Food Security Sensing System Using a Waveguide Antenna Microwave Imaging through an Example of an Egg

Area of Science:

• Electromagnetics
• Microwave Engineering
• Food Science

Background:

• Food security relies on rapid and non-destructive assessment methods.
• Existing sensing technologies may lack the necessary speed or non-invasive capabilities.
• Microwave imaging offers potential for internal material characterization.

Purpose of the Study:

• To develop and evaluate a waveguide antenna microwave imaging system for food security applications.
• To assess the system's capability in sensing materials with varying dielectric properties and shapes.
• To demonstrate the system's effectiveness in identifying the health status of eggs.

Main Methods:

• A waveguide antenna system operating at 7-13 GHz with a gain of 17.37 dBi was designed.
• The system's scanning area was measured to be 30 × 30 cm².
• High-k materials (circular and triangular) with different dielectric constants were used as test samples to evaluate resolution and sensitivity.

Main Results:

• The waveguide antenna microwave imaging system successfully sensed high-k materials with varying dielectric constants and shapes.
• The system demonstrated high sensitivity and resolution in distinguishing material properties.
• The system effectively identified the health status of eggs rapidly and non-destructively.

Conclusions:

• The proposed waveguide antenna microwave imaging system is a simple, non-destructive, and effective method for food security sensing.
• The system shows significant potential for rapid, real-time food quality and safety assessment.
• This technology can be applied to quickly evaluate the health status of numerous eggs.