N. Mohd Zain, M. Zairil Muhammad Nor, M. Tarmizi Ali, N. Nur Darina Ahmad, M. Mohd Hussain, and A. Faiz Zainal Abidin, “The Effect of U-Slot Designs on The Performances of Microstrip Patch Antenna”, IJET, vol. 7, no. 4.22, pp. 106–110, Nov. 2018, doi: 10.14419/ijet.v7i4.22.27860.