Smart Antenna Design with Arbitrary Tilit for Wireless Communication

In this paper, a smart antenna with arbitrary down tilt is proposed for 3G wireless communication. In the third communication generation, the antenna downtilt is a common method used to adjust the interference conditions especially in urban scenarios with high base station density. The proposed antenna is able to tilt the antenna pattern in the desired direction as well as null in the interference directions. In the design procedure, the antenna element is designed and optimized to achieve the desired properties for 3G networks. Then a proper algorithm is used to minimize the noise variance in the antenna output. Finally, some simulations are performed to verify the proposed method. In these simulations, the antennas down tilts are considered as 0, 5 and 10 degrees with arbitrary interference directions. Moreover, some antenna with different numbers of interferences are designed and simulated. These results verify the ability and capability of the proposed method.