A novel cubic isotropic band-reject frequency selective surface

Unlike the traditional two-dimensional periodic arrays, a novel cubic frequency selective surface is proposed. For each unit, metal strips of a novel pattern are placed on dielectric substrates, and together form the six faces of a FSS cube, which is put in the middle of dielectric cubes. Simulation is conducted to analyze the characteristic of the FSS, and results are compared with traditional single-layer and double-layer FSSs of the same pattern and cubic FSS of split ring resonators (SRR). Results show that the novel cubic FSS has many advantages, such as better miniaturization, extremely low impedance for pass-band, excellent polarization stability and angle stability, and a wider bandwidth of high-impedance with respect to the SRR cubic FSS. Thus the FSS has more potential applications in antenna technology at microwave and terahertz frequencies.