Design and implementation of 8X8 wideband and single-layer Butler matrix for multi-beam antenna arrays

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For future multiple-beam-forming antenna array applications, our industrial partner, Kaytus Technologies Inc., is interested in designing a new Butler matrix that will be used as a beamformer. Such beam-former will be employed in Kaytus Technologies' beam-forming antenna array systems for wireless communications. In this perspective, we propose in this project to design and develop a compact printed 8X8 wideband and single-layer Butler matrix for multi-beam antenna arrays operating in the band from 5.15 to 5.85 GHz. In this project, Kaytus Technologies Inc. will provide research support and guidance to the researcher throughout the project. Furthermore, the project will capitalize on the advanced RF laboratory facility funded by the Canada Foundation for Innovation (CFI) and the Quebec government. The requested support from NSERC would allow the proposed team to design and develop compact and single-layer Butler matrix for future beam-forming antenna array systems. The Butler matrix design should be compact, use only a single layer substrate and provide a large bandwidth. With these features, the proposed Butler matrix can be used in beam-forming antenna array systems to cover wireless communications in the band from 5.15 to 5.85 GHz. To cope with this challenge, the proposed research will focus on three parts: (i) an intensive literature review will be carried out on broad Butler matrices in order to identify the potential candidates; (ii) a design and analysis will be carried out to develop compact wide bandwidth Butler matrix, and (iii) prototyping and characterization of the proposed Butler matrix. The developed technology will be beneficial to Kaytus Technologies Inc. and the Canadian space industry in general by efficiently contributing in the development of new wide bandwidth Butler matrices for beam-forming antenna array applications.