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对于信号回路双调谐、空闲回路单调谐的非简并参量放大器,叙述了一种新的精确设计理论。如果考虑到信号回路电阻(而这是以前的文章所忽略的),则存在着一个放大器增益为正的频带。在本文中,增益的带内特性即与此频带有关。空闲和信号回路的斜率参数是用与二极管自身有关的斜率参数来进行归一化的。用归一化斜率参数把实际电路与增益—带宽特性联系起来。外加信号谐振器的斜率参数与二极管的负斜率参数有关,给出了获得稳定放大时对此比值的限制。列出了用计算机算出的设计表格,其中有偶合比以及外加信号谐振器的斜率参数。在19GHz上作了实验。正增益带宽约为4.0GHz,10dB增益时的平坦增益约为2.4GHz,这些带宽的比值与理论甚相符合。
For a non-degenerate parametric amplifier with a double tuned signal loop and a single tuned free loop, a new precise design theory is described. If we take into account the resistance of the signal loop, which is neglected in previous articles, there is a band with a positive amplifier gain. In this paper, the in-band gain of gain is related to this band. The slope parameters for Idle and signal loops are normalized with the slope parameters associated with the diodes themselves. Use normalized slope parameters to relate the actual circuit to the gain-bandwidth characteristics. The slope parameter of the external signal resonator is related to the negative slope of the diode and gives the limit to this ratio when gaining a stable amplification. A computerized design chart shows the coupling ratio and the slope parameters of the applied signal resonator. Experimented at 19GHz. The positive gain bandwidth is about 4.0GHz and the flat gain at 10dB gain is about 2.4GHz. The ratios of these bandwidths are in good agreement with the theory.