Microwave antenna based on low refractive index medium

Based on a low refractive index material medium using metal mesh and foam material, a microwave antenna with monopole radiation was made. Antenna directionality of the traditional antenna and the antenna using low refractive index medium was studied contrastively by the HFSS (electromagnetic simulation software). The comparison results indicated that antenna directionality of the antenna using low refractive index medium was better than that of the traditional antenna. An experiment was conducted to measure antenna directionality of the antenna using low refractive index medium. Good agreement was obtained between the experimental results and the theoretical predictions.