Browsing by Author "Bilgin, Gulsima"
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Item DESIGN AND IMPLEMENTATION OF HIGH GAIN MICROSTRIP ANTENNAS FOR SUB-GHZ BANDS(2022-02-14) Bilgin, Gulsima; Aydın, Elif; Kara, AliThis thesis presents design and production of multilayer microstrip antennas working at sub-GHz (the especially unlicensed band of ISM), yielding high gain. To increase the gain for the sub-GHz band, the multilayer antenna structure, keeping the dimen sion as small as possible, is considered the most appropriate method. Firstly, general background information about microstrip antenna is proposed and then, the theory of multilayer microstrip antenna is handled in detailed. In accordance with this purpose, different types of multilayer antenna designs are performed and one easy to fabricate is produced and measured. In addition, to investigate aesthetics and environmen tal adaptivity of the antenna, the antenna is placed into a metal box and covered by an outer substrate to be protected from harsh environmental conditions. This thesis also presents the electromagnetic numerical methods both theoretically and experi mentally. Finite element method (FEM) and finite integration technique (FIT) are explained and compared experimentally by using two commercial tools.