A Method for Correlation Reduction of Dual-Polarized Base Station Antenna Array With Limited Angular Spread

A method of reducing the correlation of dual-polarized base station antenna array with limited angular spread is proposed. The antenna array comprises of four dual-polarized base station antennas operating in 6.425GHz-7.125GHz. Two layers of parasitic patches are placed above every antenna element to reduce the correlations. According to the actual situation, the azimuth angular spread of the array is set as 60° and the elevation angular spread is set as 20°. Most correlations between the antennas in the array decrease, which can be shown by the reduction of calculated envelope correlation coefficients(ECC). In addition, the radiation pattern of every antenna is improved effectively. The calculated and simulated results demonstrate the effectiveness of the proposed method.