X-Band and Low-RCS Flexible Wideband Antenna Array Based on Metasurface
Hongzhi Chen, Qiutong Zhen, J. Chen, Haoyuan Sun, Haoran Li, Л. Ф. Черногор, Zhongsen Sun, Yu Zheng, Tian Liu, Zhejun Jin
Abstract
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<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">${{\lambda }_0}$</tex-math></inline-formula>), flexibility, and interference resistance. In the 0°–90° central angle bending scenario, the structure maintains good RCS reduction and antenna radiation properties, while also effectively reducing electromagnetic waves at 0°–45° angle, making it highly suitable for wider applications such as detection radar, satellite communications, and medical equipment.