摘要
研究了微带天线小型化和方向图修正方法,设计了一种新型加载寄生耦合结构的微带天线。首先,采用空气介质的微带天线能有效降低损耗,同时采用天线末端接地的方法减小天线尺寸;其次,利用蘑菇型探针耦合馈电结构增加天线带宽;此外,在天线辐射端的周围加载均匀放置的寄生金属柱,进一步缩小天线尺寸以及校正天线辐射方向图。仿真结果表明,天线尺寸为Φ160mm×100mm,中心频点为475MHz,相对带宽可达32.9%,频带内天线方向系数大于0d Bi的波束宽度可达120°以上。
The method of band broadening and pattern correction for a microstrip antenna is studied. A novel oqicrostrip antenna with parasitic coupling structure is designed. First of all, using air as supporting substrate of microstrip antenna can effectively reduce the loss, while connecting the antenna terminal to the ground to reduce the antenna size. Second, the structure of mushroom-type probe coupling feed can increase the antenna bandwidth. In addition, the parasitic metal pins are placed around the antenna radiation side to further decrease the size of the antenna and correct the antenna radiation pattern. The simulation results show that the antenna size is Φ 160mm × 100mm, the center frequency is about 475MHz and the relative bandwidth is up to 32.9%. The beam width of antenna with antenna orientation coefficient greater than 0dBi in the frequency band can reach more than 120°.
作者
向国菊
XIANG Guo-ju(Southwest China Institute of Electronic Technology, Chengdu 610036, China)
出处
《中国新通信》
2018年第9期9-12,共4页
China New Telecommunications
关键词
寄生加载
宽带小口径
耦合馈电
微带天线
parasitic coupled
broadband small diameter
coupling feed
microstrip antenna
