Abdul Hassain, Z. A., A. R. Azeez, M. M. Ali, and T. A. Elwi. “A Modified Compact Bi-Directional UWB Taperd Slot Antenna With Double Band-Notch Characteristics”. Advanced Electromagnetics, vol. 8, no. 4, Sept. 2019, pp. 74-79, doi:10.7716/aem.v8i4.1130.