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Error Assessment and Mitigation Methods in Transient Radar Method.

Ali Pourkazemi1, Salar Tayebi1, Johan H Stiens1

  • 1Department of Electronics and Informatics, Vrije Universiteit Brussel, Pleinlaan 2, BE-1050 Brussels, Belgium.

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|January 18, 2020
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Summary
This summary is machine-generated.

A new Transient Radar Method (TRM) can now measure thin dielectric layers accurately. This contact-free technique corrects errors, enabling sub-wavelength thickness measurements for advanced material characterization.

Keywords:
blind method/algorithmelectromagnetic wavegeometric and electromagnetic characteristicslossy-lossy interfacemultilayer structuresnon-destructive testingnon-metallicsub-wavelength thickness measurements

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Area of Science:

  • Electromagnetics
  • Materials Science
  • Non-destructive Testing

Background:

  • Contact-free characterization of multilayer dielectric structures is crucial for material analysis.
  • The Transient Radar Method (TRM) offers a novel approach for geometric and thickness measurements.
  • Understanding and correcting TRM's inherent errors is essential for its practical application.

Purpose of the Study:

  • To identify and quantify the intrinsic and systematic errors associated with the Transient Radar Method.
  • To develop and extensively elaborate on solutions for mitigating these identified TRM errors.
  • To experimentally validate the error correction method for precise dielectric structure thickness measurements.

Main Methods:

  • Detailed analysis and quantification of TRM's error sources.
  • Development of novel error correction algorithms for TRM.
  • Experimental application of the corrected TRM to measure single-layer dielectric structures of varying thicknesses.

Main Results:

  • Intrinsic and systematic errors of TRM were thoroughly discussed and quantified.
  • Effective solutions for mitigating TRM errors were proposed and elaborated.
  • The error correction method enabled accurate sub-wavelength dielectric thickness measurements, achieving precision around λ / 5.

Conclusions:

  • The proposed error correction strategy significantly enhances the accuracy of the Transient Radar Method.
  • TRM, when corrected, is a powerful tool for non-destructive, contact-free characterization of dielectric materials.
  • This advancement allows for precise measurement of dielectric structures below the radar wavelength.