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.

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.