基于多双漂移雪崩倍频管太赫兹功率合成方法

A novel method of power combining at Terahertz frequency based on double drift region avalanche multiplier diodes

太赫兹源辐射功率较低已成为制约太赫兹科学技术发展的主要瓶颈问题。为有效提高太赫兹源辐射功率,提出了基于多双漂移雪崩管的分立腔体倍频方法,在此基础上设计和实现波导结构的太赫兹功率合成器。在倍频器的输入端对各独立激励源的中频信号进行移相,完成倍频输出的精确相位控制,从而实现各单元输出的太赫兹信号同相位合成,提高功率合成效率,避免使用太赫兹频段移相器等部组件的问题,降低实现复杂度,易于实现。仿真和实测结果表明,4路激励源太赫兹功率合成器的合成效率约79%~89%。

The low Terahertz(THz) radiation power has become the main bottleneck restricting the development of Terahertz science and technology. In order to increase the power of THz source, a novel method of detached cavity is proposed to multiply frequency based on double drift region avalanche multiplier diodes, and then the power combiner of waveguide is designed and realized. The phase of the intermediate frequency of the excitation source is adjusted on the input of the frequency multiplier. And then, the phase of the frequency multiplier output radio source can be controlled precisely. Sequentially, the independent signals of THz which are in-phase can be added together. The efficiency of the power combiner is enhanced avoiding using the phase shifter of THz frequency band. The complexity of the processing is reduced and it is easy to be realized. The simulation results and the measured data show that, the efficiency of the power combining working at THz band is 79%-89% approximately.