应用于焦平面成像前端的太赫兹准光检波器设计与实现.pdf

ANSYS 2011 中国用户大会优秀论文 应用于焦平面成像前端的太赫兹准光检波器设计与实现 牟进超，吕昕，徐明明，于伟华，陈玲 北京理工大学信息与电子学院，100081 [ 摘 要 ] 本文主要介绍了太赫兹准光检波器的设计与实现。太赫兹准光检波器主要由两部分组成：一部 分是集成平面天线的肖特基二极管芯片；另一部分是高阻硅介质透镜。其中，肖特基二极管的 截止频率为 1.5 THz。设计并优化了三种集成平面天线，包括对数周期天线、等角螺旋天线以 及对数周期偶极子天线。采用了扩展半球透镜以消除表面波并改善天线方向性，其 L/R 值为 0.195 。测试结果表明，所设计准光检波器可以实现 26 GHz-110 GHz 的空间信号接收与检波。 测试的方向图与仿真结果吻合较好。 [ 关键词 ] 太赫兹；准光检波器；集成平面天线二极管；高阻硅透镜 Design and Realization of Terahertz Quasi-optical Detectors for Focal Plane Imaging MOU Jin-Chao, LV Xin, XU Ming-Ming, YU Wei-Hua, Chen Ling School of Information and Electronics, Beijing Institute of Technology, 100081 [ Abstract ] This paper presents the design and realization of several terahertz quasi-optical detectors. The detector mainly consists of two parts: one is the planar antenna-integrated Schottky diode chip; the other is the high resistivity silicon lens. The cutoff frequency of the Schottky diode is 1.5 THz. Three types of antennas were designed and optimized, including the log-periodic antenna, equiangular spiral antenna and log-periodic dipole antenna. The extended hemispherical lens with the L/R of 0.195 was adopted to eliminate the surface waves and improve the radiation performance of the antennas. The measured results show the realized quasi-optical detector could detect the radiation ranging from 26 GHz-110 GHz 。 The measured radiation patterns agree well with the simulated ones. [ Keyword ] Terahertz; Quasi-optical Detector; Planar antenna-integrated Schottky Diode; High-resistivity Silicon Lens. 1