项目名称: 平板裂缝天线表面误差对其电性能的影响机理研究
项目编号: No.51305322
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 机械、仪表工业
项目作者: 李娜
作者单位: 西安电子科技大学
项目金额: 27万元
中文摘要: 平板裂缝天线具有结构紧凑、重量轻、高增益、低副瓣等优异的结构与电气性能,是目前机载火控雷达的首选天线形式。因其辐射单元与馈电网络为一体加工成型,可调性差,又长期工作在强振动、高温差环境,易发生变形,结构误差成为制约其性能提高的主要瓶颈。本项目以天线辐射波导和辐射阵面两类典型结构表面误差为研究对象,对表面误差的建模及影响机理问题进行基础科学研究,旨在为有效控制表面误差、提出新型表面设计方案提供理论指导与方法支持。具体内容:提出基于电性能的表面误差建模方法,分别建立两种结构表面误差数学模型;利用空间坐标转换技术推导辐射缝幅相误差,进而建立表面误差对天线远场方向图影响关系公式;通过建立表面轮廓参数优化模型,实现天线面向电性能的表面功能性设计。本项目的实施对实现天线整体优化设计、提高其性能指标、降低加工成本具有重要理论意义与工程价值,同时也将为其他电子装备结构因素影响机理问题的研究提供思路借鉴。
中文关键词: 平板裂缝天线;误差建模;面向电性能;影响机理;功能性设计
英文摘要: The planar slot antennas is the preferred antenna from used in the airborne fire control radar due to the excellent structure and electric performance, such as compact structure, light weight, high gain and low side-lobe. The structure of the planar slot antennas is easy to be deformed because of long-time working in the environment of strong vibration and high temperature difference. Therefore, the cavity surface error of the antennas becomes the main bottleneck to the performance improvement. This project will discuss the modeling of the surface error and the influence mechanism to the antenna performance of radiation waveguide and radiation array. It is aiming at providing the theoretical foundation and technical support to the effective control of the surface error and new design scheme. Unlike other array antennas, the planar slot antenna consists of radiating and feed structures, and these two are inseparably linked. The specific research contents are as following. The project takes radiation waveguide and radiation array as the research objects, discusses the modeling method of the surface errors and their influence mechanisms to the antenna performance, aiming at providing the theoretical foundation and technical support to the effective control of the surface error and new design scheme. The project is
英文关键词: Planar slot antenna;Error modeling;Electrical properties-oriented;Influence mechanism;Functional design