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首页> 外文学位 >An Archimedean spiral antenna with dielectric loading providing directional radiation patterns using a novel shape 3D printed ground structure.
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An Archimedean spiral antenna with dielectric loading providing directional radiation patterns using a novel shape 3D printed ground structure.

机译：具有介电负载的阿基米德螺旋天线使用新颖的3D打印形状地面结构提供定向辐射图。

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摘要

A spiral antenna is a radiation element that radiates a circularly polarized wave over a wide frequency bandwidth. It is commonly used in receiving application, where wideband antennas and circular polarization are needed, such as onboard a military platform. To avoid environmental hazards that may deteriorate an externally mounted antenna, this investigation evaluates the design and performance of an Archimedean spiral antenna intended for seamless integration into the armor of an existing platform. The effect of loading different materials on top of the radiating surface of the antenna and the effect of applying different conducting ground structures of various geometric configurations to the back of the antenna are modeled, determining the optimum performance for use in this application. The superstrate loading is necessary to protect the structure of the antenna and also to achieve miniaturization of the spiral antenna. Lack of a ground plane with a spiral antenna necessitates the use of a conducting grounding structure to minimize the back lobe and increase the gain of the spiral antenna on the main lobe. This study identifies an antenna design, superstrate material, and a 3D ground structure combination acceptable for potential military application.;The significance of light weight design for communication has increased tremendously, and hence weight reduction of antennas is a major consideration for seamless integration to existing systems. A novel 3D printed ground structure is designed to enhance the Right-Hand Circular Polarization (RHCP) gains and minimize the undesired radiation in the lower hemisphere of the spiral antenna without the loss of the antenna's broadband characteristics. Due to the high resolution and accuracy of the 3D printer, the printed design is able to achieve 90% weight reduction in comparison to the traditional Computerized Numerical Control (CNC) machining method.;The design and prototyping of a spiral antenna that can seamlessly integrate with current military platforms and Defense communication systems conducted under this research is a success. Based on simulated and measured results, the protective dielectric material loaded spiral antenna, backed by a conducting ground structure, is verified and validated as a capable antenna for use with this unique application.
机译：螺旋天线是一种辐射元件，它在很宽的频率带宽上辐射圆极化波。它通常用于需要宽带天线和圆极化的接收应用中，例如军用平台。为了避免可能损坏外接天线的环境危害，本次研究评估了旨在无缝集成到现有平台装甲中的阿基米德螺旋天线的设计和性能。对在天线辐射表面上加载不同材料的效果以及在天线背面应用各种几何构型的不同导电接地结构的效果进行了建模，从而确定了用于此应用的最佳性能。上层负载对于保护天线的结构以及实现螺旋天线的小型化是必需的。缺少带有螺旋天线的接地平面，必须使用导电接地结构，以最小化后瓣并增加主瓣上螺旋天线的增益。这项研究确定了潜在的军事应用可接受的天线设计，表面材料和3D地面结构组合;轻巧设计在通信中的重要性已经大大提高，因此减轻天线重量是与现有产品无缝集成的主要考虑因素系统。设计了一种新颖的3D打印地面结构，以增强右旋圆极化（RHCP）增益，并在不损失天线宽带特性的情况下，将螺旋天线下半球中的不良辐射降至最低。由于3D打印机的高分辨率和准确性，与传统的计算机数控（CNC）加工方法相比，打印的设计能够实现90％的重量减轻;;螺旋天线的设计和原型可以无缝集成与当前军事平台和国防通信系统一起进行的这项研究是成功的。根据模拟和测量结果，以导电接地结构为后盾的装有保护性介电材料的螺旋天线经过验证和验证，可作为可用于这种独特应用的天线。

著录项

  • 作者

    Tran, Phu N.;

  • 作者单位

    San Diego State University.;

  • 授予单位 San Diego State University.;
  • 学科 Electrical engineering.
  • 学位 M.S.
  • 年度 2016
  • 页码 154 p.
  • 总页数 154
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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