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Multipurpose chemical liquid sensing applications by microwave approach
Ayşegül Karatepe1, Oğuzhan Akgöl1, Yadgar I Abdulkarim2,3
1Department of Electrical and Electronics, Iskenderun Technical University, Hatay, Turkey.
Plos One
|May 12, 2020
Summary
A novel printed circuit board (PCB) microstrip rectangular patch antenna sensor effectively detects ethanol alcohol in wine and isopropyl alcohol in disinfectants by monitoring dielectric properties. The sensor shows linear frequency shifts with varying alcohol concentrations, proving its multipurpose chemical sensing viability.
Area of Science:
- Electromagnetic sensing
- Chemical sensor technology
- Material characterization
Background:
- Accurate detection of alcohol concentrations in consumer products like wine and disinfectants is crucial for quality control and safety.
- Existing sensing methods may lack specificity or require complex sample preparation.
- Dielectric properties of materials change predictably with varying concentrations of alcohol.
Purpose of the Study:
- To propose and validate a novel printed circuit board (PCB) microstrip rectangular patch antenna sensor for detecting ethanol alcohol and isopropyl alcohol.
- To investigate the correlation between the dielectric properties of alcohol solutions and the sensor's resonant frequency.
- To demonstrate the sensor's capability for multipurpose chemical sensing applications.
Main Methods:
- Sensor design using finite integration technique (FIT) based high-frequency electromagnetic solver (CST).
- Fabrication of the proposed sensor using a Proto Mat E33 machine.
- Measurement of dielectric properties of ethanol and isopropyl alcohol solutions using a dielectric probe kit.
- Numerical simulations incorporating measured dielectric data to predict sensor response.
Main Results:
- A linear shift in the sensor's resonant frequency was observed with changes in the dielectric constant of the alcohol solutions.
- The sensor demonstrated distinct responses to varying concentrations of both ethanol alcohol and isopropyl alcohol.
- Excellent agreement was found between simulated and measured sensor results, validating the approach.
Conclusions:
- The proposed PCB microstrip rectangular patch antenna sensor is a viable tool for detecting different concentrations of ethanol and isopropyl alcohol.
- Dielectric behavior serves as an effective sensing agent for chemical analysis using this antenna sensor.
- The sensor's design and performance highlight its potential for diverse, multipurpose chemical sensing applications.
