圆极化波导缝隙天线研究

发布时间：2018-04-16 15:12

本文选题：共口径 + 圆极化　；参考：《南京理工大学》2014年硕士论文

【摘要】：波导缝隙天线由于其自身所具有的高增益、高效率、结构紧凑等优点,广泛应用于雷达系统、地面接收基站、卫星通信等诸多领域。在天线的应用当中,极化方式尤为重要,本文主要针对波导缝隙天线如何实现圆极化设计进行了研究,研究内容主要包括： 1.详细阐述波导缝隙天线的设计原理的基础上,针对共口径双圆极化天线应用,提出了两种圆极化波导缝隙天线设计方案：波导缝隙加载波导圆极化器的圆极化脊波导缝隙天线和波导缝隙加载微带的圆极化波导缝隙天线。 2.对圆极化脊波导缝隙天线进行研究。这种天线在馈电波导宽边开纵缝的基础上,附加极化波导实现圆极化辐射单元,同时馈电波导与极化波导均采用脊波导以减小尺寸。对单元的辐射特性进行了深入分析,在此基础上设计了工作于10GHz的1×10圆极化波导缝隙阵列天线。中心频率上天线增益为17dB,副瓣电平为-25dB,3dB轴比带宽为3.3%。该天线具有良好的轴比带宽、易于实现幅度控制而且尺寸小,适合于实现高性能的双极化共口径天线。 3.提出波导缝隙加载微带的圆极化天线单元方案。在一般波导缝隙宽边上方附加微带贴片天线,缝隙从馈电波导耦合能量至上方的微带贴片,由设计灵活的微带贴片实现圆极化辐射。对圆极化单元进行了详细的参数仿真分析,验证了设计的合理性,并提出加载二元贴片的方案改进单元的辐射效率。该天线结合了波导缝隙天线高效率和微带贴片设计灵活、易加工等优点,具有良好前景。
[Abstract]:Waveguide slot antenna is widely used in radar system, ground receiving base station, satellite communication and so on because of its high gain, high efficiency and compact structure.In the application of antenna, polarization mode is very important. In this paper, the design of circular polarization of waveguide slot antenna is studied. The main contents are as follows:1.Based on the design principle of waveguide slot antenna, the application of common-aperture dual-circularly polarized antenna is discussed in detail.Two design schemes of circularly polarized waveguide slot antenna are presented: the circular polarized ridge waveguide slot antenna loaded with waveguide slot and the circular polarization waveguide slot antenna loaded with microstrip.2.The slot antenna of circular polarized ridge waveguide is studied.On the basis of the longitudinal slit of the wide edge of the feed waveguide, the circular polarized radiation unit is realized by adding the polarized waveguide, and the ridge waveguide is used to reduce the size of the feed waveguide and the polarized waveguide.Based on the analysis of the radiation characteristics of the element, a 1 脳 10 circularly polarized waveguide slot array antenna working in 10GHz is designed.At the center frequency, the antenna gain is 17 dB, and the sidelobe level is -25 dB ~ 3 dB.The antenna has good axial ratio bandwidth, easy to realize amplitude control and small size, which is suitable for high performance dual-polarization common aperture antenna.3.A circular polarization antenna element scheme with waveguide slot loaded microstrip is proposed.The microstrip patch antenna is added over the wide edge of the general waveguide slot. The gap coupling energy from the feed waveguide to the upper microstrip patch is applied to realize circular polarization radiation by the flexible microstrip patch.Detailed parameter simulation analysis of circular polarization cell is carried out, which verifies the rationality of the design, and proposes a scheme to improve the radiation efficiency of the cell by loading binary patch.The antenna combines the high efficiency of waveguide slot antenna and the advantages of flexible design and easy processing of microstrip patch, so it has a good prospect.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN823.24

【参考文献】