Comparison of two post-calibration correction methods for complex permittivity measurement of biological tissues up to 50 GHz

Mohammad Reza Tofighi, Afshin Daryoush

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Two correction methods arc discussed in this paper to remove residual errors due to the lack of repeatability of coaxial-to-microstrip launchers as part of the TRL calibration procedure. These methods are applied for accurate insertion loss measurement of biological tissues embedded in a two-port microstrip test fixture, from which the tissues' complex permittivity values are extracted for frequencies between 15 and 50 GHz. In the first method, distilled water is used as a calibration standard as part of a two-port calibration procedure. The second method identifies an error transfer function using the difference between simulated and measured insertion loss for distilled water, and then applies it as a correction factor to the measurement results for biological tissues. Both methods are compared in terms of extracting the accurate complex permittivity of brain matter.

Original languageEnglish (US)
Pages (from-to)1170-1175
Number of pages6
JournalIEEE Transactions on Instrumentation and Measurement
Volume51
Issue number6
DOIs
StatePublished - Dec 1 2002

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering

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