Abstract
This paper uses Ansoft High Frequency Structure Simulator software to designed new structures of a circular microstrip antenna operating in X-band microwave frequency. The new proposed antenna was designed by making an etch slots on the patch of this antenna to enhance bandwidth and gain. This antenna design consists of slots with an annular ring and square shapes in different sizes. The annular ring slot is inside the circular patch and the other four square slots are etched on patch edge. Several parameters like input impedance, radiation patterns, return loss and gain were studying in this work. The results of gain and bandwidth of simulated reflection coefficients at -10 dB were 8.10 dB and 1.129 GHz, with resonant frequency 10.06 GHz. Therefore, the new antenna satisfies the request of the application in system of modern wireless communication.
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