基于平面肖特基二极管的440GHz次谐波混频器研究

Design of a 440GHz Sub-harmonic Mixer Based on Planar Schottky Diode

本文介绍了一种基于平面肖特基势垒二极管的440GHz次谐波混频器,采用三维建模提取寄生参数的仿真方法,电路为石英基片悬置微带形式,反向并联二极管对倒置黏贴在基片上。电路中的无源结构以及二极管的线性寄生参数部分利用三维建模并进行有限元法分析,最后与二极管的非线性部分联合进行谐波平衡仿真,通过仿真优化获得二极管的最佳嵌入电路。最终,仿真结果显示在3.3m W的本振驱动功率下,射频频率420~460GHz范围内单边带变频损耗低于10d B,在437GHz附近取得最佳值7.3 d B。

The design and simulation results of a 440 GHz sub-harmonic mixer based on planar anti-parallel Schottky barrier diodes are presented in this paper.By using three dimensional modeling method, the circuit is designed on suspended microstrip with the anti-parallel diode pair flip-chipped onto the quartz substrate.Based on finite element analysis and the method of harmonic balance, the 440 GHz sub-harmonic mixer's system level modeling is studied.A best conversion loss of 7.3d B is achieved with 3.3m W LO power at 437 GHz.and over the RF band of 420~460 GHz, the single side-band conversion loss is below 10 d B.