Tripole type wideband bandpass frequency selective surface for X‐band applications

Design of miniaturized 2.5D frequency selective surface for X‐ and Ku‐band applications

“…3 Most of the time, lumped elements and fractal methods are used to increase bandwidth coverage area, and they work well. Compared to 2D FSS [4][5][6] and 3D FSS designs, 7 2.5D FSS design can give more advantages, such as reduced FSS array size and increased bandwidth coverage area, so in recent years more applications have focused on 2.5D FSS. In 2.5D FSS design, equivalent reactance is further increased by adding metal via holes and interlayer couplings.…”

Design of an ultra‐broadband microwave metamaterial absorber based on multilayer structures

“…Many multilayer units have been proposed to achieve wideband absorption or radar cross‐section (RCS) reduction 14–26 . An ordinary design idea is to combine multiple single‐band (SB) absorbers operating in different frequencies using a multi‐layer structure and ultimately achieve absorption in the broadband range.…”

“…12,13 Many multilayer units have been proposed to achieve wideband absorption or radar cross-section (RCS) reduction. [14][15][16][17][18][19][20][21][22][23][24][25][26] An ordinary design idea is to combine multiple single-band (SB) absorbers operating in different frequencies using a multi-layer structure and ultimately achieve absorption in the broadband range. A pyramid absorber consisting of 10 layers of SB absorber structures is proposed, 14 which achieves a high absorption rate (>90%) in X-band and Ku-band with a fractional bandwidth of 71% and the total thickness is 0.26 λ L at the lowest operating frequency.…”