A novel polarization converter based on the band-stop frequency selective surface

Abstract

A dual-passband single-polarized converter based on the band-stop frequency selective surface (FSS) with a low radar cross-section (RCS) is designed in this article. The unit cell of the proposed converter is formed by a polarization layer attached to the band-stop frequency selective surface. The simulation results reveal that the co-polarization reflection coefficients below −10 dB are achieved in 3.82–13.64 GHz with a 112.4% fractional bandwidth (the ratio of the signal bandwidth to the central frequency). Meanwhile, a polarization conversion band is realized from 8.14 GHz to 9.27 GHz with a polarization conversion ratio which is over 80%. Moreover, the 1 dB transmission window is obtained in two non-adjacent bands of 3.42–7.02 GHz and 10.04–13.91 GHz corresponding to the relative bandwidths of 68.9% and 32.3%, respectively. Furthermore, the radar cross-section of the designed structure can be reduced in the wideband from 2.28 GHz to 14 GHz, and the 10 dB RCS reduction in the range of 4.10–13.35 GHz is achieved. In addition, the equivalent circuit model of this converter is established, and the simulation results of the Advanced Design System (ADS) match well with those of CST Microwave Studio (CST). The archetype of the designed converter is manufactured and measured. The experiment results match the simulation results well, which proves the reliability of the simulation results.

Intelligent electromagnetic mapping via physics driven and neural networks on frequency selective surfaces

“…To uncover the EM mappings between various structures and beam properties in an intuitive and simple way, Marcuvitz [34] proposed the classical equivalent circuit model (C-ECM), in which the structures with infinite length were intuitively regarded as cascades of lumped elements. Since then, the theory of equivalent circuit models (ECMs) has been extensively optimized and introduced into analyzing complex structures [9,[35][36][37][38][39][40][41][42][43][44][45]. Unlike the C-ECM, later models concentrated on finite length structures, which were still based on the C-ECM but beyond the application scope.…”

A multifunctional metasurface with broadband absorption and high-efficiency transmission polarization conversion

“…Polarization is one of the characteristics of EM waves, and the regulation of different polarized waves is also one of the research hotspots. Reflection-type polarization conversion [20,21] is achieved by setting up a 45°r ectangular metal patch and allowing EM waves to break up in the orthogonal direction. In [22,23], a three-layer structure is proposed.…”