Toward Abnormal Reflection by Ceramic Based All-Radient Gradient Metasurface

In this paper, an all-dielectric gradient metasurface (GM) consist of high-permittivity ceramic is designed. Cross-shaped ceramics with different sizes are used to compose a super unit, which arranged periodically in free space. An abnormal reflection is realized at 5.408GHz. The reflection angle is about 50°. Electric fields and power flow can verify the abnormal reflection. This kind of all-dielectric gradient metasurface has the advantages of resisting high temperature, high power. Our work provides a new method to achieve all-dielectric GMs in microwave band.