A Fast and Efficient Beamforming Algorithm Imitating Plant Growth Gene for Phased Array Antenna

Figure 6

(a) The flat-topped beam pattern of the 1 × 16 antenna array under the condition of array spacing d = 0.5λ and gain G(θ) = 8 dBi at angle θ = 18°(b) the fine-tuned pattern has a gain of 5dBi at θ = 18°, which is 3 dB lower than the original flat-topped beam pattern; (c) the fine-tuned pattern has a gain of 11dBi at θ = 18°, which is 3 dB higher than the original flat-topped beam pattern. The random pattern of the 1 × 16 array antenna with array spacing d = 0.5λ was taken as the initial pattern, and the growth model was used to carry out continuous fine-tuning of the side lobe gain at θ = –33° with equal step size; (d) the general view of pattern tuning; (e) the detail view; (f) the cosecant squared pattern designed using the growth model, the coverage range of the formed pattern is -31°∼31°, and the maximum gain direction is θ = 17°.

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