0.45THz次谐波混频器优化设计  

Optimization and design of a sub-harmonic 0.45 THz mixer

作　　者：蒋长宏[1,2] 张德海[1,2] 赵鑫[1,2] 

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]中国科学院空间科学与应用研究中心,北京100190

出　　处：《太赫兹科学与电子信息学报》2015年第4期540-543,共4页Journal of Terahertz Science and Electronic Information Technology

摘　　要：采用ACST公司准垂直结构混频二极管对0.45 THz次谐波混频器进行优化设计。提出一种电路拓扑结构,使得电路结构紧凑且易于匹配。在对二极管结构分析与建模的基础上,利用射频电路仿真软件ADS及电磁场仿真软件HFSS对混频器电路及结构进行整体优化设计,得到理想情况下单边带变频损耗最小值6 d B,三分贝带宽大于30 GHz,所需本振驱动功率3.8 m W。仿真结果表明,该电路拓扑结构适用于采用反向并联肖特基二极管对实现次谐波混频器设计。A sub-harmonic 0.45 THz mixer is optimized and designed with quasi-vertical Schottky mixer diodes of ACST. A circuit topology which is compact and easily to be matched is proposed. Based on the diode structure analysis and modeling, the mixer circuits and structure are optimized as a whole by using an RF circuits simulation software(ADS) and an electromagnetic field simulation software(HFSS). The simulation results reveal that minimum Single Side Band(SSB) conversion loss is about 6 d B with 3.8 m W of local oscillator power, and-3 d B bandwidth is more than 30 GHz. The circuit topology is suitable for the use of anti-parallel Schottky diodes to achieve sub-harmonic mixer designs.

关 键 词：太赫兹 混频器 优化设计 

分 类 号：TN773[电子电信—电路与系统]