Novel frequency selective structures based on a two-dimensional periodic array of vertical microstrip lines

A novel frequency selective structure (FSS) consisting of a two-dimensional (2-D) periodic array of vertical microstrip lines has been proposed. Under plane wave incidence whose polarization is perpendicular to the strips, this array supports two quasi-TEM modes. Controlling the propagation constant...

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Main Author: Amir Khurrum Rashid
Other Authors: Shen Zhongxiang
Format: Theses and Dissertations
Language:English
Published: 2011
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Online Access:https://hdl.handle.net/10356/43328
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-433282023-07-04T17:37:27Z Novel frequency selective structures based on a two-dimensional periodic array of vertical microstrip lines Amir Khurrum Rashid Shen Zhongxiang School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering::Antennas, wave guides, microwaves, radar, radio A novel frequency selective structure (FSS) consisting of a two-dimensional (2-D) periodic array of vertical microstrip lines has been proposed. Under plane wave incidence whose polarization is perpendicular to the strips, this array supports two quasi-TEM modes. Controlling the propagation constants and the coupling of these modes with air, it is possible to obtain a quasi-elliptic filtering response. Further, due the existence of quasi-TEM modes, it is easy to use the unit-cells of sub-wavelength size, which leads to stable performance under large variation of the angle of incidence. This FSS has been investigated using an efficient full-wave mode-matching method. The analysis comprises two parts. First, the propagation characteristics of the 2-D array are studied by solving a unit-cell of this structure, which is sandwiched between two periodic boundaries. In the second part, an air-to-array discontinuity is solved using Floquet modes in the air-region. Based on the full-wave analysis, a number of FSSs have been fabricated, which exhibit stable quasi-elliptic filtering response under a large variation of the angle of incidence. Results of the full-wave analysis are in excellent agreement with those obtained from measurements and CST Microwave Studio. Further, a wideband circuit analogue microwave absorber has also been proposed which is based on a similar structure, and exhibits more than 110% bandwidth. DOCTOR OF PHILOSOPHY (EEE) 2011-03-09T07:40:20Z 2011-03-09T07:40:20Z 2011 2011 Thesis Amir, K. R. (2011). Novel frequency selective structures based on a two-dimensional periodic array of vertical microstrip lines.Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/43328 10.32657/10356/43328 en 174 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering::Antennas, wave guides, microwaves, radar, radio
spellingShingle DRNTU::Engineering::Electrical and electronic engineering::Antennas, wave guides, microwaves, radar, radio
Amir Khurrum Rashid
Novel frequency selective structures based on a two-dimensional periodic array of vertical microstrip lines
description A novel frequency selective structure (FSS) consisting of a two-dimensional (2-D) periodic array of vertical microstrip lines has been proposed. Under plane wave incidence whose polarization is perpendicular to the strips, this array supports two quasi-TEM modes. Controlling the propagation constants and the coupling of these modes with air, it is possible to obtain a quasi-elliptic filtering response. Further, due the existence of quasi-TEM modes, it is easy to use the unit-cells of sub-wavelength size, which leads to stable performance under large variation of the angle of incidence. This FSS has been investigated using an efficient full-wave mode-matching method. The analysis comprises two parts. First, the propagation characteristics of the 2-D array are studied by solving a unit-cell of this structure, which is sandwiched between two periodic boundaries. In the second part, an air-to-array discontinuity is solved using Floquet modes in the air-region. Based on the full-wave analysis, a number of FSSs have been fabricated, which exhibit stable quasi-elliptic filtering response under a large variation of the angle of incidence. Results of the full-wave analysis are in excellent agreement with those obtained from measurements and CST Microwave Studio. Further, a wideband circuit analogue microwave absorber has also been proposed which is based on a similar structure, and exhibits more than 110% bandwidth.
author2 Shen Zhongxiang
author_facet Shen Zhongxiang
Amir Khurrum Rashid
format Theses and Dissertations
author Amir Khurrum Rashid
author_sort Amir Khurrum Rashid
title Novel frequency selective structures based on a two-dimensional periodic array of vertical microstrip lines
title_short Novel frequency selective structures based on a two-dimensional periodic array of vertical microstrip lines
title_full Novel frequency selective structures based on a two-dimensional periodic array of vertical microstrip lines
title_fullStr Novel frequency selective structures based on a two-dimensional periodic array of vertical microstrip lines
title_full_unstemmed Novel frequency selective structures based on a two-dimensional periodic array of vertical microstrip lines
title_sort novel frequency selective structures based on a two-dimensional periodic array of vertical microstrip lines
publishDate 2011
url https://hdl.handle.net/10356/43328
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