Systematic study of fields due to extended apertures by Gaussian beam discretization
Systematic study of fields due to extended apertures by Gaussian beam discretization
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DOI：
10.1109/8.29383
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发表时间：
1989-07
影响因子：
5.7
通讯作者：
J. Maciel;L. Felsen
中科院分区：
文献类型：
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作者：
J. Maciel;L. Felsen
在场的表示中，使用高斯光束作为基元。为了深入了解光束参数的选择对最终表示的影响，对一维线性相移余弦孔径分布的简单测试案例进行了系统的研究。通过连续添加具有大、窄或匹配腰围的单个移位和/或倾斜的光束，可以评估晶格不同部分中的元素如何对孔径、近区和远区中的实际场的建立做出贡献。增加足够的波束总是保证精确的解，这在这里通过独立的比较得到了验证。不同的波束选择意味着对辐射过程的不同建模。由此获得的理解有助于在后续应用中选择波束参数，在这些应用中，需要平衡良好的收敛、计算的简易性和跟踪波束通过像雷达罩这样的扰动环境的能力的要求。有迹象表明，窄波束提供了最健壮和最通用的公式来处理这些普遍情况。>；
Gaussian beams are used as basis elements in field representations. To gain insight into how the choice of beam parameters affects the final representation, a systematic study for the simple test case of a one-dimensional linearly phased cosine-aperture distribution has been undertaken. By successively adding individual displaced and/or tilted beams with large, narrow, or matched waists, one can assess how the elements in various portions of the lattice contribute to the build-up of the actual field in the aperture, near zone, and far zone. Adding enough beams always guarantees homing in on the exact solution, as is verified here by independent comparison. Different beam choices imply different modeling of the radiation process. The understanding gained thereby is helpful for selecting beam parameters in subsequent applications where it is necessary to balance requirements of good convergence, ease of computation, and ability to track the beams through perturbing environments like a radome. Indications are that the narrow beams provide the most robust and versatile formulation to deal with these generalized conditions. >