Absorptive angle-selective surfaces
This study delves into the innovative design and simulation of absorptive angle-selective surfaces (AASS) implemented based on periodically arrangements of planar conductive elements, presenting a paradigm shift in spatial filtering of electromagnetic waves. The crux of our approach lies in the met...
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| Format: | Thesis-Master by Coursework |
| Language: | English |
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Nanyang Technological University
2024
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| Online Access: | https://hdl.handle.net/10356/173716 |
| _version_ | 1826116680191836160 |
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| author | Qin, Xiong |
| author2 | Shen Zhongxiang |
| author_facet | Shen Zhongxiang Qin, Xiong |
| author_sort | Qin, Xiong |
| collection | NTU |
| description | This study delves into the innovative design and simulation of absorptive angle-selective surfaces (AASS) implemented based on periodically arrangements of planar conductive elements, presenting a paradigm shift in spatial filtering of electromagnetic waves.
The crux of our approach lies in the meticulous network analysis of multi-layer periodic structures, comprising N layers of periodic structures and N − 1 air spacers. This analytical model allows for precise determination of each layer’s complex impedance, pivotal for achieving desired transmission, reflection, and absorption characteristics. We propose a dual-layer polarization-insensitive AASS model, where one layer exhibits resistive properties, achieving high absorption near the operating frequencies, while the other, a conductive layer, facilitates significant reflection (reflective AASS) or transmission (transmissive AASS).
Our study extends to include the exploration of unit cells, where cross-dipoles are identified as optimal for realizing angular selectivity. Computational simulations have been conducted to validate our theoretical models. Results demonstrate a notable absorptive bandwidth near 10 GHz, with significant backward angular selectivity, rendering the design ideal for diverse applications, including but not limited to, radar cross-section reduction and wireless communications.
This comprehensive analysis and simulation not only bolster the understanding of AASS but also open avenues for future research, particularly in enhancing bandwidth and angular domain behavior. The amalgamation of theoretical modeling and empirical simulations in this study provides a robust foundation for the development of advanced spatial filtering technologies. |
| first_indexed | 2024-10-01T04:15:40Z |
| format | Thesis-Master by Coursework |
| id | ntu-10356/173716 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:15:40Z |
| publishDate | 2024 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1737162024-03-01T15:44:15Z Absorptive angle-selective surfaces Qin, Xiong Shen Zhongxiang Tan Soon Yim School of Electrical and Electronic Engineering EZXShen@ntu.edu.sg, ESYTAN@ntu.edu.sg Engineering Frequency selective surface Metamaterial Meta-surface Antenna Electromagnetic selective surface This study delves into the innovative design and simulation of absorptive angle-selective surfaces (AASS) implemented based on periodically arrangements of planar conductive elements, presenting a paradigm shift in spatial filtering of electromagnetic waves. The crux of our approach lies in the meticulous network analysis of multi-layer periodic structures, comprising N layers of periodic structures and N − 1 air spacers. This analytical model allows for precise determination of each layer’s complex impedance, pivotal for achieving desired transmission, reflection, and absorption characteristics. We propose a dual-layer polarization-insensitive AASS model, where one layer exhibits resistive properties, achieving high absorption near the operating frequencies, while the other, a conductive layer, facilitates significant reflection (reflective AASS) or transmission (transmissive AASS). Our study extends to include the exploration of unit cells, where cross-dipoles are identified as optimal for realizing angular selectivity. Computational simulations have been conducted to validate our theoretical models. Results demonstrate a notable absorptive bandwidth near 10 GHz, with significant backward angular selectivity, rendering the design ideal for diverse applications, including but not limited to, radar cross-section reduction and wireless communications. This comprehensive analysis and simulation not only bolster the understanding of AASS but also open avenues for future research, particularly in enhancing bandwidth and angular domain behavior. The amalgamation of theoretical modeling and empirical simulations in this study provides a robust foundation for the development of advanced spatial filtering technologies. Master's degree 2024-02-26T02:26:10Z 2024-02-26T02:26:10Z 2024 Thesis-Master by Coursework Qin, X. (2024). Absorptive angle-selective surfaces. Master's thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/173716 https://hdl.handle.net/10356/173716 en application/pdf Nanyang Technological University |
| spellingShingle | Engineering Frequency selective surface Metamaterial Meta-surface Antenna Electromagnetic selective surface Qin, Xiong Absorptive angle-selective surfaces |
| title | Absorptive angle-selective surfaces |
| title_full | Absorptive angle-selective surfaces |
| title_fullStr | Absorptive angle-selective surfaces |
| title_full_unstemmed | Absorptive angle-selective surfaces |
| title_short | Absorptive angle-selective surfaces |
| title_sort | absorptive angle selective surfaces |
| topic | Engineering Frequency selective surface Metamaterial Meta-surface Antenna Electromagnetic selective surface |
| url | https://hdl.handle.net/10356/173716 |
| work_keys_str_mv | AT qinxiong absorptiveangleselectivesurfaces |