Chan, Yi Lin, Fahmiruddin Esa, Kok Yeow You, Rosmila Abdul Kahar, and Zulkifly Abbas. “Complex Permittivity of Materials at Broadband Frequency Using Transmission Phase Shift Method”. Journal of Science and Technology 9, no. 3 (December 26, 2017). Accessed July 1, 2024. https://publisher.uthm.edu.my/ojs/index.php/JST/article/view/2059.