Near-field millimeter - wave imaging of nonmetallic materials

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Description

A near-field millimeter-wave (mm-wave) imaging system has been designed and built in the 94-GHz range for on-line inspection of nonmetallic (dielectric) materials. The imaging system consists of a transceiver block coupled to an antenna that scans the material to be imaged; a reflector plate is placed behind the material. A quadrature IF mixer in the transceiver block enables measurement of in-phase and quadrature-phase components of reflected signals with respect to the transmitted signal. All transceiver components, with the exception of the Gunn-diode oscillator and antenna, were fabricated in uniform blocks and integrated and packaged into a compact unit (12.7 x ... continued below

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7 p.

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Gopalsami, N.; Bakhtiari, S. & Raptis, A.C. December 31, 1996.

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Description

A near-field millimeter-wave (mm-wave) imaging system has been designed and built in the 94-GHz range for on-line inspection of nonmetallic (dielectric) materials. The imaging system consists of a transceiver block coupled to an antenna that scans the material to be imaged; a reflector plate is placed behind the material. A quadrature IF mixer in the transceiver block enables measurement of in-phase and quadrature-phase components of reflected signals with respect to the transmitted signal. All transceiver components, with the exception of the Gunn-diode oscillator and antenna, were fabricated in uniform blocks and integrated and packaged into a compact unit (12.7 x 10.2 x 2.5 cm). The objective of this work is to test the applicability of a near-field compact mm-wave sensor for on-line inspection of sheetlike materials such as paper, fabrics, and plastics. This paper presents initial near-field mm-wave images of paper and fabric samples containing known artifacts.

Physical Description

7 p.

Notes

INIS; OSTI as DE97004670

Medium: P; Size: 7 p.

Source

  • 14. world conference on nondestructive testing, New Delhi (India), 8-13 Dec 1996

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  • Other: DE97004670
  • Report No.: ANL/ET/CP--89248
  • Report No.: CONF-961263--1
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 477768
  • Archival Resource Key: ark:/67531/metadc675651

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 31, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • April 13, 2017, 12:48 p.m.

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Gopalsami, N.; Bakhtiari, S. & Raptis, A.C. Near-field millimeter - wave imaging of nonmetallic materials, article, December 31, 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc675651/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.