为达到接收机中550 GHz混频器前端本振源的输出功率,对核心器件倍频器进行了研究。采用固态电子器件的方式设计并实现了275 GHz非平衡式三倍频器。通过建立理想倍频器电路模型,分析了肖特基二极管管芯参数对整体倍频器性能的影响,并对电路中等效电容、电感值及输入输出匹配端阻抗和相位进行了优化设计,以提升带外抑制特性和倍频效率。实测结果表明,该三倍频器在270~280 GHz工作频带内倍频效率最大值为10.75%,输出功率大于5 mW;当驱动功率为23 dBm时,最大输出功率为12.6 mW,满足驱动后级混频器工作的功率需求。

In order to meet the output power requirements of the front-end local oscillator of the 550 GHz mixer in the receiver, the core component frequency multiplier was studied in this paper. Based on solid-state electronic devices, the 275 GHz tripler which adopted non-equilibrium structure was designed and implemented. By establishing the ideal frequency tripler circuit model, the influence of Schottky diode parameters on the overall frequency tripler performance was analyzed. The equivalent capacitance and inductance values, as well as the impedance and phase at the input and output matching ends were optimized to improve the out-of-band suppression characteristics and the frequency efficiency. The test results indicate that the maximum efficiency of the frequency tripler in 270~280 GHz working bandwidth is 10.75%, and the output power is greater than 5 mW. Besides, the maximum output power is 12.6 mW at 23 dBm drive power, which meets the power demand of driving the rear-stage mixer.