小型微带天线的共形研究

发布时间：2018-03-20 17:02

本文选题：共形天线　切入点：微带天线　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：共形天线因为是附着在载体的表面,可以节省空间,并且不影响载体的表面结构。当天线载体的运动速度很高时,天线并不会对载体的空气动力形成阻力。鉴于这些优点,共形天线可以广泛的应用在飞机、火箭、导弹、卫星等各种飞行器上。因此共形天线逐渐成为了当前天线领域研究的热点。本文在现有研究成果的基础上做了大量工作,提出了一种圆柱共形八木天线和一种圆柱共形对数周期天线,对今后圆柱共形天线的研究提供了参考。本论文的包含以下主要内容:第一,对共形天线的研究意义和共形天线的研究现状进行了介绍,阐述了微带共形天线的基础理论和研究设计方法。第二,仿真优化了一款微带八木天线。通过在八木天线的反射器上开槽,可以使天线的结构更加紧凑,缩小了天线的体积,而且能够减小天线方向图的旁瓣和增加天线回波损耗的带宽;将八木天线做成圆柱共形天线,对其进行了仿真优化,可以看出圆柱共形天线仍然有较好的辐射特性,该天线的工作频率在30GHz以上,能够应用于毫米波的设备;最后将天线进行加工和测试,从测试结果可以证明圆柱共形八木天线拥有良好的综合性能。第三,仿真优化了一款微带对数周期天线。通过使用单层介质板来替代普通对数周期天线的双层介质板,可以减小天线的厚度,便于天线的共形;通过仿真优化,单层介质板所需要的辐射贴片数量减少很多以后,仍然具有很好的辐射特性,从而能够使天线的尺寸大大的减小;将对数周期天线做成圆柱共形天线,对圆柱共形对数周期天线进行了仿真优化,可以看到天线仍然具有较好的特性,天线的工作频率在2GHz到7GHz之间,有较宽的带宽,能够应用在许多宽带的设备;最后将天线进行加工和测试,从测试结果可以证明共形对数周期天线拥有良好的性能。最后,对全文进行了总结,并给出了今后研究的方向。
[Abstract]:Conformal antennas, because they are attached to the surface of the carrier, save space and do not affect the surface structure of the carrier. When the velocity of the antenna carrier is very high, the antenna does not create resistance to the aerodynamics of the carrier. Conformal antennas can be widely used in aircraft, rockets, missiles, satellites and other aircraft. Therefore, conformal antennas have gradually become the focus of research in the field of antenna. In this paper, a lot of work has been done on the basis of existing research results. A cylindrical conformal octagonal antenna and a cylindrical conformal logarithmic periodic antenna are proposed, which provide a reference for the future research of cylindrical conformal antenna. The main contents of this thesis are as follows: first, The research significance of conformal antenna and the research status of conformal antenna are introduced. The basic theory and design method of microstrip conformal antenna are expounded. A microstrip Yagi antenna is simulated and optimized. By slotting the reflector of the antenna, the structure of the antenna can be more compact and the size of the antenna can be reduced. Moreover, it can reduce the sidelobe of antenna pattern and increase the bandwidth of antenna echo loss, and make Yagi antenna into cylindrical conformal antenna, and optimize it by simulation, it can be seen that cylindrical conformal antenna still has better radiation characteristics. The antenna can be used in millimeter-wave equipment because its working frequency is above 30GHz. Finally, the antenna is processed and tested, and the test results show that the cylindrical conformal Yagi antenna has good comprehensive performance. A microstrip logarithmic periodic antenna is simulated and optimized. By replacing the ordinary logarithmic periodic antenna with a single-layer dielectric plate, the thickness of the antenna can be reduced and the conformal antenna can be easily formed. The number of radiation patches required for a single-layer dielectric plate is much reduced, but it still has good radiation characteristics, which can greatly reduce the size of the antenna; the logarithmic periodic antenna is made into a cylindrical conformal antenna. The simulation optimization of cylindrical conformal logarithmic periodic antenna shows that the antenna still has good characteristics, the frequency of antenna is between 2GHz and 7GHz, and the antenna has a wide bandwidth, which can be used in many broadband devices. Finally, the antenna is machined and tested, and the test results show that the conformal logarithmic periodic antenna has good performance. Finally, the paper summarizes the whole paper and gives the research direction in the future.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN822

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