Premathilake T, Jayasinghe J, Saraereh O, Esselle K, Khokle R. High Directivity Broadband Hexagonal Fractal Ring Antenna with Modified Ground. ECTI-EEC [Internet]. 2020 Feb. 28 [cited 2024 May 5];18(1):1-8. Available from: https://ph02.tci-thaijo.org/index.php/ECTI-EEC/article/view/239914