How is it possible for a TM wave to have an electric field component parallel to the propagation direction?

一沙一世

How is it possible for a TM wave to have an electric field component parallel to the propagation direction? [Copy link]

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I have a question while studying [Electromagnetic Field Microwave Technology and Antenna] during this period. I would like to ask you:

The information says that [TM wave (Transverse Magnetic Wave): the magnetic field is completely perpendicular to the propagation direction, while the electric field may have a component parallel to the propagation direction], but in electromagnetic waves, the electric field and magnetic field are completely perpendicular, and the magnetic field is completely perpendicular to the propagation direction. How is it possible that [the electric field may have a component parallel to the propagation direction]? In this case, the electric field should also be completely perpendicular to the propagation direction, right?

maychang

This is not something that can be explained in a few words. I suggest you read this post: How to understand the microwave pattern in the waveguide

一沙一世

maychang posted on 2024-8-12 17:15 This is not something that can be explained in a few words. I suggest you read this post: How to understand the microwave mode in the waveguide in a vivid way

Thank you very much. Please look at the picture below. Is there such an electromagnetic wave?

一沙一世

Alas, now only the moderators of EEWORLD are struggling to answer a few questions.

maychang

Yishayishi published on 2024-8-13 08:17 Thank you very much. Please look at the picture below. Is there such an electromagnetic wave?

[Please look at the picture below. Is there such an electromagnetic wave? ]

It’s actually Korean!

What is the black arrow pointing to the lower left in the picture? Is it the direction of propagation? There is no text description, so it is hard to say.

If the black arrow is the propagation direction, then the red arrows (magnetic field) and blue arrows (electric field) distributions are possible.

maychang

Yishayishi published on 2024-8-13 08:18 Alas, now only the moderators of EEWORLD are struggling to answer a few questions.

[Now only the moderators of EEWORLD are struggling to answer a few questions]

This is the case for every electronic technology website.

一沙一世

maychang posted on 2024-8-13 09:38 [Now only the moderators of EEWORLD are struggling to answer a few questions] This is the case for every electronic technology website.

It turned out that I didn’t even understand the incident plane, so I asked such a funny question.