微波谐振腔的谐振过程

The Processing of Resonance in the Resonant Cavity

谐振腔的教学是微波技术课程教学中一个非常重要的部分,也是电磁场与电磁波课程教学的一个有机组成部分.微波谐振腔内部谐振过程的理论依据为波动方程;外部电磁波(激励源)进入谐振腔后只能以模式的形式存在,激励源的频率和谐振频率相等;电磁波在波导和谐振腔中虽然都以模式形式存在但二者的存在条件是不同的;可认为实际有损耗的谐振腔谐振时它内部的场分布和理想情况下的完全相同等结论.理解此四个结论成立的原因,对于掌握谐振腔的谐振过程有重要意义,对于谐振腔的设计也有所帮助.

The resonant cavity is one of the important parts of the teaching on microwave course and it is also an organic part on electromagnetic fields and waves. The article gives these conclusions as following they exist only as modes ： the theoretical foundation of the processing of resonance is wave equations ; when the resonant cavity ex cited, and the frequency of exciter is equal to resonant frequency ;though the electromagnetic wave in the wave guide and resonant cavity all can only exist as modes ,they are different on principle;the field in the real resonant cavity can be approximatively considered the same as in the ideal. It is more important to understand the processing of resonance and it can be helpful for designers by holding the above four conclusions.