Design and application of conformal magnetic and graphene waveguide antenna

Ahmad, Abid
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This thesis investigates conformal magnetic and graphene waveguide antennas working at c-band for applications of wireless local area network (WLAN) and Wi-Fi networks. Antennas with magnetic material could be an extremely reliable and mature means for coupling and reshaping the incoming radiation pattern to increase the overall gain of the communication system. In this work, ferromagnetic paste and ink were developed, ferromagnetic thin film was deposited and characterized as DC and high frequency, in terms of conductivity, permittivity and permeability. The highest permittivity and permeability achieved are 12 and 29.5 respectively of strontium ferrite material. Then the measured data was used to design and simulate the ferromagnetic waveguide with High Frequency Structure Simulator (HFSS) software from ANSOFT. The simulation results of 25.4 cm × 17 cm × 0.0125 cm ferromagnetic antennas show improvement of signal gain of 1.1 dB over the source antenna. The graphene array antenna is also analyzed in order to show how the antenna changes the far field radiation pattern from a source since graphene’s resistance to harsh environment is one of the approaches to solve the transportation communication challenge. The graphene antenna is tested to verify the simulation results. The array of magnetic/graphene antenna is proved to enhance the incoming signal from the patch antenna to propagate it along the magnetic/graphene antenna structure.
Permeability, Permittivity, Antenna gain
Ahmad, A. (2020). <i>Design and application of conformal magnetic and graphene waveguide antenna</i> (Unpublished thesis). Texas State University, San Marcos, Texas.