Abstract: In order to enhance the performance of FSS(Frequency Selective Surfaces) and precisely control the propagation characteristics of electromagnetic waves in the microwave frequency range to achieve reflection, transmission, or absorption of electromagnetic waves, a miniaturized FSS for the microwave frequency band is proposed. The unit cell size of the FSS is 0.024λ x 0.024λ, demonstrating excellent miniaturization performance. Within the range of 1 ~10 GHz, the FSS exhibits three passbands with exceptional polarization stability and angle stability, maintaining consistent operating frequencies and bandwidth, while exhibiting good transmission performance. This study on the miniaturized FSS serves as a basis for FSS analysis and provides insights for the design of miniaturized frequency selective surfaces.

Key words: frequency selective surfaces, microwave frequency range, miniaturization, multi-band, free space test