基于功率合成技术的V波段倍频源

V-Band Frequency Source Based on Power Synthesis Technology

赫兹倍频链通过对低频段微波信号多次倍频,可以获得高稳定、低相位噪声的太赫兹频率源,应用前景广阔。倍频链越高频,需要驱动功率越不容易达到,为提高V波段倍频链功率,尝试了倍频功率合成方法,该方式与放大器功率合成相比,具有相位差影响和频率加倍的特点。研制出了V波段4路倍频源,对倍频合成工作原理、倍频效率和高次谐波抑制效果进行了验证。测试结果表明:在66～75GHz范围内,V波段倍频器均可获得20dBm以上的2次谐波倍频功率输出,最大功率为24dBm,带内波动约为4dB,功率合成效率大于85%。

Through the multiple frequency amplification, THz multiplier chain can obtain high stability, low phase noise terahertz signal from the low frequency microwave signal. In order to improve the power of the V-band frequency source, 4-way multiplier power combining was proposed. Combining analysis of electromagnetic field theory and three-dimen-sional electromagnetic simulation software HFSS and ADS, the design performance and efficiency of the source were ana-lyzed. The experimental results show that output power is above 20dBm in range of 66-75GHz, the maximum power is 24dBm, and the synthetic efficiency is above 85%.