Thickness and permittivity measurement in multi-layered dielectric structures using complementary split-ring resonators

Chieh Sen Lee, Chin Lung Yang

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

This paper presents a non-invasive microwave method based on a square-shaped complementary split-ring resonator (CSRR) to measure the thickness and permittivity of multilayer dielectric structures. The CSRR sensor is etched on the ground plane of a microstrip line. The change of resonance frequency depends on the thickness and permittivity of the multilayer dielectric sample below the ground plane. For resolution analysis, the resonance frequency shifts caused by a variation of permittivity Δvarepsilon=0.01) and thickness Δ d=0.01~mm in the detection layer were compared across various design dimensions. Sensor size optimization improved the resolution in permittivity and thickness measurement by 66% and 37%, respectively. Subsequently, the permittivity and thickness resolution was improved by 28% and 16%, respectively, by optimizing the separation of the etched CSRRs. The analysis results show that a CSRR sensor can be designed with excellent resolution in core layer permittivity changes and thickness resolution in multilayered dielectric structures.

Original languageEnglish
Article number6636056
Pages (from-to)695-700
Number of pages6
JournalIEEE Sensors Journal
Volume14
Issue number3
DOIs
Publication statusPublished - 2014 Mar 1

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Electrical and Electronic Engineering

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