Ultrawideband Millimeter-Wave Oscillators Based on Two Coupled Gyro-TWTs With Helical Waveguide
Ultrawideband Millimeter-Wave Oscillators Based on Two Coupled Gyro-TWTs With Helical Waveguide
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DOI：
10.1109/ted.2018.2801021
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发表时间：
2018-06
影响因子：
3.1
通讯作者：
N. Ginzburg;G. Denisov;M. Vilkov;I. Zotova;A. Sergeev;R. Rozental;S. Samsonov;S. Mishakin;A. Marek;J. Jelonnek
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文献类型：
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作者：
N. Ginzburg;G. Denisov;M. Vilkov;I. Zotova;A. Sergeev;R. Rozental;S. Samsonov;S. Mishakin;A. Marek;J. Jelonnek
我们正在考虑在由两个耦合螺旋波导陀螺行波管组成的微波振荡器中产生超宽带毫米波的可能性，其中一个用作放大器，而另一个用作可饱和吸收器或非线性转换器。在第一种情况下，当辐射代表超短电磁脉冲的周期性序列时，实现无源锁模机制。谱域对应于微波“频率梳”的形成。另一方面，如果第二个陀螺行波管充当相位特性快速变化的非线性转换器，则会导致产生具有准连续频谱和高达~10%带宽的混沌信号，该带宽由陀螺行波管的带宽定义。
We are considering the possibility of ultrawideband millimeter-wave generation in microwave oscillators consisting of two coupled helical-waveguide gyro-TWTs, one of which operating as an amplifier whereas the other acting as a saturable absorber or as a nonlinear converter. In the first case, the regime of passive mode-locking is realized when the radiation represents a periodical train of ultrashort electromagnetic pulses. The spectral domain corresponds to the formation of a microwave “frequency comb.” On the other hand, if the second gyro-TWT acts as a nonlinear converter with a fast variation of the phase characteristic, it leads to the generation of chaotic signals with quasi-continuous spectrum and a bandwidth of up to ~10% which is defined by the bandwidth of the gyro-TWTs.