空间电子技术
空間電子技術
공간전자기술
SPACE ELECTRONIC TECHNOLOGY
2014年
4期
27-31
,共5页
短背射天线%高增益%宽带%扼流槽
短揹射天線%高增益%寬帶%扼流槽
단배사천선%고증익%관대%액류조
Short backfire antennas%High gain%Broad band%Choke
介绍了一种改进型的短背射天线，通过增加扼流槽的方式有效提高天线的增益，实现了高达80%的口径效率；同时通过优化副反的形状有效改善短背射天线驻波带宽，在约12%的带宽内具有19dBi的高增益特性和优于1.5的驻波带宽。实测结果有效验证了该设计的正确性和有效性，由该结构构成的短背射天线具有效率高、副瓣低、功率容量大的特点，可很好的满足星载应用。
介紹瞭一種改進型的短揹射天線，通過增加扼流槽的方式有效提高天線的增益，實現瞭高達80%的口徑效率；同時通過優化副反的形狀有效改善短揹射天線駐波帶寬，在約12%的帶寬內具有19dBi的高增益特性和優于1.5的駐波帶寬。實測結果有效驗證瞭該設計的正確性和有效性，由該結構構成的短揹射天線具有效率高、副瓣低、功率容量大的特點，可很好的滿足星載應用。
개소료일충개진형적단배사천선，통과증가액류조적방식유효제고천선적증익，실현료고체80%적구경효솔；동시통과우화부반적형상유효개선단배사천선주파대관，재약12%적대관내구유19dBi적고증익특성화우우1.5적주파대관。실측결과유효험증료해설계적정학성화유효성，유해결구구성적단배사천선구유효솔고、부판저、공솔용량대적특점，가흔호적만족성재응용。
A novel modification of short backfire antenna ( SBA) is described in the paper, which has the advantages of high aperture efficiency, high gain, low side-lobe, simple structure, easy method to feed and so on. The added structure of choke on reflector is applied to increase the gain and to improve side lobe of the radiation pattern. The shape of double cone on sub-reflector is given to improve the bandwidth and VSWR of ports. At last, a fabricated prototype according the de-signed dimensions achieved from simulation and analysis is discussed, and the actual measured results is consistent with the simulated results. The novel SBA has the good performance that the gain of 19dBi is attained, and VSWR is lower than 1. 5 at the relative bandwidth of 12%.
