A Miniaturized Frequency Selective Surface Based on Square Loop Aperture Element

Wenxing Li,Yong Zhang,Yingsong Li,Chunming Wang

doi:10.1155/2014/701279

Abstract

We propose a miniaturized band-pass frequency selective surface (FSS) with periodic unit cell structure. The proposed FSS is realized by symmetrically bending the edges of the square loop aperture element, by which our proposed FSS increases the resonant length, and, hence, reduces its size. In this FSS, each unit cell has a dimension of 0.0538λ × 0.0538λ, whereλrepresents the wavelength of the corresponding resonant frequency. Both the theoretical analysis and simulation results demonstrate that our proposed FSS, having high polarization stability and angle stability, can achieve smaller size in comparison with the previously proposed structures.

Highlights

Frequency selective surfaces (FSSs) are two-dimensional planar periodic structures which are realized by using patch or aperture elements to provide frequency filtering characteristic to incoming wave [1]
On the basis of the analysis, we propose a miniaturized FSS, which operates at 1.647 GHz
The simulation results are obtained by using the computer simulation technology (CST)

Summary

Introduction

Frequency selective surfaces (FSSs) are two-dimensional planar periodic structures which are realized by using patch or aperture elements to provide frequency filtering characteristic to incoming wave [1]. The size of a unit cell is so large that it is difficult to design a finite FSS array with sufficient number of elements in a finite space when the FSS is operating in a low frequency such as L-band. Yang et al reported an improved FSS by bending the edges of cross aperture element into the external space [7] and the size of each element was 0.061λ × 0.061λ All these unit cells are symmetrical in order to ensure the stability of the corresponding FSSs. the size of the FSS is still large for practical applications in very low frequency. The proposed FSS is realized by symmetrically bending the edges of the square loop aperture element to the inner space The simulation results demonstrate that our proposed FSS, having high polarization stability and angle stability, can achieve smaller size in comparison with the previously proposed structures

Fundamental of Miniaturized FSS

Results and Discussions

Stability Analysis of the Proposed Miniaturized FSS

Conclusion