Volume 39, Number 5, October 2021
|1029 - 1034
|14 December 2021
An efficient AIM for the scattering computation of the finite sparse array
School of Electronic Information, Northwestern Polytechnical University, Xi’an 710072, China
Based on the traditional adaptive integral method(AIM), a fast method called array AIM is proposed to accelerate the scattering calculation of the finite periodic array and the sparse array. On one hand, this method could eliminate the idle grids through the utilization of 5-level block-Toeplitz matrix. Furthermore, the procedure of near correction is eliminated by applying the zeros shielding technique. On the other hand, the block Jacobi preconditioning technique is used to improve the iterative convergence, and the technique of wave path difference compensation is applied to accelerate the post-processing. The numerical results show that the proposed method not only possesses good accuracy, but also has much less cost both in time and memory, in comparison with the traditional AIM. Moreover, this method could be applied to solve the scattering problems for the finite periodic array, as well as the sparse array.
Key words: adaptive integral method / finite periodic array / sparse array / multilevel block-Toeplitz matrix
关键字 : 自适应积分法 / 有限周期阵列 / 稀疏阵列 / 多层托普利兹矩阵
© 2021 Journal of Northwestern Polytechnical University. All rights reserved.
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