三波段双极化共用口径SAR天线阵的研究

项目名称： 三波段双极化共用口径SAR天线阵的研究

项目编号： No.60871030

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 轻工业、手工业

项目作者： 钟顺时

作者单位： 上海大学

项目金额： 30万元

中文摘要： 合成口径雷达（SAR）对大地测绘、重大灾情估计和资源勘探等领域具有重大意义，在军事上更具有独到的优势，而SAR天线是决定其微波成像系统性能最关键的部件之一。本研究的创新点是发展一种采用创新的组阵方法来实现共用口径三波段双极化SAR微带天线阵，并采用先进的馈电设计来提高天线的带宽、端口隔离度和交叉极化特性。本课题组已在国际上率先制成了共用口径L/S/X三波段双极化微带天线阵实验天线。该 L/S/X 三波段天线样阵（L 波段：2×元；S波段：8×元；X 波段：16×元）在以 L 波段口径大小作为 SAR 天线阵总的口径尺寸的前提下，在三个波段上同时实现了双线极化；经实测，三个波段VSWR≤的百分比带宽相近，为13.7%至16.7%；三个波段的带内极化隔离度均优于37dB。至今共申请了8项中国发明专利；已发表期刊论文8篇，会议论文10篇；其中收入ＳＣＩ，ＥＩ和ＩＳＴＰ共11篇；编著1本和国际微带天线合著1章；同时培养了博士3人，硕士3人。上述具有国际先进性的研究成果，为提高我国微波天线阵研制水平和满足我国微波遥感技术发展的需求作出了应有的贡献。

中文关键词： 微波天线阵；三波段；双极化；共口径；SAR（合成口径雷达）

英文摘要： The SAR (Synthetic Aperture Radar) plays an important role in applications such as ground-mapping,appraisal of the damage caused by serious disasters , survey of natural resources and so on,especially for military affairs. The SAR antenna is one of the key devices determining the performance of the microwave remote sensing system. In this study, the main creative researches are to develop a novel synthetic approach to realize a TBDP (Tri-Band Dual-Polarization) shared-aperture SAR microstrip array ,and to enhance the antenna bandwidth,port isolation and the cross-polarization characteristic by means of the advanced feed design. An L/S/X TBDP shared-aperture prototype array has been fabricated and measured firstly in the world. This L/S/X TBDP prototype array (L-band:2×elments;S-band:8×elements;X-band:16×elements) realizes dual linear polarizations simultaneously in three bands provided that the whole size of the SAR array is as same as that of the L-band aperture. By means of measuremants,the VSWR≤ bandwidths of 13.4% to 16.8% are achieved for tri-bands,and the array port isolation of better than 37dB is observed in all bands.To now, 8 China Invention Patents have been applied ；8 journal papers and 10 conference articles have been issured; the number of the paper indexed by SCI,EI and ISTP are 11; a textbook and one chapter in an international book were published as well. During the process,3 doctors and 3 masters were nursed. Above-mentioned research results of international advanced level made some contribution to enhance the national devalop level of the microstrip antenna and to meet the demands of the microwave sensing technology developing in our country .

英文关键词： microstrip array; tri-bands; dual-polarization; shared-aperture; SAR(Synthetic Aperture Radar)