An ultra-thin dual-band phase-gradient metasurface using hybrid resonant structures for backward RCS reduction

作者：Cheng, Yongzhi^*; Wu, Chenjun; Ge, Chenchen; Yang, Jiaji; Pei, Xiaojun; Jia, Fan; Gong, Rongzhou

来源：Applied Physics B: Lasers and Optics , 2017, 123(5): 143.

DOI：10.1007/s00340-017-6728-5

• COHERENT PERFECT ABSORPTION
• SPLIT-RING RESONATORS
• BROAD-BAND
• SURFACE
• DESIGN
• DISCONTINUITIES
• METAMATERIALS

We introduce and investigate, both experimentally and theoretically, a dual-band phase-gradient meta-surface (PGM) to accurately facilitate dual-band beams deflection for electromagnetic waves. The designed PGM is composed of two kinds of split-ring resonators as the basic element of a super cell. These hybrid resonant structures can generate phase gradients at two distinct frequencies, which, in turn, generate appropriately artificial wave vectors that meet the requirements for anomalous reflection in terms of generalized Snell's law. Both simulations and experiments are consistent with the theoretical predictions. Further, this PGM can work at 8.9 and 11.4 GHz frequencies providing a phenomenon of anomalous reflection, which is useful for backward radar cross section reduction.

• 出版日期2017-5
• 单位浙江大学; 武汉科技大学; 华中科技大学