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A dual-passband frequency selective surface (FSS) is presented. The complementary square loop resonators are used in each unit cell to obtain dual-passband response. The proposed FSS structure is independent of incident wave polarizations and angles because of centrosymmetric of the unit cell. The FSS exhibits dual-band response with −3dB bandwidth of 5.39GHz-6.31GHz and 11.85GHz-15.04GHz, respectively...
A second-order band-pass frequency selective surface is composed of three layers of periodic elements and two layers of dielectric with stable performances is presented. The outer layers are with hexagonal metallic patches while the middle layer is with hexagonal aperture. A simple lumped element model are derived and presented. A test sample is fabricated and measured to verify the design. This frequency...
In this letter, we propose a triband second-order frequency selective surface (FSS). Each second-order bandpass response is realized by a three-layer patch–aperture–patch (PAP) structure. The PAP elements with different sizes are then arranged to a unit cell that is to be repeated periodically. Based on this technique, an FSS unit cell with triband second-order response is designed. There is a respective...
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