Nuangpirom P, Chaitanu K, Sidtigun N, Panhang T, Akatimagool S. The Study of Characteristics of the Waveguide Iris by using Printed Circuit Board. RMUTL.Eng.J. [internet]. 2020 Jun. 30 [cited 2026 Sep. 22];5(1):35-40. available from: https://ph01.tci-thaijo.org/index.php/RMUTLEngJ/article/view/241498