【作者】 柯林；

【导师】 付永庆；

【作者基本信息】 哈尔滨工程大学 ， 电磁场与微波技术， 2007， 硕士

【摘要】 微带天线具有许多优点，如体积小、重量轻、易共形且易于批量生产，在很多领域得到了广泛的应用，如：个人通信、射频标签识别、导弹、雷达等等。但是微带天线也有致命缺点频带窄，因此限制了它的应用。本文从微带矩形贴片天线基本原理出发，对微带矩形天线的辐射性能、阻抗特性进行了分析，设计了一个工作在Ku波段微带单元天线。它采用一种由三层多贴片组成的宽频带微带天线，利用微带线进行馈电，放4个圆形贴片在中间层作为补偿电容，由贴片之间的谐振耦合使该天线的频带展宽。用Ansoft公司的HFSS v10软件进行仿真，从仿真的结果中得到带宽为26.9％（VSWR≤2），可在从13.9GHz～18.22GHz的Ku波段内工作。在此单元天线的基础上，组建一个16×16微带天线阵，阵元间距约为0.7λ₀，等幅同相馈电。得到仿真结果半功率主瓣宽度约为5⁰～6⁰在E、H面，平均增益为25dB，最好的副瓣为-15dB，最差的副瓣为-10dB。更多还原

【Abstract】 Microstrip antenna has a lot of merits such as small volume, light in weight, consistent with carrier easily, easy for batch production, so it has been widely used in different fields, just as personal communication, RFID, missile, radar and so on. But the microstrip antenna also has the fatal disadvantage of narrow band, so its application has been limited.By analyzing the radiation characteristic and the impedance characteristic of the microstrip rectangle antenna according to the basic theory of the slice antenna, a microstrip antenna unit, which can work in the range of Ku band, was designed in this thesis. The unit was composed of three layers and two square patches. It was feed with microstrip and four circular patches were used as the compensatory capacitances in the middle layer. Because of the coupling resonance between the pieces, the bandwidth of the microstrip antenna was extended. This microstrip antenna was simulated with the software HFSS v10 of Ansoft company .The band is extended to 26.9% （VSWR<2） from the results, it can work very well within Ku band from 13.9GHz to 19.22GHz.A microstip antenna array（16×16） is made basic the unit of microstrip antenna, the distance between the unit is about 0.7λ₀, the microstrip antenna array is feded with the same amplitude and phase. We know from the simulated results , the half-power beamwidth is about 5⁰～6⁰ in E and H plane, the average gain is about 25dB, the best sidelobe is -15dB and the worst is about - 10dB.更多还原