Journal of Electronic Systems Adnan M. Affandi , Abdullah M Dobaie, Navin Kasim, Nawaf A. Al-Zahrani 5 1 2015 In this paper, the microstrip line fed rectangular patch antenna with inset has been designed and simulated by using ADS software in order to study the effects of various parameters on the antenna’s radiation characteristics. Also, twoby- two, four-by-four, eight-by-eight and sixteen-by-sixteen microstrip patch antenna arrays has been discussed. The effect on the antenna parameters due to increasing the antenna elements (array) is observed clearly on antenna gain, directivity. This type of antenna can be used for cellular phones application.