A triple-band polarization-independent conformal absorber for C- and X-frequency bands have been presented. The designed absorber comprises a Jerusalem cross resonator at the center, surrounded by a quarter part of a square rings resonator with different sizes at each corner on a metal grounded dielectric substrate. The unit cell size is 0.23λ_o × 0.23λ_o and thickness of λ_o/153 at frequency 6.16 GHz. The absorption peaks were obtained at frequencies 6.16 GHz, 9.22 GHz, and 11.6 GHz with absorptivity 95%, 96%, and 97%, respectively. It exhibited full wave at half maximum (FWHM) bandwidths of 160 MHz bands (6.04 GHz–6.20 GHz, 240 MHz (9.09 GHz–9.33 GHz), and 260 MHz (11.57 GHz−11.83 GHz), respectively. The designed absorber is shown four-fold symmetry, which makes it polarization independent. Normalized impedance and surface current distributions for all three absorption frequencies are analyzed for understanding the absorption phenomenon. The designed absorber has been tested for the curved surfaces with different central angles to show its conformal behavior, and it is perceived that measured results and simulated results have good agreement between them.

提出了一种用于C和X波段的三波段偏振无关共形吸收体。设计的吸收器在中央包括一个耶路撒冷交叉谐振器，被方形接地谐振器的四分之一部分围绕，该谐振器在金属接地的电介质基板的每个角上具有不同的尺寸。晶胞尺寸是0.23λ _ö  ×0.23λ _ø和的厚度λ _ö/ 153，频率为6.16 GHz。在6.16 GHz，9.22 GHz和11.6 GHz频率处获得吸收峰，吸收率分别为95％，96％和97％。它展示了分别在160 MHz频段（6.04 GHz–6.20 GHz，240 MHz（9.09 GHz–9.33 GHz）和260 MHz（11.57 GHz-11.83 GHz）的一半最大（FWHM）带宽。四重对称性，使其独立于极化；分析了所有三个吸收频率的归一化阻抗和表面电流分布，以了解吸收现象；对设计的吸收器进行了不同中心角弯曲表面的测试，以显示其保形行为；并且可以看出，测量结果和模拟结果之间具有良好的一致性。