Effects of the Loss Tangent, Dielectric Substrate Permittivity and Thickness on the Performanceof Circular Microstrip Antennas. J. eng. sustain. dev. [Internet]. 2006 Mar. 1 [cited 2024 Jul. 3];10(1):1-13. Available from: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1757