Open AccessHigh‐power and low‐profile metamaterials for reflectarray based on ϵ ‐negative layer in X‐band
Author(s) -
Ma Xiao,
Yang Feng,
Yang Peng,
Wang Rui,
Yan Yi
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2019.3315
Subject(s) - metamaterial , phase shift module , x band , metamaterial antenna , optics , materials science , bandwidth (computing) , optoelectronics , microwave , broadside , dielectric , aperture (computer memory) , tunable metamaterials , physics , computer science , telecommunications , acoustics , insertion loss , directional antenna , antenna (radio) , slot antenna
The low‐profile reflectarray is proposed in this Letter based on the ϵ ‐negative metamaterial, whose units are mainly designed as two types for aperture phase‐tuning. A tri‐layer structure is investigated, which is composed of a ϵ ‐negative metamaterial sandwiched by two identical high‐ ϵ r dielectric slabs, and features characteristics of high power capacity, energy tunnelling and robustness against the incident angle of the electromagnetic wave. The simulation and experiment sufficiently demonstrated that the structure obtains high transparency rate at a relative bandwidth of 30 % , as well as a 1‐bit phase shift of 0 ° and 180 ° is achieved, which makes it potentially high‐power microwave spatial phase shifter and the linear‐polarisation radiator for reflectarray.