Development of a millimeter wave compact equipment for NDT of materials

Yang Ju, Yo Hirosawa, Masumi Saka, Hiroyuki Abé

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


We developed a compact equipment working at 94 GHz to replace the commonly used network analyzer for nondestructive testing of materials. The compact equipment was designed to measure the variations in the amplitude and phase of the reflected signal from the material relative to a reference signal. A good accuracy of the amplitude and phase measurement of the equipment was obtained in the confirmative experiments. The distribution of a drop of water in a wood plate is clearly visible in the millimeter wave images obtained by the amplitude and phase measurement.

Original languageEnglish
Pages (from-to)391-397
Number of pages7
JournalInternational Journal of Infrared and Millimeter Waves
Issue number3
Publication statusPublished - 2003 Mar


  • Compact equipment
  • Material
  • Millimeter wave
  • Nondestructive testing

ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Electrical and Electronic Engineering


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