Submersible Printed Split-Ring Resonator-Based Sensor for Thin-Film Detection and Permittivity Characterization Articles uri icon

authors

  • GALINDO ROMERA, GABRIEL
  • HERRAIZ MARTINEZ, FRANCISCO JAVIER
  • GIL BARBA, MARTA
  • MARTINEZ MARTINEZ, JOSE JUAN
  • SEGOVIA VARGAS, DANIEL

publication date

  • May 2016

start page

  • 3587

end page

  • 3596

issue

  • 10

volume

  • 16

International Standard Serial Number (ISSN)

  • 1530-437X

Electronic International Standard Serial Number (EISSN)

  • 1558-1748

abstract

  • A split-ring resonator (SRR)-based sensor for the detection of solid thickness and relative permittivity characterization of solid and liquid materials is proposed. The structure is composed of two SRRs hosted in a microstrip transmission line. The sensing principle is based on the detection of the notch introduced by the resonators in the transmission coefficient. Hence, a frequency shift of the notch is related to a change in the effective permittivity of the structure when the sensor is covered with any solid or liquid material. A complete characterization of the sensor, for the three proposed applications, is performed through simulations. Finally, all simulated results are corroborated with measurements. The proposed sensor is implemented in single-layer printed technology, resulting in a low-cost and low-complexity solution. It presents real-time response and high sensitivity. Moreover, it is fully submersible and reusable.

keywords

  • effective permittivity; resonator; sensor; split-ring resonator (srr); submersible sensor; dielectric characterization; microfluidic sensor; metamaterials; sensitivity; lines