scholarly journals Highly-selective, closely-spaced, tri-band bandpass three-dimensional frequency selective surface

2020 ◽  
Vol 17 (13) ◽  
pp. 20200153-20200153
Author(s):  
Zhengyong Yu ◽  
Wanchun Tang ◽  
Yuehua Li ◽  
Jianping Zhu
Keyword(s):  
Three Dimensional ◽  
Frequency Selective Surface ◽  
Frequency Selective

A Third-Order Bandpass Three-Dimensional Frequency Selective Surface with Multiple Transmission Zeros

2021 ◽  
Vol 35 (12) ◽  
pp. 1548-1555
Author(s):  
Zhengyong Yu ◽  
Wanchun Tang
Keyword(s):  
Electromagnetic Coupling ◽  
Three Dimensional ◽  
Equivalent Circuit Model ◽  
Frequency Selective Surface ◽  
Unit Cell ◽  
Third Order ◽  
Transmission Zeros ◽  
Working Principle ◽  
Frequency Selective ◽  
Multiple Transmission

We present a third-order bandpass three-dimensional frequency selective surface (3D FSS) with multiple transmission zeros in this paper. The unit cell of the proposed 3D FSS consists of an air-filled square waveguide and a cuboid dielectric block with three concentric metallic square loops. Due to its inner electromagnetic coupling in the unit cell, this FSS provides a flat passband with three transmission poles, a wide out-of-band rejection with three transmission zeros, and high frequency selectivity. In order to explain the working principle, an equivalent circuit model is established and investigated. Finally, an FSS prototype is fabricated and measured, and the results exhibit good stability for both TE and TM polarizations under incident angles from 0° to 50°. Besides, this FSS has a relatively compact unit cell.

Design of angular and polarization stable modified circular ring frequency selective surface for satellite communication system

2015 ◽  
Vol 8 (6) ◽  
pp. 899-907 ◽  
Author(s):  
Garima Bharti ◽  
Kumud Ranjan Jha ◽  
Ghanshyam Singh ◽  
Rajeev Jyoti
Keyword(s):  
Satellite Communication ◽  
Three Dimensional ◽  
Frequency Selective Surface ◽  
Circular Ring ◽  
System Level ◽  
Geometrical Parameters ◽  
Small Unit ◽  
Transmission Coefficients ◽  
Synthesis Technique ◽  
Frequency Selective

In this paper, a simple synthesis technique to obtain the geometrical parameters of the modified circular ring for angular and polarizations (perpendicular and parallel) stable frequency selective surface (FSS) has been discussed. The geometrical parameters of the modified circular ring FSS structure have been achieved using the proposed synthesis technique, which is based on the equivalent circuit (EC) approach. In addition to this, the numerical analysis is also discussed to determine the values of EC parameters, which depends on the basic system level characteristics such as frequency of operation and reflection/transmission coefficients. The analytical results are supported using the full-wave three-dimensional electromagnetic (EM) simulators such as CST Microwave Studio and Ansoft HFSS. The sensitivity of the structure to the perpendicular and parallel polarized EM wave up to 50° angle-of-incidences (AOIs) has been discussed. The stability over different AOI is attributed to the appropriate thickness of the structure with its small unit-cell dimensions. We have also fabricated and experimentally tested the proposed FSS structure.

scholarly journals Frequency-selective surface acoustic invisibility for three-dimensional immersed objects

2012 ◽  
Vol 86 (17) ◽  
Author(s):  
Mohamed Farhat ◽  
Pai-Yen Chen ◽  
Sébastien Guenneau ◽  
Stefan Enoch ◽  
Andrea Alù
Keyword(s):  
Three Dimensional ◽  
Frequency Selective Surface ◽  
Frequency Selective
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