N V Koteswara Rao, P Chandra Sekhar, U. R. B. . “A Dual- Band Microstrip Array Antenna With Defected Ground Structure”. International Journal on Recent and Innovation Trends in Computing and Communication, vol. 11, no. 9s, Aug. 2023, pp. 809-17, doi:10.17762/ijritcc.v11i9s.9488.