A compact quad-element serrated boundary fractal planar antenna for multi-band mmWave 5G/6G wireless applications - Tathababu Addepalli; Thota Vidyavathi; Maragani SatishKumar; Gudapati Divya; Morasa Balaji; Sivasubramanyam Medasani; Mohammad Sami Zidan; Imran Mohd Ibrahim; Ahmed Jamal Abdullah Al-Gburi (PLoS ONE, 2026)