DESIGN AND IMPLEMENTATION OF A RECONFIGURABLE INTELLIGENT SURFACE

Date

2024-8-27

Author

Şahin, Mükremin Barış

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The Reconfigurable Intelligent Surface (RIS) concept has gained increasing interest each year due to its potential benefits for 6G networks. The main advantages are the coverage area extension, suppression of unwanted signals, and improved channel rank condition. RIS is a planar surface consisting of several elements having highly precise phase distribution control to redirect the incident wave to required direction. In this thesis, a high-phase resolution unitcell and a RIS using this unitcell are designed. The proposed unitcell comprises a 3$\times$3 patch-like structure with pin diodes between them. The design incorporates a high number of bits, which significantly enhances its phase resolution, allowing for fine adjustments in phase to accurately control the direction and characteristics of the reflected wave. With this unit cell, number of control bits can be reduced to even one to reduce complexity in the implementation and control while still maintaining acceptable performance. Following the design of the unitcell, a RIS is constructed. The capabilities and limitations of the RIS are discussed to highlight its strengths and address any potential challenges or drawbacks. Finally, to validate the design, a physical prototypes of the RIS are produced and measured. It is demonstrated that the designed RIS can steer the main beam to the desired direction.

Subject Keywords

Reconfigurable Intelligent Surface, 6G, electromagnetic wave control, beam steering, programmable surface

URI

https://hdl.handle.net/11511/111299

Collections

Graduate School of Natural and Applied Sciences, Thesis