A Compact Wideband Vivaldi Antenna for Non-Invasive Glucose Monitoring.

Area of Science:

• Electromagnetics
• Biomedical Engineering
• Sensor Technology

Background:

• Vivaldi antennas offer high gain, wide bandwidth, and directional radiation.
• Non-destructive blood glucose detection is crucial for diabetes management.
• Current detection methods can be invasive or lack precision.

Purpose of the Study:

• To investigate the feasibility of using Vivaldi antennas for non-invasive blood glucose monitoring.
• To analyze the relationship between antenna S11 parameters and glucose concentration.
• To assess the sensitivity and accuracy of this novel detection method.

Main Methods:

• Utilized Finite Element Method (FEM) for antenna simulation.
• Conducted experiments to measure antenna S11 response (amplitude and phase) against varying glucose concentrations (0-6.11 mg/mL).
• Employed linear regression for glucose concentration prediction.

Main Results:

• Demonstrated a high linear correlation between Vivaldi antenna S11 response and glucose concentration.
• Quantified sensitivity of S11 amplitude (~0.3445 dB/(mg/mL) at 14.2556 GHz) and phase (~0.5652 degree/(mg/mL) at 14.37 GHz).
• Validated predictive accuracy using linear regression models.

Conclusions:

• Vivaldi antennas show significant potential for non-destructive blood glucose sensing.
• The S11 response provides a reliable indicator for glucose concentration monitoring.
• This approach offers a promising alternative to conventional blood glucose testing methods.