Aynoi, Ekkapap, Narong Nanthakusol, Ratapon Jeenawong, Chuwong Phongcharoenpanich, and Supakit Kawdungta. 2021. “Vertical Beam Adjustable Antenna for Internet of Things Applications”. Engineering and Technology Horizons 38 (2):1-8. https://ph01.tci-thaijo.org/index.php/lej/article/view/244263.