0
$\begingroup$

Google told me the operation frequency is 125% - 190% of the cutoff frequency. But I did not find any other material for reasoning.

My question: What happens if frequency was too high?

$\endgroup$
1
$\begingroup$

The maximum operating frequency of a waveguide is typically limited by the higher order modes. If you try to use the waveguide at a frequency where multiple modes can propagate, you will get some coupling between these modes, which will cause some signal power to travel faster than the main signal. This generally causes problems depending on how the signal is being used.

$\endgroup$
  • $\begingroup$ That answers my question, thank you. $\endgroup$ – Chtholly Aug 24 '20 at 0:02
  • $\begingroup$ @Chtholly rather than post a thank you comment you should upvote our accept the answer. $\endgroup$ – The Photon Aug 24 '20 at 0:31

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.