Spectral-domain analysis of frequency selective surfaces comprised of periodic arrays of cross dipoles and Jerusalem crosses

A review of stealth technology for flying targets

“…Its superior performance and novel ideas attracted wide attention from scholars around the world. In 1980, R. ittra's team innovatively used spectral domain analysis to explore the problem of structure selection of frequency selective surfaces, focusing on the analysis of small-scale frequency selective surfaces and their performance in superimposed form [31][32] [33]. In the same period, the E.A.Perker team used equivalent circuit method to study frequency selective surfaces of different structures, creating unique design ideas and physical results [34][35] [36].…”

Wide angle terahertz sensing with a cross-dipole frequency selective surface

“…This dependence of the fundamental resonance with the angle of incidence under TE polarization is the classical behavior of cross-dipole and dipole FSS. [25][26][27][28] This shift can be explained by means of equivalent circuit approaches, as it was done in Ref. 28.…”

“…It can also be noticed the appearance of two small resonances in the spectrum near the fundamental resonance dip (they take place at 838 GHz and 877 GHz for the case Re{n a } ¼ 1). The second resonance corresponds to the bent mode occurring at oblique incidence angles and for TM polarization, 21,25,26 while the third resonance is related with the onset of the first grating lobe. The origin of the bent mode is the excitation of an asymmetrically induced current due to the coupling between the horizontal and vertical dipoles.…”

“…The origin of the bent mode is the excitation of an asymmetrically induced current due to the coupling between the horizontal and vertical dipoles. 25,26 The surface currents excited on the cross dipole for the fundamental and bent modes are displayed in Fig. 4(a) insets.…”

Instrumento para caracterização multidimensional de metasuperfícies

“…Assim, a seletividade da superfície se refere à seletividade espectral, embora o termo também possa ser usado para incluir a polarização (Young et al 1973). As estruturas ressonantes periódicas da FSS podem ser elementos metálicos quadrados (Wu and Lee 1994), cruzes (Tsao and Mittra 1984), laços ) ou fractais (Romeu and Rahmat-Samii 2000), geralmente impressos sobre substratos dielétricos. A Figura 7(a) apresenta um esquema de como funciona uma FSS.…”