Q波段宽带功率合成倍频器的设计

Design of a broad Q-band power-combining frequency multiplier

提出了一款输出频率覆盖整个Q波段的高功率固态有源四倍频器模块。倍频器基于混合集成电路技术实现,采用有源二倍频—功率放大—功率分配—无源二倍频—功率合成的拓扑结构。在前级采用基于悬置带线的180°反相器进行功分器设计,以实现宽带性能以及结构紧凑性。在无源二倍频时,采用两个分立的MA4E1310肖特基二极管组成非平衡倍频结构获取其二次谐波,并通过波导双探针进行合成输出,以此突破单个二极管的功率容量制约,进而提高倍频输出功率。测试结果表明,固态倍频源模块在5.5 V/0.9 A的直流偏置以及5 dBm的输入功率下,可以在33~50 GHz全波导频率范围内获得15~19 dBm的输出功率。

A solid-state active frequency quadrupler was proposed to cover the full Q-band and produce high output power.The quadrupler module was realized based on hybrid integrated process and featured the topology of active frequency doubling,power amplification,power splitting,passive frequency doubling and power-combining.To achieve broadband operation and compactness,a suspended strip line based phase inverter was adopted in the power splitter.Two discrete MA4E1310 diodes were used to form an unbalanced topology,and the desired second harmonic signals were combined with the waveguide-dual-probe structure.Therefore,the restriction on power handling capability by a single Schottky diode was removed,which hence produced increased power.The measurement shows that at 5 dBm input power and DC bias of 5.5 V/0.9 A,the developed module can produce an output power of 15-19 dBm in the full waveguide band of 35-50 GHz.