Kok Yeow You, Yi Song Ng Derek, Chia Yew Lee, Zulkify Abbas, Ee Meng Cheng, Yeng Seng Lee, and Kim Yee Lee. 2020. “Low-Cost Vector Network Analyzer for Communication Devices Testing - Brief Review”. International Journal of Advances in Microwave Technology 2 (1):93-97. https://ijamt.com/index.php/ijamt/article/view/48.