Droplet sensing using small and compact high-Q planar resonator based on impedance matching technique

Hee-Jo Lee; Jong-Gwan Yook

doi:10.1063/1.4963701

Droplet sensing using small and compact high-Q planar resonator based on impedance matching technique

Rev Sci Instrum. 2016 Sep;87(9):094706. doi: 10.1063/1.4963701.

Authors

Hee-Jo Lee¹, Jong-Gwan Yook²

Affiliations

¹ Department of Physics Education, Daegu University, Gyeongsan 38453, South Korea.
² School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, South Korea.

PMID: 27782576
DOI: 10.1063/1.4963701

Abstract

In this paper, we demonstrate the sensing feasibility of the proposed high-Q resonator using a phosphate-buffered saline droplet at microwave frequencies. In the experimental results, the resonant frequency, signal level, and Q-factor of the S₂₁-parameter with and without a 1-μl droplet were changed to about 230 MHz, 32 dB, and 1500, respectively. The resonator system was found to be suitable for droplet sensing with a small volume due to its small and compact scheme. This resonator system is expected to play an important role in droplet sensing with different dielectric constants.