基于中国电子科技集团公司第十三研究所的反向并联肖特基二极管,采用电磁场和电路软件联合仿真,完成了0.22 THz分谐波混频电路设计。在固定中频输出频率10 MHz的条件下测试了混频电路的变频损耗,在175~235 GHz共60 GHz带宽内双边带变频损耗小于15 d B,在196 GHz处最佳变频损耗为8.5 d B。测试结果与仿真结果趋势吻合良好。基于冷热负载,测试了分谐波混频电路的噪声温度,当本振功率为5.7 m W时,在216 GHz处双边带噪声温度为1 200 K。 Based on the anti-parallel schottky diode of thirteenth institute of China Electronics Technology Corporation, the design of 0.22 THz subharmonic mixer was completed by co-simulation of electromagnetic field and circuit software. The conversion loss of the mixer circuit was tested at a fixed mid-frequency output frequency of 10 MHz. The double-side band loss loss was less than 15 d B in a total bandwidth of 175-235 GHz with a maximum conversion loss of 8.5 d B at 196 GHz . The test results agree well with the simulation results. The noise temperature of the subharmonic mixer circuit was tested based on the heat and cold loads. The double-sided noise temperature was 21600 K at 216 GHz at a local oscillator power of 5.7 mW.