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Fluorescent Paper Strips for the Detection of Diesel Adulteration with Smartphone Read-out

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L-Shaped Coplanar Strip Dipole Antenna Sensor for Adulteration Detection.

Sreedevi K Menon^1,2, Massimo Donelli³

¹Department of Electronics and Communication Engineering, Amrita Vishwa Vidyapeetham, Amritapuri 690525, India.

Sensors (Basel, Switzerland)

|January 25, 2025

Summary

This study introduces an L-shaped coplanar strip dipole antenna for detecting food adulterants like hydrogen peroxide in liquids. The antenna sensor shows reliable variations in reflection coefficients for effective adulterant detection.

Keywords:

adulteration sensor coplanar strip dipole antenna microwave sensor sensitivity

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Area of Science:

Electromagnetics
Sensor Technology
Food Science

Background:

Food adulteration poses significant health risks.
Rapid and reliable detection methods for food adulterants are crucial.
Electromagnetic sensors offer a non-destructive approach to food analysis.

Purpose of the Study:

To propose and validate an L-shaped coplanar strip dipole antenna for detecting adulterants in liquid food samples.
To optimize antenna design for enhanced sensing capabilities.
To demonstrate the antenna's effectiveness in identifying hydrogen peroxide in common food liquids.

Main Methods:

Antenna design and optimization using ANSYS HFSS software.
Fabrication and experimental validation of a prototype antenna sensor.
Analysis of reflection coefficients and resonance frequency shifts upon sample introduction.
Sensitivity and repeatability analysis for adulterant detection.

Main Results:

The L-shaped coplanar strip dipole antenna successfully detected varying concentrations of hydrogen peroxide in milk, pineapple juice, and mango juice.
Significant variations in the antenna's reflection coefficient and resonance frequency were observed with different adulterant concentrations.
The sensor demonstrated good sensitivity and repeatability in experimental trials.

Conclusions:

The proposed L-shaped coplanar strip dipole antenna is a viable and effective sensor for detecting adulterants in liquid food matrices.
This electromagnetic sensing approach offers a promising method for quality control in the food industry.
Further research can explore its application for detecting a wider range of food adulterants.