This work presents a compact microstrip patch antenna design for 5G applications, which operates in 25 GHz, 28 GHz, and 32 GHz frequency bands and provides triple-band functionality. The proposed antenna has a compact volume of 15.4 × 12.8 × 1 mm, contributing to its miniaturization, which is crucial for 5G communication systems. To optimize return loss characteristics, a line slot is introduced on the patch. The slot width is optimized using an XGBoost prediction model, which serves as an objective function for a Coati optimization technique. This optimization aims to achieve an optimal slot length that results in a superior return loss of -30 dB. The proposed antenna shows a peak gain of 7.3 dB at 28 GHz and exhibits an exceptional radiation efficiency of 98 %. The design and manufacture of this antenna validates its high gain and superior return loss in the specified triple bands, making it suitable for reliable and efficient 5G communication systems. The combination of compact size, high gain, and efficient return loss optimization ensures that this antenna meets the demanding requirements of modern 5G technology. The use of advanced optimization techniques, such as the XGBoost prediction model and Coati optimization, highlights the innovative approach of this design. This methodology not only improves the antenna's performance but also ensures that it can be effectively integrated into compact 5G devices, providing robust and high-quality communication capabilities. The success of this design underlines its potential for widespread application in the rapidly evolving field of 5G communications and offers a promising solution for future wireless technologies.
