Directivity Gain Improvement in Phase Array Antenna via a Novel L2-Norm Adaptive Beamforming Algorithm

The performance of phased array antenna radiation pattern can be enhanced either by employing the optimum logical weights to each segment of the array, or by optimizing the physical geometry of the array. Intensive works have been presented in the literature to optimize physical geometry of antenna array. However, because of complexities and high computational overheads; optimization of antenna weights (or adaptive beamforming) got relatively less attention. A severe issue of adaptive beamforming is the directivity gain. The paper proposes a new adaptive beamforming algorithm that is more effective in improving the directivity gain of phase array antenna in comparison with the existing adaptive beamformers. The algorithm shows further effectiveness when number of radiators is increased in the array. The comparative results are very promising.

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