2021 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) | 2021
Ultra-wide Band Microwave Chemical Sensing with Time-domain Measurement Systems
Abstract
Three time-domain ultra-wide band (UWB) microwave sensing systems for detecting chemicals are studied in this work. They are impulse-radio (IR) UWB, chirped-pulse Fourier transform microwave (CP-FTMW), and dual comb spectroscopy (DCS) techniques implemented by instrument including a high speed arbitrary waveform generator, a microwave network analyzer, and a real-time oscilloscope to detect ethanol, methanol and their mixtures inside a microstrip sensor. Ethanol-methanol mixtures are successfully detected with the accuracy of %5 in the mixing ratio by using IR-UWB system. The results suggest that the CP-FTMW technique is fast with large signal-to-noise ratio and the DCS needs the simplest receiver being cost-effective.