Analysis of circular ring frequency selective surface at Ka/Ku band

Multi-Semicircle-Based Single- and Dual-Band Frequency-Selective Surfaces: Achieving Narrower Bandwidth and Improved Oblique Incidence Angular Stability

“…Fig. 4 presents a comparison between the proposed FSS against square, ring and swastika designs [5][6][7], at normal and 45 • oblique incidences. In all unit cells, the same line thick-ness and gap dimensions, namely t = 1mm and g = 1mm, were assumed.…”

“…Classical FSS unit cell designs, such as square, ring or cross-dipoles, are used due to their simplistic design and overall good performance. Complex versions of these designs such as convolutions, fractals, or even other unrelated designs, are also employed for an improved frequency response, angular selectivity or other desired performance factors [2][3][4][5][6][7][8][9][10][11][12]. Usually, discrete components are used to switch between FSS states, in either single-or dualband frequency responses.…”