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System performance and performance enhancement relative to element position location errors for distributed linear antenna arrays.

机译：相对于分布式线性天线阵列的元件位置定位误差的系统性能和性能增强。

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摘要

For the most part, antenna phased arrays have traditionally been comprised of antenna elements that are very carefully and precisely placed in very periodic grid structures. Additionally, the relative positions of the elements to each other are typically mechanically fixed as best as possible. There is never an assumption the relative positions of the elements are a function of time or some random behavior. In fact, every array design is typically analyzed for necessary element position tolerances in order to meet necessary performance requirements such as directivity, beamwidth, sidelobe level, and beam scanning capability.;Consider an antenna array that is composed of several radiating elements, but the position of each of the elements is not rigidly, mechanically fixed like a traditional array. This is not to say that the element placement structure is ignored or irrelevant, but each element is not always in its relative, desired location. Relative element positioning would be analogous to a flock of birds in flight or a swarm of insects. They tend to maintain a near fixed position with the group, but not always. In the antenna array analog, it would be desirable to maintain a fixed formation, but due to other random processes, it is not always possible to maintain perfect formation. This type of antenna array is referred to as a distributed antenna array.;A distributed antenna array's inability to maintain perfect formation causes degradations in the antenna factor pattern of the array. Directivity, beamwidth, sidelobe level and beam pointing error are all adversely affected by element relative position error. This impact is studied as a function of element relative position error for linear antenna arrays. The study is performed over several nominal array element spacings, from lambda to lambda, several sidelobe levels (20 to 50 dB) and across multiple array illumination tapers.;Knowing the variation in performance, work is also performed to utilize a minimum variance array processing method to minimize the effects of the distributed array element mis-positioning. The extent of array factor performance enhancement is demonstrated for several linear distributed array designs where the input to the enhancement algorithm is only the element position information.
机译：在大多数情况下，天线相控阵传统上是由天线元件组成的，这些天线元件非常仔细且精确地放置在非常周期性的网格结构中。另外，元件之间的相对位置通常通常被尽可能地机械地固定。从来没有假设元素的相对位置是时间的函数或某种随机行为。实际上，通常会分析每种阵列设计的必要元件位置公差，以便满足必要的性能要求，例如方向性，波束宽度，旁瓣电平和波束扫描能力。;考虑一个由几个辐射元件组成的天线阵列，但是每个元素的位置都不像传统阵列那样刚性固定，机械固定。这并不是说元素放置结构被忽略或不相关，但是每个元素并不总是处于其相对的所需位置。相对元件的定位类似于飞行中的鸟群或昆虫群。他们倾向于在小组中保持接近固定的位置，但并非总是如此。在天线阵列模拟中，希望保持固定的构形，但是由于其他随机过程，并不总是可能保持完美的构形。这种类型的天线阵列称为分布式天线阵列。分布式天线阵列无法保持完美的形状会导致阵列的天线因子方向图退化。方向性，波束宽度，旁瓣电平和波束指向误差都受到元件相对位置误差的不利影响。研究了这种影响与线性天线阵列的元件相对位置误差的关系。该研究是在从λ到λ的几个标称阵列元素间距，几个旁瓣电平（20至50 dB）以及多个阵列照明锥度上进行的;了解性能的变化，还开展了工作以利用最小方差阵列处理这种方法可以最大程度地减少分布式阵列元素错位的影响。对于几种线性分布式阵列设计，展示了阵列因子性能增强的程度，其中增强算法的输入只是元素位置信息。

著录项

  • 作者

    Adrian, Andrew.;

  • 作者单位

    Michigan State University.;

  • 授予单位 Michigan State University.;
  • 学科 Electrical engineering.;Electromagnetics.
  • 学位 Ph.D.
  • 年度 2014
  • 页码 393 p.
  • 总页数 393
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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