Resonances and reactive effects due to higher-order modes represent a rather popular concern among microwave engineers dealing with the design and modeling of passive components. The terms spurious and parasitic are indeed the words of choice when referring to those effects, and, although such a historic bad reputation is well deserved for most applications, in the last decade or so, there has been a particular discipline where these parasitic effects have suddenly earned new respect and dignity: the discipline of microwave filters.

中文翻译：

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非谐振模式做得更好！：结合操作模式利用附加模式来设计质量更好的滤波器

高阶模式引起的谐振和电抗效应是处理无源元件设计和建模的微波工程师普遍关注的问题。在提到这些效应时，术语虚假和寄生确实是首选词，尽管这种历史性的坏名声对于大多数应用来说是当之无愧的，但在过去十年左右的时间里，出现了一个特定的学科，这些寄生效应具有突然赢得了新的尊重和尊严：微波过滤器的学科。