X-Band and Low-RCS Flexible Wideband Antenna Array Based on Metasurface

Transparent metasurface-loaded flexible antenna for the X band. The dumbbell-shaped metasurface is a type of polarization conversion unit arranged in a checkerboard pattern. This structure achieves 10 dB linear polarization radar cross-section (RCS) reduction under vertical incidence within the 9.2 GHz to 21.2 GHz range. Attach it to a slotted antenna array powered by a 1-to-4 Wilkinson power divider. The antenna has good radiation characteristics within the bandwidth of the X band. This antenna design boasts a low profile (0.14 lambda(0)), flexibility, and interference resistance. In the 0 degrees-90 degrees central angle bending scenario, the structure maintains good RCS reduction and antenna radiation properties, while also effectively reducing electromagnetic waves at 0 degrees-45 degrees angle, making it highly suitable for wider applications such as detection radar, satellite communications, and medical equipment.