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Angle and polarization-independent miniaturized UWB FSS design

Published online by Cambridge University Press:  08 January 2021

Yanning Yuan
Affiliation:
The Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China
Yuchen Zhao
Affiliation:
The Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China
Xiaoli Xi*
Affiliation:
The Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China
*
Author for correspondence: Xiaoli Xi, E-mail: [email protected]

Abstract

A single-layer ultra-wideband (UWB) stop-band frequency selective surface (FSS) has several advantages in wireless systems, including a simple design, low debugging complexity, and an appropriate thickness. This study proposes a miniaturized UWB stop-band FSS design. The proposed FSS structure consists of a square-loop and metalized vias that are arranged on a single layer substrate; it has an excellent angle and polarization-independent characteristics. At an incident angle of 60°, the polarization response frequencies of the transverse electric and magnetic modes only shifted by 0.003 f0 and 0.007 f0, respectively. The equivalent circuit models of the square-loop and metallized vias structure are analysed and the accuracy of the calculation is evaluated by comparing the electromagnetic simulation. The 20 × 20 array constitutes an FSS reflector with a unit size of 4.2 mm × 4.2 mm (less than one-twentieth of the wavelength of 3 GHz), which realizes an UWB quasi-constant gain enhancement (in-band flatness is <0.5 dB). Finally, the simulation results were verified through sample processing and measurement; consistent results were obtained. The FSS miniaturization design method proposed in this study could be applied to the design of passband FSS (complementary structure), antennas and filters, among other applications.

Type
Antenna Design, Modelling and Measurements
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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