Complementary split-ring resonators for measuring dielectric constants and loss tangents

Chieh Sen Lee, Chin-Lung Yang

Research output: Contribution to journalArticlepeer-review

124 Citations (Scopus)


A noninvasive planar complementary split-ring resonator (CSRR) for measuring the dielectric constants and loss tangents of material is presented in this letter. Measurements were developed to extract the complex permittivity of the material under test (MUT) using the equivalent RLC resonator circuit model. This technique enables a single-step measurement of the MUT without the need for machining or reshaping. The method requires calculating only two parameters, the resonant frequency (fr) and the magnitude (dB) response, thus achieving a substantial reduction in cost and computation time. A CSRR sensor operating in the 1.8 to 2.8 GHz band is fabricated and tested for verification. The measurement errors in the dielectric constant were less than 7.6%. An efficient technique of CSRR measuring complex permittivity is experimentally verified.

Original languageEnglish
Article number6827981
Pages (from-to)563-565
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Issue number8
Publication statusPublished - 2014

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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