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电流微扰公式在微波电子学中经常被用来分析电子流与慢电磁波间的相互作用现象;亦被用来推导介质对谐振腔的微扰公式,从而作为慢波系统耦合阻抗的测量依据。它长期为人们所采用。这里将给出这一公式的详细证明以弥补原始文献的简略结论。我们将从图1所示的周期不均匀传输系统出发(均匀传输系统的证明可参看有关文献)。
The current perturbation formula is often used in microwave electronics to analyze the interaction between electron current and slow electromagnetic wave. It is also used to derive the perturbation formula of the medium to the resonant cavity, which can be used as the measurement basis for the coupled impedance of the slow-wave system. It has long been adopted by people. A detailed proof of this formula will be given here to make up the brief conclusions of the original document. We will proceed from the non-uniform periodic transmission system shown in Figure 1 (for proof of uniform transmission system see the literature).