DESIGN OF ULTRA-WIDEBAND (2-18 GHz) BUTLER MATRIX
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This thesis presents the design of an ultra-wide band hybrid coupler, crossover and phase shifters for the design of four-input, four-output (4x4) stripline Butler matrix in order to feed an antenna array in 2-18 GHz frequency range. The goal of this thesis is to develop an antenna-array feeding passive microwave network based on Butler matrix with a ultra-wide bandwidth which works as ground work for realization of eight input, eight output Butler matrix. Further the 4x4 and 8x8 Butler matrix can be used in a row-card configuration to realize 16x16 and 64x64 Butler matrix. In order to meet the ultrawide band requirements, wide band passive microwave components such as hybrid coupler, crossovers and phase-shifters are designed, which operate from 2 to 18 GHz. The Butler matrix can be used as a beam-forming network produces orthogonal beams which can be steered in different directions.
Singh, Inderdeep (2019). DESIGN OF ULTRA-WIDEBAND (2-18 GHz) BUTLER MATRIX. Master's thesis, Texas A&M University. Available electronically from