A novel stable miniaturized band-reject frequency selective surface (FSS) is proposed in this paper. Compared to previous miniaturized structures, the dimension of the proposed FSS unit cell is only 0.050A_0 x 0.050A_o where A_0 represents the wavelength of the resonant frequency. And characteristics of the new structure are stable with respect to waves with different polarizations and incident angles. Simulation of structure with different parameters is also taken, and the results demonstrate the claimed performance and the possibility of better miniaturization by changing the parameters of the structure. Thus, the proposed structure is suitable for practical application in limited space.
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