Substrate integrated waveguide cavity-backed slot antenna for X-band imaging applications

Non-invasive inspection, material evaluation and characterization are of paramount importance for quality control and structural health monitoring in various applications. Microwave imaging modalities have proven significant potential in such applications. Herein, a substrate integrated waveguide cavity-backed slot antenna is designed to operate in the X-band frequency range. The proposed antenna is modeled and analyzed using an electromagnetic simulation software, and its near-field characteristics are verified experimentally. The utility of the proposed antenna for imaging applications is demonstrated by imaging low-loss and high-loss material samples.