采用反向并联肖特基二极管对设计了一种330 GHz二次谐波混频器。混频器电路采用微带结构，使用波导-微带探针耦合的形式进行过渡；采用50 μm厚的石英作为基板，有效减小了电路体积；采用HFSS和ADS对电路进行仿真和谐波平衡仿真。仿真结果显示，混频器在310~350 GHz范围内的变频损耗优于9.5 dB，所需本振(LO)功率为3 dBm，有效降低了对本振的要求。

A novel 330 GHz sub-harmonic mixer based on anti-parallel Schottky diode pair is proposed. Microstrip circuit is used with waveguide-microstrip probe transition. Quartz glass of 50 μm thickness is adopted as the substrate, which is good for size-reduction. HFSS is utilized for 3D simulation first and then ADS for harmonic balance simulation. The simulation results show that the conversion loss is better than 9.5 dB form 310-350 GHz. The required Local Oscillator(LO) power is only 3 dBm, which 　reduces the demand on LO source.