中文摘要：

介绍了一个用于混频器设计的肖特基二极管模型.根据二极管的物理结构,建立了三维电磁模型,并采用有限元法分析该模型.根据二极管中分布的寄生效应,建立了直到110 GHz的宽带等效电路.基于该等效电路,设计并优化了一个Ka频段的平衡式混频器.在32～37 GHz频率范围内,测试的变频损耗为7.5～10 dB.测试结果与仿真结果吻合地较好.

英文摘要：

A Schottky diode model for the mixer＇s design is presented in this paper.According to the physical structure of the Schottky diode,a novel 3D electromagnetic（EM） model was built and analyzed by finite element method.A wide-band equivalent circuit up to 110 GHz was proposed taking the parasitic effects distributed in the diode into account.Based on the proposed equivalent circuit,a Ka-band balanced mixer was designed and optimized.The measured conversion loss is 7.5 dB to 10 dB from 32 GHz to 37 GHz,which agreed well with the simulated one.