In this research, a gas sensor using double splitring resonator (DSRR) incorporated with conducting polymer (CP) is proposed at microwave frequencies (Ku-band). The DSRR fabricated on printed circuit board (PCB) is excited by a highimpedance microstrip line, and the CP is coated inside of an inner circle of the DSRR. Electrical characteristics of the CP can be deviated by an interaction between CP and a target gas, and then this deviation of electrical characteristic is demonstrated by S21 frequency response of the DSRR. To examine the performance of the proposed sensor, 100 ppm ethanol (C2H5OH) gas is exposed at room temperature. According to the measured result, the S21 resonance frequency of the DSRR is shifted by 220 MHz and simultaneously, the resonance amplitude is changed by 0.79 dB level. It is clearly found that the DSRR with CP material can be a good candidate for a sensitive gas sensor operating at microwave frequencies.
|Number of pages||4|
|Journal||Proceedings of IEEE Sensors|
|Publication status||Published - 2014 Dec 12|
|Event||13th IEEE SENSORS Conference, SENSORS 2014 - Valencia, Spain|
Duration: 2014 Nov 2 → 2014 Nov 5
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering