宽角扫描阵列天线的稀布优化布阵研究

发布时间：2018-05-29 05:28

本文选题：稀布天线阵列 + 矩阵束方法　；参考：《南京理工大学》2017年硕士论文

【摘要】：稀布阵列是一种新型天线阵列布阵方式。稀布阵列可以使阵元数目减少,阵元个数的减少不仅可以降低成本;而且阵元间距的增大可以使阵元间的互耦效应减弱。由阵列方向图可知,同时对阵元位置、激励和相位进行综合是十分复杂的。本文讨论的阵列优化技术主要是指在给定期望方向图函数的前提下,对阵列的阵元位置、激励和相位进行综合优化,使其用尽可能少的单元去拟合方向图函数。本文运用矩阵束方法和增广矩阵束方法对稀布天线阵列进行了优化设计,主要的工作和创新之处为:介绍了矩阵束方法和增广矩阵束方法的基本原理,详细分析了其适用于信号处理时需满足的信号模型,并给出了其用于阵列天线综合时需满足的阵列模型。运用矩阵束方法对直线阵列进行稀布优化,此方法对于均匀间隔的直线阵列有着非常良好的优化效果。对一般的赋形波束方向图,运用矩阵束方法将无法达到理想的效果,在矩阵束方法的基础上,研究分析了一种新的方法—前后向矩阵束方法,此方法利用特殊的矩阵结构来约束极值点分布,可精确重构期望的赋形波束方向图,并推广到多波束的问题。运用增广矩阵束方法综合平面天线阵列,可以保证方向图的任一切面都具有最佳特性。此方法的关键技术包括由采样点数据构造增广矩阵和对求得的极值点进行配对。对一般的赋形波束方向图,将增广矩阵束方法和前后向思想相结合,研究分析了一种新的方法—前后向增广矩阵束方法,通过算例证明了该方法的快速性和有效性,后期将其推广到多波束的问题。
[Abstract]:Thin array is a new type of antenna array. The thinning array can reduce the number of elements, which not only reduces the cost, but also weakens the mutual coupling effect between the elements with the increase of the distance between the elements. From the array pattern, it is very complicated to synthesize the position, excitation and phase of the elements simultaneously. The array optimization technique discussed in this paper mainly refers to synthetically optimizing the position, excitation and phase of array elements on the premise of a given desired direction graph function, so that the array can fit the direction graph function with as few elements as possible. In this paper, the method of matrix beam and the method of augmented matrix beam are used to optimize the design of thinning antenna array. The main work and innovation are as follows: the basic principles of matrix beam method and augmented matrix beam method are introduced. The signal model which is suitable for signal processing is analyzed in detail, and the array model for array antenna synthesis is given. The linear array is optimized by matrix beam method, which has a good effect on the linear array with uniform spacing. On the basis of the matrix beam method, a new method, the forward and backward matrix beam method, is studied and analyzed for the general pattern of shaped beam pattern, which can not achieve the ideal effect by using the matrix beam method. This method uses special matrix structure to constrain the distribution of extremum points, and can reconstruct the desired pattern of shaped beam accurately, and it can be extended to the problem of multi-beam. By using the augmented matrix beam method to synthesize the planar antenna array, the optimal properties of any tangent plane of the pattern can be guaranteed. The key techniques of this method include constructing the augmented matrix from the sample data and pairing the obtained extremum. In this paper, a new method, the backward and backward augmented matrix beam method, is studied and analyzed by combining the augmented matrix beam method with the forward and backward thought for the general shape beam pattern. An example is given to prove the rapidity and effectiveness of the method. It is extended to the problem of multi-beam in later stage.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN820

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