为了缓解微波频段频谱资源的日益紧张, 对太赫兹频段进行探索, 介绍了一款基于 GaAs肖特基二极管的 330 GHz次谐波混频器。设计采用了整体综合设计的方法, 进行高频结构模拟器(HFSS)与先进设计系统 (ADS)联合仿真。优化过程中, 电路不连续性通过 HFSS仿真结果表征, 电路传输特性和二极管非线性特性由 ADS仿真结果表征, 通过优化传输线参数, 实现优化电路的目的。此方法增大了仿真优化空间, 降低了设计难度。仿真结果显示, 在 300~350 GHz频段内, 混频器的变频损耗小于 8 dB。

At present, the frequency spectrum resources in the microwave band are becoming increasingly scarce. The exploration of the terahertz band has provided new ideas for solving this problem. Terahertz technology is widely used in many fields, such as communications, radar and imaging. Terahertz mixer is a critical device in the terahertz transceiver system. Therefore, the study of terahertz mixer is very important. A 330 GHz sub-harmonic mixer based on GaAs planar Schottky diode is presented. An integrated design method is utilized. And a co-simulation in High Frequency Structure Simulator(HFSS) and Advanced Design System(ADS) is implemented. The circuit discontinuity is characterized by the simulation results of HFSS. The characteristics of the circuit transmission and the nonlinear characteristics of the diode are characterized by ADS simulation results. By optimizing the transmission line parameters, the purpose of optimizing the circuit is realized. This method increases the optimization range and reduces the design difficulty. Simulated results show that conversion loss of this mixer is less than 8 dB from 300 GHz to 350 GHz.