A Thin Self‐Feeding Janus Metasurface for Manipulating Incident Waves and Emitting Radiation Waves Simultaneously
Si Jia Li, Yun Bo Li, He Li, Zheng Xing Wang, Chen Zhang, Ze Xu Guo, Rui Qi Li, Xiang Yu Cao, Qiang Cheng, Tie Jun Cui
Abstract
Abstract A thin metasurface has shown powerful capabilities in controlling either incident electromagnetic (EM) waves or radiation waves, but is difficult for both. Here, a self‐feeding Janus metasurface (SFJ‐MS) is proposed to manipulate the incident EM waves and emit the radiated waves simultaneously, which can realize the polarization conversion of incident waves, scattering control, EM wave radiation, and radiation‐beam steering. On the upper of SFJ‐MS, a diagonal‐split square ring and a rectangular patch with rotation for radiation are designed to introduce anisotropy in the meta‐atom for converting the polarization of incident EM waves. On the bottom of SFJ‐MS, a self‐feeding microstructure converts the alternating current into the excitation of SFJ‐MS to emit the EM waves to free space. The multiple functions of SFJ‐MS are comprehensively substantiated by measured results, which are in agreements with the stringent simulations. This SFJ‐MS, with lightweight, compact, low profile, and power‐efficient features, can find potential applications in phased array radar systems, wireless communication systems, polarimetric radar imaging systems, and target detection systems.