Tavakoli MJ, Mallahzadeh AR. Wideband Directional Coupler for Millimeter Wave Application based on Substrate Integrated Waveguide. Emerg Sci J [Internet]. 2018 May 8 [cited 2025 Jun. 6];2(2):93-9. Available from: http://www.ijournalse.org/index.php/ESJ/article/view/72