基于人工电磁结构的天线波束控制技术  

Antenna Beam Control Technology Based on Artificial Electromagnetic Structures

作　　者：徐琪皓 徐光辉 毛军发[1] XU Qi-hao;XU Guang-hui;MAO Jun-fa(School of Electronic Information and Electric Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《微波学报》2023年第2期6-10,共5页Journal of Microwaves

基　　金：国家重点研发计划(2020YFB1807300)。

摘　　要：波束前倾结构后置天线(Forward Tilted Beam and Back-placed Antenna,FTBBA)在高超声速小型飞行器领域有广泛应用。文中采用水平磁+电壁构成端射元,利用电与磁的二重性原理和Yagi天线理论,构建C波段波束前倾结构后置微带八木天线以实现端射。同时,利用栅格结构人工电磁材料(Artificial Electromagnetic Structures,AEMS)抑制表面波,减小杂散电磁波对端射方向图和极化纯度的影响。此外,围绕高超声速小型飞行器天线的共形需求,将两组FTBBA共形于典型的高超声速飞行器表面以实现双极化端射。该天线能够在5.2~5.9 GHz实现VSWR<2(相对带宽为12.6%),增益>11 dBi,主瓣波束宽度约20×32°。该天线突破端射波束控制技术,解决了常规技术手段难以克服的高速飞行器结构后置和波束前倾相互制约等技术难题。Forward tilted beam and back-placed antenna(FTBBA)has been widely used in the field of hypersonic aircraft.The end-fire element is formed by the horizontal magnetic plus electric wall,and the duality principle of electricity and magnetism and the Yagi antenna theory are used to construct the C-band FTBBA.At the same time,the artificial electromagnetic structure(AEMS)unit is used to suppress surface waves and reduce the influence of stray electromagnetic waves on the end-fire pattern and polarization purity.In addition,focusing on the conformal requirements of hypersonic aircraft antennas,we conform two sets of FTBBAs to the surface of a typical aircraft to achieve dual-polarization end-fire radiation.The antenna can achieve VSWR<2(relative bandwidth 12.6%)at 5.2-5.9 GHz,gain>11 dBi,and the main lobe beam bandwidth is about 20×32°.The antenna breaks through the end-fire beam control technology,and solves the technical problems of the mutual restriction within beam forward tilt and structure backward in missile-borne application,which are difficult to overcome by conventional technical means.

关 键 词：波束前倾结构后置( FTBBA) 人工电磁结构( AEMS) 共形 双极化 端射 

分 类 号：TN820[电子电信—信息与通信工程]