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本文将在给定级数,响应曲线类型,三分贝带宽之后,计算出谐振子和外电路之间的、谐振子彼此之间的耦合带宽的需要值。有趣的是,与低通滤波器形成对照,信号源电阻、负载电阻、各谐振子的电抗谐率均可分别任意取值,不受限制;滤波和阻抗变换可以同时完成;通带频响仅由耦合带宽决定。本文也将从铁磁共振的基本公式出发,推导出环耦合YIG小球的等效电路,并找出从小球参数和耦合环参数得到耥合带宽计算值的公式。应当注意的是,外耦合带宽公式与前人文献一致,但谐振子间耦合带宽公式与前人文献相距甚远,不过却和实验结果符合得很好。本文也将说明耦合带宽的实验性的非破坏检测方法。这种方法是简单易行的,既可用于滤波器的研制,也可用于批量生产。最后本文将介绍YIG带通滤波器的调试方法,运用这一方法可以大大缩短滤波器的调试时间。
In this paper, we will calculate the required bandwidth of the coupling between the resonator and the external oscillator after the given series, response curve type and three dB bandwidth. Interestingly, in contrast to the low-pass filter, the signal source resistance, load resistance, and the resonant reactance of the individual resonators can be arbitrarily chosen without limitation; the filtering and impedance transformation can be done simultaneously; the passband frequency response Due to the coupling bandwidth. Based on the basic formula of ferromagnetic resonance, this paper also deduces the equivalent circuit of the ring-coupled YIG ball and finds out the formula to calculate the calculated bandwidth from the parameters of the ball and the coupling ring. It should be noted that the formula for out-coupling bandwidth is consistent with previous literature, but the formula for the coupling bandwidth between resonators is far from previous literature, but it is in good agreement with the experimental results. This article will also illustrate the experimental non-destructive detection of coupling bandwidth. This method is simple and easy to use, both for filter development, can also be used for mass production. Finally, this article will introduce the YIG band-pass filter debugging method, the use of this method can greatly shorten the filter debugging time.