一种新型介质加载的矩形喇叭天线

传统的卫星地面通信系统多采用抛物面天线,但抛物面天线却存在体积大、灵活性差等缺点,而喇叭天线则可以较明显地克服上述不足,但其增益较小、损耗较大。文中设计了一种新型介质加载的矩形喇叭天线,该天线有两层结构:上层为辐射结构,下层为微带-槽耦合馈电结构。辐射结构是中心为矩形喇叭孔的长方体铜板。这种结构的喇叭天线体积适中、活动方便,而且天线增益、反射系数和半功率波瓣宽度相比于传统形式的喇叭天线都有明显改善。

Design of a Novel Dielectric Loaded Rectangular Horn Antenna

Traditional land satellite communication system mostly use parabolic antenna,which is bulky and inflexible.The horn antenna can overcome the shortcomings mentioned above,but with smaller gain and greater loss.This article designs a new type of dielectric loaded rectangular horn antenna which has a two-layer structure,the upper being radiation structure and the lower micro-strip slot coupled feed structure.The radiation structure is a rectangular copper whose center is a rectangular horn hole.This antenna is moderate in size,easy to activities,and has an obvious improvement over the traditional ones in the gain,the reflection coefficient and the half-power lobe width.