Design of a transparent reconfigurable intelligent surface with photosensitive silicon
This dissertation presents the design and evaluation of a transparent reconfigurable intelligent surface (RIS) controlled by photosensitive silicon. The RIS unit cell is initially designed with a split-ring resonator (SRR) structure using photosensitive silicon, enabling precise control of reflectio...
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| Format: | Thesis-Master by Coursework |
| Language: | English |
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Nanyang Technological University
2023
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| Online Access: | https://hdl.handle.net/10356/171955 |
| _version_ | 1826117752742477824 |
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| author | Lu, Mingyan |
| author2 | Shen Zhongxiang |
| author_facet | Shen Zhongxiang Lu, Mingyan |
| author_sort | Lu, Mingyan |
| collection | NTU |
| description | This dissertation presents the design and evaluation of a transparent reconfigurable intelligent surface (RIS) controlled by photosensitive silicon. The RIS unit cell is initially designed with a split-ring resonator (SRR) structure using photosensitive silicon, enabling precise control of reflection and transmission amplitudes. However, this design exhibits limited phase tuning capabilities. To overcome this limitation, an
improved RIS cell design is proposed by replacing the SRR structure with square silicon rings. This modification enhances the phase adjustment range of the RIS unit, enabling a wider range of phase variations. Experimental results demonstrate that the improved RIS unit, under the irradiation of a 500mW pump light source at a frequency of 28GHz, achieves a reflection amplitude exceeding 90% and a 360-degree adjustable phase.
Based on the enhanced RIS unit, two beamforming methods are introduced. The first method utilizes the distance between substrates to design the beamforming deflection angle, while the second method considers the angle of the lower substrate. These methods exploit the improved phase adjustment capabilities of the RIS unit. The effectiveness of the proposed methods is validated through the construction of 12x12 and 9x9 RIS array models, achieving accurate beamforming at the desired angles. The aperture efficiencies of the implemented methods are measured to be 83.40% and
95.17%, respectively. |
| first_indexed | 2024-10-01T04:32:30Z |
| format | Thesis-Master by Coursework |
| id | ntu-10356/171955 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:32:30Z |
| publishDate | 2023 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1719552023-11-17T15:45:19Z Design of a transparent reconfigurable intelligent surface with photosensitive silicon Lu, Mingyan Shen Zhongxiang School of Electrical and Electronic Engineering EZXShen@ntu.edu.sg Engineering::Electrical and electronic engineering This dissertation presents the design and evaluation of a transparent reconfigurable intelligent surface (RIS) controlled by photosensitive silicon. The RIS unit cell is initially designed with a split-ring resonator (SRR) structure using photosensitive silicon, enabling precise control of reflection and transmission amplitudes. However, this design exhibits limited phase tuning capabilities. To overcome this limitation, an improved RIS cell design is proposed by replacing the SRR structure with square silicon rings. This modification enhances the phase adjustment range of the RIS unit, enabling a wider range of phase variations. Experimental results demonstrate that the improved RIS unit, under the irradiation of a 500mW pump light source at a frequency of 28GHz, achieves a reflection amplitude exceeding 90% and a 360-degree adjustable phase. Based on the enhanced RIS unit, two beamforming methods are introduced. The first method utilizes the distance between substrates to design the beamforming deflection angle, while the second method considers the angle of the lower substrate. These methods exploit the improved phase adjustment capabilities of the RIS unit. The effectiveness of the proposed methods is validated through the construction of 12x12 and 9x9 RIS array models, achieving accurate beamforming at the desired angles. The aperture efficiencies of the implemented methods are measured to be 83.40% and 95.17%, respectively. Master of Science (Communications Engineering) 2023-11-17T04:46:11Z 2023-11-17T04:46:11Z 2023 Thesis-Master by Coursework Lu, M. (2023). Design of a transparent reconfigurable intelligent surface with photosensitive silicon. Master's thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/171955 https://hdl.handle.net/10356/171955 en application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Electrical and electronic engineering Lu, Mingyan Design of a transparent reconfigurable intelligent surface with photosensitive silicon |
| title | Design of a transparent reconfigurable intelligent surface with photosensitive silicon |
| title_full | Design of a transparent reconfigurable intelligent surface with photosensitive silicon |
| title_fullStr | Design of a transparent reconfigurable intelligent surface with photosensitive silicon |
| title_full_unstemmed | Design of a transparent reconfigurable intelligent surface with photosensitive silicon |
| title_short | Design of a transparent reconfigurable intelligent surface with photosensitive silicon |
| title_sort | design of a transparent reconfigurable intelligent surface with photosensitive silicon |
| topic | Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/171955 |
| work_keys_str_mv | AT lumingyan designofatransparentreconfigurableintelligentsurfacewithphotosensitivesilicon |