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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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 |
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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 |
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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. |
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Shen Zhongxiang |
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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 |
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https://hdl.handle.net/10356/43328 |
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1772828769804877824 |