The method described has the important advantage over known methods of Q-factor measurement in that the unloaded Q-factor of the resonator is obtained directly. It is derived from the reflection coefficient measured at the coupling cross-section of the resonator at resonance, and the frequency interval between two points of the response curve at which the reflection coefficient reaches a certain value obtained from the theory. At these two points the real and imaginary components of the impedance of the cavity are equal. The value of Q is calculated from the familiar equation Q = f/2ÿf. Although the method was developed primarily for 2-terminal networks, it can also be used for transmission and reactance cavities. The loaded Q and the external Q can be calculated using the data obtained from the unloaded Q-measurement. An outline of the derivation of the formulae is also given.
展开▼
机译：相对于已知的Q因数测量方法，所描述的方法具有重要的优点，因为可以直接获得谐振器的空载Q因数。它是从谐振器的耦合截面在谐振时测得的反射系数，以及从理论上获得的反射系数达到一定值的响应曲线的两点之间的频率间隔得出的。在这两点上，空腔阻抗的实部和虚部相等。 Q的值是从熟悉的方程Q = f /2Δf计算出来的。尽管该方法主要是为2端网络开发的，但也可以用于传输和电抗腔。可以使用从卸载的Q测量获得的数据来计算加载的Q和外部Q。还给出了公式推导的概述。
展开▼
