Modified Gerchberg-Saxton Iterative Algorithm for Reflectarray Metasurface Multibeam Pattern Synthesis
This paper presents a modified Gerchberg-Saxton (GS) iterative algorithm applied to the pattern synthesis of reconfigurable intelligent surfaces (RIS). Specifically, a scalar Fresnel-like transform pair that is specifically designed to fulfill the demands of RIS applications is developed; this trans...
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| Vydáno v: | IEEE Vehicular Technology Conference s. 1 - 5 |
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01.06.2022
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| Abstract | This paper presents a modified Gerchberg-Saxton (GS) iterative algorithm applied to the pattern synthesis of reconfigurable intelligent surfaces (RIS). Specifically, a scalar Fresnel-like transform pair that is specifically designed to fulfill the demands of RIS applications is developed; this transform pair allows the farfield to be expressed in angular terms, while the nearfield remains in the planar form. The paper presents analytical and full-wave results that are based on a 108 GHz liquid crystal (LC)-based 20x20 reconfigurable reflectarray metasurface model, which is intended for applications in THz wireless communications. The synthesized beams presented include: amplitude-variable four-beam multibeam, seven-beam vortex multibeam, and circular beam. Compared to traditional beam synthesis methods, such as the genetic algorithm (GA) and the particle swarm optimization (PSO), the modified GS algorithm proved to be much faster in performing RIS beam synthesis. Additionally, GS also has the additional advantage of not needing a meticulously designed analytical cost function to perform effectively. |
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| AbstractList | This paper presents a modified Gerchberg-Saxton (GS) iterative algorithm applied to the pattern synthesis of reconfigurable intelligent surfaces (RIS). Specifically, a scalar Fresnel-like transform pair that is specifically designed to fulfill the demands of RIS applications is developed; this transform pair allows the farfield to be expressed in angular terms, while the nearfield remains in the planar form. The paper presents analytical and full-wave results that are based on a 108 GHz liquid crystal (LC)-based 20x20 reconfigurable reflectarray metasurface model, which is intended for applications in THz wireless communications. The synthesized beams presented include: amplitude-variable four-beam multibeam, seven-beam vortex multibeam, and circular beam. Compared to traditional beam synthesis methods, such as the genetic algorithm (GA) and the particle swarm optimization (PSO), the modified GS algorithm proved to be much faster in performing RIS beam synthesis. Additionally, GS also has the additional advantage of not needing a meticulously designed analytical cost function to perform effectively. |
| Author | Young, Rupert Nekovee, Maziar Meng, Xiaomin |
| Author_xml | – sequence: 1 givenname: Xiaomin surname: Meng fullname: Meng, Xiaomin email: xm51@sussex.ac.uk organization: 6G Lab University of Sussex,School of Engineering and Informatics,Brighton,UK – sequence: 2 givenname: Rupert surname: Young fullname: Young, Rupert email: r.c.d.young@sussex.ac.uk organization: University of Sussex,Department of Engineering and Design,Brighton,UK – sequence: 3 givenname: Maziar surname: Nekovee fullname: Nekovee, Maziar email: m.nekovee@sussex.ac.uk organization: 6G Lab University of Sussex,School of Engineering and Informatics,Brighton,UK |
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| Snippet | This paper presents a modified Gerchberg-Saxton (GS) iterative algorithm applied to the pattern synthesis of reconfigurable intelligent surfaces (RIS).... |
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| SubjectTerms | Computational modeling Gerchberg-Saxton metasurfaces Particle beams pattern synthesis phase retrieval reconfigurable intelligent surfaces reflectarray Solid modeling Three-dimensional displays THz Transforms Vehicular and wireless technologies Wireless communication |
| Title | Modified Gerchberg-Saxton Iterative Algorithm for Reflectarray Metasurface Multibeam Pattern Synthesis |
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