CAJ | 학술논문

为了改善溅散板馈源天线中开口辐射波导的终端匹配性能并得到对称方向图，提出了一种 Ku 波段介质锥加载喇叭式溅散板馈源天线结构。该结构将聚四氟乙烯材料(介电常数为2.56)的介质体悬空插入圆锥喇叭内部，使介质体与空气更好地匹配。CST数值仿真结果表明，在工作频段内馈源 VSWR达到1.11以下，方向图具有良好的对称性；同时，介质锥加载副反射面构成的一种新型的溅散板馈源作为代替传统卡塞格伦天线中的馈源和副反射面，省去了支撑副反射面的支杆，减小了遮挡，提高了天线效率，达到了60%以上，为工程设计提供很好的理论依据。
위료개선천산판궤원천선중개구복사파도적종단필배성능병득도대칭방향도，제출료일충 Ku 파단개질추가재나팔식천산판궤원천선결구。해결구장취사불을희재료(개전상수위2.56)적개질체현공삽입원추나팔내부，사개질체여공기경호지필배。CST수치방진결과표명，재공작빈단내궤원 VSWR체도1.11이하，방향도구유량호적대칭성；동시，개질추가재부반사면구성적일충신형적천산판궤원작위대체전통잡새격륜천선중적궤원화부반사면，성거료지탱부반사면적지간，감소료차당，제고료천선효솔，체도료60%이상，위공정설계제공흔호적이론의거。
A splashplate feed antenna structure with dielectric-cone loaded horn in Ku band is proposed,in which not only the terminal match property of open radiation waveguide in the splashplate feed antenna can be improved but also the symmetri-cal patterns can be obtained.In this structure dielectric made of Teflon(εr1 =2.56)is inserted without touch into the inside of the conical horn to make better match between the air and the dielectric.The CST simulation results show VSWR<1 .1 1 in the work band and the pattern is symmetrical.Replacing the feed and sub-reflector in conventional Cassegrain antenna with the novel splashplate feed antenna with dielectric-cone loaded sub-reflector has many advantages,such as omitting sup-port legs,reducing the shield,improving the efficiency up to 60%.It can provide correlative theory basis for engineering de-sign.