Antenna for humidity sensor using split ring resonator

Siti Aminah Md Akhir (Universiti Malaysia Perlis)
Siti Zuraidah Ibrahim (Universiti Malaysia Perlis)
Nurshamimi Rosli (Universiti Malaysia Perlis)
Aini Syuhada Md Zain (Universiti Malaysia Perlis)
Nurehansafwanah Khalid (Universiti Malaysia Perlis)

Indonesian Journal of Electrical Engineering and Computer Science
Vol 13, No 2: February 2019

This paper presents an antenna as a humidity sensor application to control and monitor the quality of humidity. A passive sensor tag with low cost solution is suggested where it implemented on a low-cost substrate, FR4.  A capacitive sensor that works from 0 to 1.5 GHz is implemented in the design. The capacitive sensor is designed based on a small antenna loaded with a Split ring resonator (SRR). To sense the humidity, the SRR resonator is coated with Kapton, placed on the top of the resonator. To validate the proposed method, a prototype was fabricated. The comparison between simulated and measured reflection coefficient is presented.