Saravanakumar, Murugeshwari, Arvind Kumar, and Singaravelu Raghawan. “Substrate Integrated Waveguide Fed Wideband Circularly Polarised Antenna With Parasitic Patches”. Defence Science Journal 69, no. 1 (January 10, 2019): 87-92. Accessed April 10, 2020. https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/13049.