Browsing by Author "Mesfin Berhanu"

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    Design and Performance Enhancement of Massive MIMO PIFA Arrays for 5G Wireless Communication Systems
    (2026) Mesfin Berhanu
    The rapid deployment of fifth-generation (5G) wireless communication systems has increased the demand for small-size, high-gain, and high-directivity antennas that can operate efficiently at millimeter wave frequencies. This thesis presents the design, simulation, and performance of single and massive MIMO Planar Inverted-F Antenna (PIFA) configurations with a resonant frequency of 28 GHz by using High Frequency Structural Simulator (ANSYS HFSS) software. Starting from a single PIFA element, the work systematically explores 1x2, 4x4, and 4x5 PIFA MIMO arrays in order to quantify the effect of array scaling on impedance matching, bandwidth, gain, directivity, and radiation behavior.