EBG-based Sensor for Dielectric Characterization in Liquids

Ali Arif, Amna Zubair, Hafiz Saad Khaliq, Muhammad Zubair, Kashif Riaz, Muhammad Qasim Mehmood

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

A novel, low-cost and compact microwave sensor based on Electromagnetic Bandgap Structure (EBG) has been proposed to detect and sense the change in the reflection coefficient of a compact Koch fractal patch antenna for different dielectric constant liquids at 2.45 GHz ISM Band. The proposed design of a sensor is composed of a 2 × 2 array of square unit cells as an EBG plane, and a Koch modified fractal antenna designed on a specialized polymer-based Rogers 5880 substrate. A trench is etched out from the substrate in between the 2 × 2 unit cells of EBG plane to act as a microfluidic channel for deposition of the liquids. A variation in the reflection phase of an EBG plane is observed when these etched out microfluidic channels are filled with liquids of different permittivities using a patch antenna placed on it at a height of 0.082 λ 0. To verify this concept, three liquids of different dielectric properties (butan-1-ol, ethanol, and methanol) are filled in the microfluidic channels of EBG plane. A significant change in the reflection coefficient of a patch antenna is observed with good quality factor and sensitivity. Our demonstrated EBG-based sensor remarkably decrease the cost and the size of a sensing platform without compromising sensitivity and provides a route to realize highly efficient and affordable sensor for dielectric characterization in liquids and detection of contaminants in daily edible items.
Original languageEnglish (US)
Title of host publicationProceedings of 2020 17th International Bhurban Conference on Applied Sciences and Technology, IBCAST 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages633-636
Number of pages4
ISBN (Print)9781728146768
DOIs
StatePublished - Jan 1 2020
Externally publishedYes

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