Sekharbabu, B, K Narsimha Reddy, and S Sreenu. “Design and Development of a 3dB Quadrature Patch Hybrid Coupler”. International Journal of Engineering & Technology 7, no. 2.6 (March 11, 2018): 217–220. Accessed May 3, 2024. https://sciencepubco.com/index.php/ijet/article/view/10570.