Electrical Electronics and ICT Faculty

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    Design Double Layer Aerial With Lens For Millimeter Wave Image Detection Systems
    (2026) Ehtinat Amisalu
    There has been significant interest in millimeter-wave systems used in detection of concealed images. security, medical and industrial fields because of their ability to detect concealed items with. minimal penetration loss. Current antenna designs, i.e. single-layer patch antennas. Slot designs, and APSAs have low gain, small bandwidth, low directivity, and are generally low gain. restrained detection range, and hence less image resolution and fidelity. To overcome these challenges, this work is a patch antenna of circular form on the double-layer with an inbuilt lens, optimized at 24.411 GHz - the best millimeter-wave radio frequency to use in imaging. The High Frequency Structure Simulator (HFSS) was used to develop and simulate design. utilizing multi-layer layouts and lenses in order to increase radiation effectiveness and beam. focusing. Performance tests were taken to be of importance with regard to gain, directivity, and reflection. coefficient (S11), voltage standing wave ratio (VSWR) and bandwidth which were subsequently correlated.