Switchable Complementary Diamond-Ring-Shaped Metasurface for Radome Application

Microwave radomes exhibiting bandpass behavior are highly desirable for antenna systems. However, most of these radomes are not frequency switchable owing to their fixed structures. Here, a switchable metasurface based on complementary diamond-ring-shaped resonators is proposed for radomes. The microwave properties of the metasurface are investigated via simulations and experiments at X-band. By adjusting the rotation angle θ from 0° to 90°, the bandpass frequency is switched from 11.0 to 9.4 GHz. Two passbands appear for 0° <; θ <; 90°. In addition, the bandwidth can also be tuned by adjusting the rotation angle. This approach paves the way for designing switchable microwave radomes.