A single-layer dual-band miniaturized frequency selective surface with compact structure

A novel single-layer dual-band frequency selective surface (FSS) with miniaturized periodic element is proposed and analyzed. Using two symmetric patterns of metallic fractal lines printed on single layer, FSS centered at 4.05 GHz and 5.30 GHz is designed. The simulated results from CST Microwave Solver indicate that the whole dimension of the proposed FSS element is only 7×7mm2, amount to 0.094λ0 × 0.094λ0, where λ0 stands for free space wavelength at first resonant band. Besides, the center frequencies of two bands have scarcely any changes for different polarizations and incidences. The design of the FSS gets a well balance between miniaturization and dual-band. The measured results are in good agreement with the simulated.