Tunable wideband absorber based on resistively loaded lossy high-impedance surface

Dang Ke-Zheng, Shi Jia-Ming†, Wang Jia-Chun, Lin Zhi-Dan, Wang Qi-Chao

(a) Photograph of the experiment sample. (b) Measured reflection losses of the structure with different unit cells (the unit cells on the right are depicted partially with only the center).