基于竞争最优准则的平面稀疏阵列优化方法

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中图分类号：TN821 文献标志码： A

Abstract： For the optimization of rectangular planar sparse array antenna with design constraint of the number of array elements，array aperture and lobe half-power beam width，an iterative FFT algorithm based on competitive optimality criterion is proposed. Array positions or empty grid positions are set as optimization variable，available array positions are set as alternative strategies and minimum peak sidelobe level（PSLL） is set as optimization goal in the case of fixed sparse rate，and this optimization problem can be regarded as competitive optimality problem.Meanwhile，a fast Fourier transform（FFT） is employed to speed up the calculation of pattern. The simulated results show that the PSLL and beam width performance have improved，particularly the PSLL in asymmetric optimization is reduced by 4～6 dB，meanwhile good convergence and stability can be achieved.

Key Words：array antenna; thinned array;optimal reaction criterion; fast Fourier transform; constraint optimization

0 引言

稀疏阵列天线是指从规则的一维或二维阵列中按一定比例抽去天线单元或接匹配负载[1]，由于其能够解决阵列天线设计复杂、制造成本高等难题，还能获得与满阵排布相当的窄波束，因而在实际工程中得到了广泛的应用。（剩余5105字）