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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%。
Hertz multiplier chain By multiplying the low-frequency microwave signal multiple times, a high-stability, low-phase terahertz frequency source can be obtained, and the application prospect is broad. The higher frequency of the octave band requires less driving power, and in order to increase the power of the octave band, a method of octave power synthesis has been tried. Compared with the power synthesis of the amplifier, the method has the characteristics of phase difference and double frequency . Developed a V-band 4-way frequency source, the multiplying frequency synthesizer working principle, frequency doubling efficiency and higher harmonic suppression effect were verified. The test results show that in the range of 66 ~ 75GHz, the V-band frequency doubler can obtain the second harmonic power of more than 20dBm, the maximum power is 24dBm, the in-band fluctuation is about 4dB and the power synthesis efficiency is more than 85%.