Miniaturized Notch-Loaded Patch Antenna for Highly Efficient Ku-Band Communication Systems

Abstract

This paper presents a comprehensive investigation of an extremely small rectangular patch antenna loaded with a notch, designed for Ku-band satellite communication applications. The antenna is implemented on an FR-4 substrate (εr = 4.4) with compact dimensions, ensuring low cost and mechanical stability. HFSS simulations validate the antenna’s performance, demonstrating dual operating bands of 15.73–16.40 GHz and 17.73–18.10 GHz, with resonant frequencies at 16.05 GHz and 17.71 GHz. The design achieves return losses of -18.86 dB and -46 dB, respectively, while maintaining VSWR values below 2, confirming excellent impedance matching. The proposed antenna exhibits peak gains of 7.04 dB and 4.80 dB across the two bands, with radiation efficiency of 69.40% and 49.47%. Radiation patterns show omnidirectional distribution across the azimuth plane, ensuring suitability for robust Ku-band communication. A comparative analysis with recent literature highlights the superior compactness and multiband performance of the proposed design, making it a strong candidate for next-generation aerospace and satellite communication systems.