What'a difference between TEM wave and plane wave?

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Homework Help Overview

The discussion revolves around the differences between Transverse Electromagnetic (TEM) waves and plane waves, focusing on their definitions and characteristics within the context of electromagnetic theory.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the definitions of TEM and plane waves, questioning why different terms are used if they are fundamentally the same. They raise points regarding the derivation of the Helmholtz equation and the specific terminology used in transmission lines.

Discussion Status

The discussion is ongoing, with participants providing insights and asking for clarification on definitions and distinctions. Some participants express uncertainty about the differences, while others seek references to support their claims.

Contextual Notes

Participants mention specific contexts, such as the derivation of the Helmholtz equation and applications in transmission lines like coaxial cables, which may influence their understanding of the terms used.

baby_1
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Hello
what'a difference between tem wave and plane wave?
I think in tem is the same as plane wave but it's electromagnetic amplitude decrease ,is it right?if yes how does amplitude decrease?
 
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baby_1 said:
Hello
what'a difference between tem wave and plane wave?
I think in tem is the same as plane wave but it's electromagnetic amplitude decrease ,is it right?if yes how does amplitude decrease?

What makes you think they are different? What definitions have you found in your reading?
 
Hello
Thank you for your response
because of different reasons:
1)if they are the same why we use different definition
2)when we want to derive helmholtz equation we declare it for Plane wave not TEM
3)if they are the same why we tell them in some transmission line(such as coaxial) TEM not plane wave

any help would greatly appreciate
 
baby_1 said:
Hello
Thank you for your response
because of different reasons:
1)if they are the same why we use different definition
2)when we want to derive helmholtz equation we declare it for Plane wave not TEM
3)if they are the same why we tell them in some transmission line(such as coaxial) TEM not plane wave

any help would greatly appreciate

I'm not familiar with any differences. This entry at wikipedia implies they are the same: http://en.wikipedia.org/wiki/Wave_impedance

Can you post a link to the Helmholtz equation reference that seems to make a distinction?
 

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