Science and Technology on Antenna and Microwave Laboratory, Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, Xi’an, China
Ying Liu
Science and Technology on Antenna and Microwave Laboratory, Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, Xi’an, China
Wenbo Zhang
Science and Technology on Antenna and Microwave Laboratory, Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, Xi’an, China
Jun Wang
Beijing Electro-Mechanical Engineering Institute, Beijing, China
Shuxi Gong
Science and Technology on Antenna and Microwave Laboratory, Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, Xi’an, China
Guisheng Liao
National Laboratory of Radar Signal Processing, Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, Xi’an, China
The design of two high-gain Fabry–Perot antennas with wideband low monostatic radar cross section (RCS) is presented in this paper. First, a phase gradient metasurface (PGM) without lossy layer is used to realize in-band RCS reduction and high aperture efficiency, simultaneously. The simulated results show that its peak gain is 19.2 dBi, and a high aperture efficiency of 58.6% is achieved. By utilizing the PGM structure, the monostatic RCS is reduced from 7 to 11 GHz, and the in-band co-polarization RCS is reduced by 13.1 dB. After that, a PGM with metamaterial absorber is designed to broaden the bandwidth of RCS reduction. A prototype antenna is fabricated and measured. The peak gain of 17.9 dBi is obtained, and the monostatic RCS is reduced in a wider frequency band of 7–15 GHz.
