Hosseini, Sayed M., and Abbas Rezaei. “Design of a Branch-Line Microstrip Coupler Using Spirals and Step Impedance Cells for WiMAX Applications”. ARO-THE SCIENTIFIC JOURNAL OF KOYA UNIVERSITY 8, no. 1 (February 20, 2020): 1-4. Accessed December 23, 2024. http://aro.koyauniversity.org/index.php/aro/article/view/ARO.10606.