Rohim, Siti Nabilah, and Rahmat Sanudin. “Investigation of Varactor Diode for Frequency Selectivity in Wireless Communication”. Evolution in Electrical and Electronic Engineering 3, no. 1 (June 15, 2022): 495–502. Accessed April 8, 2026. https://penerbit.uthm.edu.my/periodicals/index.php/eeee/article/view/6704.