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高动态圆柱共形微带阵列北斗天线设计

发布时间:2018-07-10 08:34

  本文选题:北斗 + 高动态 ; 参考:《中北大学》2017年硕士论文


【摘要】:北斗卫星导航定位是我国自主开发的一项全球定位系统技术,在国家信息产业领域占有重要地位。天线是导航系统用来接收北斗信号重要的部分,近年来微带天线以其低剖面、易与载体共形等优点而被广泛使用。然而北斗天线设计的可共形性及其阵列单元设计的小型化问题仍是人们关注的重点,为此本文主要开展基于北斗的高动态圆柱共形微带天线以及共形阵列天线的设计。首先开展了微带天线基本理论的研究工作,根据微带天线的辐射原理、馈电方式以及阻抗匹配相关的原理,分析了一般共形微带天线的研究方法,提出了用腔模理论分析圆柱共形微带天线阵的方案。其次根据平面微带天线小型化的设计方案,进行了对微带馈线支节弯折解决天线阻抗匹配的设计,优化了平面微带天线的性能。仿真和加工实物测试表明,设计的平面微带天线在北斗B1频段电压驻波比小于2,圆极化性能良好,轴比小于3dB,在阻抗匹配良好的情况下,实现了天线的小型化设计,为共形微带天线的研究和应用提供理论及仿真依据。基于将单支节调配器用于曲面的思想,进行了北斗圆柱共形微带天线的设计,进行了二单元北斗圆柱共形阵列天线的HFSS仿真,研制了北斗天线实物,测试结果表明,该天线具有良好的阻抗带宽,VSWR2,增益为7.25dB,圆极化性能良好,基本满足高动态条件下北斗天线工程使用要求。
[Abstract]:Beidou satellite navigation and positioning is a global positioning system technology developed by our country. It occupies an important position in the field of national information industry. The antenna is an important part of the navigation system used to receive Beidou signal. In recent years, microstrip antenna is widely used for its low profile and easy to conform with the carrier. However, the design of the Beidou antenna can be used. The problem of conformal and array element design miniaturization is still the focus of attention. This paper mainly carries out the design of high dynamic cylindrical conformal microstrip antenna and conformal array antenna based on the Beidou. Firstly, the research work of the basic theory of microstrip antenna is carried out, according to the radiation principle of the microstrip antenna, the feeding mode and the impedance. According to the principle of matching, the research method of common conformal microstrip antenna is analyzed. A scheme of analyzing cylindrical conformal microstrip antenna array with cavity mode theory is proposed. Secondly, according to the design scheme of the miniaturization of the planar microstrip antenna, the design of the impedance matching of the microstrip feeder is carried out and the performance of the planar microstrip antenna is optimized. The simulation and processing results show that the designed planar microstrip antenna is less than 2 in the B1 band of Beidou, with good circular polarization performance and less than 3dB in axis ratio. Under the condition of good impedance matching, the miniaturization design of the antenna is realized, which provides theoretical and simulation basis for the research and Application of conformal microstrip antenna. A Beidou cylindrical conformal microstrip antenna is designed for the idea of curved surface. The HFSS simulation of a conformal array antenna with two units of the Beidou cylinder is carried out. The dipper antenna is developed. The test results show that the antenna has good impedance bandwidth, VSWR2, gain 7.25dB, good circular polarization performance and basically meet the high dynamic conditions north. The use of bucket antenna engineering.
【学位授予单位】:中北大学
【学位级别】:硕士
【学位授予年份】:2017
【分类号】:TN965.2

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