title: Droplet sensing using small and compact high-Q planar resonator based on impedance matching technique.
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.
authors: Department of Physics Education, Daegu University, Gyeongsan 38453, South Korea.
authors: Hee-Jo
authors: HJ
authors: Lee
authors: School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, South Korea.
authors: Jong-Gwan
authors: JG
authors: Yook