Design of a dual polarized low profile antenna for microwave brain imaging

2022-5-9
Üçel, Kaan
In this thesis, a low profile, low cost, wide band (0.9-2GHz) dual linearly polarized printed dipole antenna is designed to be used in microwave brain imaging systems. Dual polarization feature offers superior data acquisition through polarization diversity for better image quality. Starting from a simple printed dipole, antenna structure is modified step by step to meet these design requirements. Since a conductive surface in close vicinity of the antenna affects antenna performance, in order to obtain unidirectional radiation from the dipole, instead of an electric conductor, a frequency selective surface (FSS) surface is utilized to obtain a low profile antenna. The designed antenna has 11x11x1.8 cm dimensions. The antenna is manufactured on a FR-4 substrate by laser etching machine. Return loss performance and radiation pattern characteristics are measured in an anechoic chamber. Measurement and simulation results have been compared with each other and satisfactory relevance is achieved.

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Citation Formats
K. Üçel, “Design of a dual polarized low profile antenna for microwave brain imaging,” M.S. - Master of Science, Middle East Technical University, 2022.