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Abstract

In this work the circular microstrip antenna arrays has been designed for X-band application by using the HFSS simulator. Arlon AD320A (tm) material with dielectric constant 3.2 and height of a substrate material is 1.7mm. The coaxial feed has been used for feeding the circular patch antenna. The design of microstrip antenna array configurations was 1x2 at 9.18 GHz were presented. The simulation results show improvements in average gain (7.6 dB) while in the single antenna (6.6 dB), band width of antenna array is not change about the band width of single antenna (18%) and show reduction of mutual coupling with increasing the separation between two elements (d) in antenna array.