S. Sivagnanam, E. Gnanamanoharan, and B. Tapasvi. “Design and Performance Analysis of Tri-Band Circular Patch Antenna With Different Substrate Materials for Wireless Application”. Advance Research in Analog and Digital Communications, Dec. 2024, pp. 16-31, https://matjournals.net/engineering/index.php/ARADC/article/view/1206.