Abstract

A compact, low-cost, portable, non-invasive blood glucose sensor has been designed and presented in this paper. The proposed sensor is a triple-pole square Complementary Split Ring Resonator (CSRR) sensor that is etched on an FR4 substrate. At the bottom of the sensor is coupled an etched Microstrip Transmission Line (MTL) with an impedance matching of 50 Ω, which excites the sensor elements. Utilizing the CSRR-based sensor overcomes the disadvantages of pain and discomfort that the traditional method of pricking the skin to measure blood glucose levels could pose. The sensors work in such a way that as the glucose concentration changes, the transmission resonances of the sensor harmonics will change as well. As the human blood is mimicked, the sensor can easily detect and/or measure slight changes in the blood sugar level. The work was designed and simulated on Ansys HFSS, a 3D electromagnetic (EM) simulation software. The glucose concentration, which mimics the blood sugar level concentration, is modeled using the cole-cole model. A 3-D model of the thumb was proposed and used in the simulation. Experimentally, the resonance frequency of the sensor when unloaded was found to be approximately 2.8 GHz. However, the sensor can be used to monitor variations in the transmission at frequencies less than 2.8 GHz, making it safe for use. The size of the proposed sensor is 55.6×20×1.5 mm3, making it easily carried.

Publication Date

12-2023

Document Type

Master's Project

Student Type

Graduate

Degree Name

Electrical Engineering (MS)

Department, Program, or Center

Electrical Engineering

Advisor

Boutheina Tlili

Campus

RIT Dubai

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