P. J. Low, F. Esa, K. Y. You, and Z. Abbas, “Estimation of Dielectric Constant for Various Standard Materials using Microstrip Ring Resonator”, jst, vol. 9, no. 3, Dec. 2017, Accessed: Jul. 01, 2024. [Online]. Available: https://publisher.uthm.edu.my/ojs/index.php/JST/article/view/2047