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首页> 外文学位 >An Aperture Synthesis Technique for Cylindrical Printed Lens / Transmitarray Antennas with Shaped Beams.
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An Aperture Synthesis Technique for Cylindrical Printed Lens / Transmitarray Antennas with Shaped Beams.

机译：圆柱印刷透镜/异形波束天线阵列的孔径合成技术。

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摘要

Printed lens antennas offer the possibility of realizing shaped beam patterns using no more complexity than is required for pencil beam patterns. Shaped beam patterns can be obtained by appropriately determining the complex transmission coefficient required for each cell (or element) of the printed lens, taking into account the varying feed field over the input surface of the lens. Certain ranges of transmission coefficient amplitude and phase are undesirable (eg. too low an amplitude implies a large reflection at the lens input surface). It would be preferable to constrain the range of values that the transmission coefficient can take as an integral part of the lens synthesis procedure, and thus the transmission coefficient itself needs to be the synthesis variable. In this thesis a synthesis technique for doing this is developed based on the method of generalized projections, modified to "operate" in the space of transmission coefficients. This makes it possible to immediately perceive what influence constraints on the actual transmission coefficients have on the possible radiation pattern performance. In addition, an approach that allows one to constrain the transmission coefficient to values that must be selected from an available database of transmission coefficients is incorporated into the synthesis technique.;Keywords: Printed lens, transmitarray, aperture synthesis, shaped beams.
机译：印刷透镜天线提供了使用不比铅笔波束图所需的复杂性更高的形状波束图的可能性。考虑到透镜输入表面上的不断变化的馈电场，可以通过适当确定印刷透镜的每个单元（或元件）所需的复数透射系数来获得成形的光束图案。透射系数振幅和相位的某些范围是不希望的（例如，振幅太低意味着在镜头输入表面会有大反射）。最好限制透射系数可以作为透镜合成过程不可分割的部分的值的范围，因此透射系数本身必须是合成变量。在这篇论文中，基于广义投影的方法开发了一种综合方法，将其修改为在透射系数空间内“工作”。这使得可以立即感知到对实际透射系数的约束对可能的辐射方向图性能有什么影响。此外，综合技术还采用了一种方法，该方法可以将透射系数限制为必须从可用的透射系数数据库中选择的值。关键词：印刷透镜，透射阵列，孔径合成，整形光束。

著录项

  • 作者

    Biswas, Mahmud.;

  • 作者单位

    University of Ottawa (Canada).;

  • 授予单位 University of Ottawa (Canada).;
  • 学科 Engineering Electronics and Electrical.
  • 学位 M.A.Sc.
  • 年度 2013
  • 页码 151 p.
  • 总页数 151
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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