200 GHz介质棒天线设计  

Design of the 220 GHz dielectric rod antenna

作　　者：张德海[1,2] 刘喆 ZHANG Dehai;LIU Zhe(Key Laboratory of Microwave Remote Sensing, Chinese Academy of Sciences, Beijing 100190,China;National Space Science Center, Chinese Academy of Sciences, Beijing 100190,China;University of Chinese Academy of Sciences, Beijing 100049,China)

机构地区：[1]中国科学院微波遥感技术重点实验室,北京100190 [2]中国科学院国家空间科学中心,北京100190 [3]中国科学院大学,北京100049

出　　处：《测绘工程》2019年第4期34-37,共4页Engineering of Surveying and Mapping

摘　　要：介质棒天线由于其高增益、小型化、主瓣宽度窄的特点使其在mm波频段广泛应用。将介质棒天线的使用频率提高到太赫兹频段,可以提高太赫兹频段透镜天线及反射面天线的辐射效率。用来做天线阵列时,相邻天线间互耦可以被大幅减小。文中设计一款太赫兹介质棒天线,分析计算太赫兹介质棒天线的传输模式,利用阻抗匹配的方法设计匹配过渡段,该介质棒天线具有宽带性质,中心频率200 GHz处增益为13.88 dB,其副瓣电平低于-20 dB,中心频率200GHz,在180~220GHz频率范围内电压驻波比均为1.2以下,达到设计要求。The dielectric rod antenna is widely used in millimeter band for its high gain, miniaturization and narrow main lobe. The operating frequency can be increased to terahertz band in order to enhance the radiation efficiency of the lens antenna and reflector. Mutual coupling can be largely reduced by adopting the dielectric antenna. This paper designs a dielectric antenna in terahertz band. In the design process, it analyzes the wave modes of the antenna and adopts the impedance matching method to design the transition section. Chebyshev transformer can decrease the VSWR and increase the bandwidth of the antenna. The antenna is an ultra-wideband antenna. The gain of the antenna can be reached to about 14 dB at the center frequency of 200 GHz. The sidelobe level can be less than-20 dB. The design requirement that VSWR is less than 1.2 in the frequency of 180~220 GHz can be satisfied.

关 键 词：介质棒天线 互耦 阻抗匹配 增益 电压驻波比 

分 类 号：TN926.4[电子电信—通信与信息系统]