“…Based on the structure, the FSSs commonly employed in millimeter and submillimeter wave bands can be classified into three categories: single-layer [11][12][13][14][15][16], multi-layer [17][18][19][20][21][22], and 3D FSSs [23][24][25][26][27]. Due to the simplicity of production and analysis, single-layer FSSs are widely utilized, particularly in the design of sensors and conformal FSSs [28,29], wireless and satellite communication [30,31], radio telescope systems [12,32], etc.…”