
Electrical and Computer Engineering
University location
United States -- Massachusetts
Degree
M.S.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
1461034
ProQuest document ID
304538819
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304538819
Access the complete full text

You can get the full text of this document if it is part of your institution's ProQuest subscription.

Try one of the following:

  • Connect to ProQuest through your library network and search for the document from there.
  • Request the document from your library.
  • Go to the ProQuest login page and enter a ProQuest or My Research username / password.