A Simple Data Transformation Technique for Inverse Scattering Applications in Waveguides

Yapar A., KILIC E., CAYOREN M., AKLEMAN F.

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, cilt.60, sa.11, ss.3650-3657, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 60 Sayı: 11
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1109/tim.2011.2135090
  • Dergi Adı: IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.3650-3657
  • Anahtar Kelimeler: Calibration, dielectric-loaded waveguide, imaging of dielectric permittivity, S-parameters, COMPLEX PERMITTIVITY, RECONSTRUCTION, PERMEABILITY, SAMPLES
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

A new method, which can be considered as a calibration technique to transform the measured raw S-parameters of a rectangular waveguide partially filled with a dielectric material into the desired reference planes, is presented. The method is based on the removal of errors arising from the multiple reflections and imperfections of the system elements such as adapters and connectors, through the T-parameter matrix representation of the system. The measured raw data are transformed into the terminal planes of the waveguide by simply calculating frequency-dependent complex coefficients. After this transformation, a quite satisfactory match is observed between the experimentally measured and numerically calculated S-parameters for different types of materials and configurations. The calibrated measured data are also used in the inverse problem to determine the dielectric permittivity of the materials, and the preliminary reconstruction results are very promising.