Abstract: The design and simulation of a coplanar capacitive fed mirostrip antenna suspended above the ground plane is presented. The proposed antenna is excited by a single probe feed. This antenna operates in two different bands C band having frequency range 4-8 GHz and X band having frequency range 8-12GHz .IE3Dsoftware is used for simulation. It is demonstrated that the proposed antenna can be used for wideband applications with impedance bandwidth of 53.74% at center frequency 7.015 GHz with good gain in microwave bands. Capacitive coupling is used to improve the results. Polyolefin is used as a dielectric material having dielectric constant 2.3.2.

Keywords: Microstrip antennas, Capacitive fed, Wideband, Absolute gain, Efficiency.