Array beam forming method based on directional diagram reconstruction unit
A pattern reconstruction and pattern technology, applied in the field of electromagnetic waves, can solve the problem of lack of a good pattern optimization method, and achieve the effect of lowering the side lobe level and improving the gain.
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[0024] Taking the line array antenna as an example, the theoretical process of the planar array antenna can be deduced by analogy. Assuming that the antenna has N array elements with K different pattern patterns (uniform or non-uniform) with arbitrary distribution characteristics, then when the array antenna receives signals, the combined electric field strength of the array antenna can be described as:
[0025]
[0026] where w n 、a n (θ) and E n,k (θ) are respectively the complex weight coefficient of the nth array element factor, the array factor, and the far-field electric field intensity corresponding to the kth pattern pattern, and the azimuth angle θ∈[0°,180°].
[0027] Vectorize the above formula to get:
[0028] f(θ)=e a (θ)w (2)
[0029] Among them, the array weight coefficient vector composed of N array element weight coefficients e a (θ)=a(θ)⊙e N,K (θ), a(θ)=[a 1 (θ)...a n (θ)...a N (θ)] H , e a (θ) is the product of the array factor of N units a...
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