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The article states
"The TEM0i* mode, the so-called doughnut mode, is a special case consisting of a superposition of two TEM0i modes (i=1,2,3), rotated 360°/4i with respect to one another."
Is this referring to two instances of the same mode, one being rotated then both being combined?
Or does it mean "TEM01 and TEM02 (for example) are rotated relative to each other and combined"?
It does not appear to form a 'doughnut' in the second case - could the wording on this be improved if the meaning is the former?
The comment(s) below were originally left at Talk:Transverse mode/Comments, and are posted here for posterity. Following several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.
It says that TEM modes can exist in a waveguide. When Ez and Hz equal 0 this makes all other field components equal to zero, hence a TEM wave cannot exist inside a waveguide. Candy Coloured Clown 15:51, 26 February 2007 (UTC) |
Last edited at 15:51, 26 February 2007 (UTC). Substituted at 09:11, 30 April 2016 (UTC)
In the semiconductor field :
TE mode : mode with neither electric nor magnetic field in the direction of propagation AND electric field in the plane of the wafer
TM mode : mode with neither electric nor magnetic field in the direction of propagation AND magnetic field in the plane of the wafer
So if x is the direction of propagation and z the direction perpendicular to the wafer plane :
TE mode : E=Ey, H=Hz
TM mode : E=Ez, H=Hy — Preceding unsigned comment added by Ianniss (talk ( talk • contribs) 14:55, 12 February 2017 (UTC)
Our coaxial cable article says that having multiple TM modes is "undesirable" since they can interfere with each other, but it doesn't say why that's a problem. I'm guessing that you might get fluctuating amplitude at the load end of the cable. If we can answer this question for the coax article, the same answer should apply to this article. -- Heron ( talk) 11:22, 26 May 2020 (UTC)
This
level-5 vital article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||
|
The article states
"The TEM0i* mode, the so-called doughnut mode, is a special case consisting of a superposition of two TEM0i modes (i=1,2,3), rotated 360°/4i with respect to one another."
Is this referring to two instances of the same mode, one being rotated then both being combined?
Or does it mean "TEM01 and TEM02 (for example) are rotated relative to each other and combined"?
It does not appear to form a 'doughnut' in the second case - could the wording on this be improved if the meaning is the former?
The comment(s) below were originally left at Talk:Transverse mode/Comments, and are posted here for posterity. Following several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.
It says that TEM modes can exist in a waveguide. When Ez and Hz equal 0 this makes all other field components equal to zero, hence a TEM wave cannot exist inside a waveguide. Candy Coloured Clown 15:51, 26 February 2007 (UTC) |
Last edited at 15:51, 26 February 2007 (UTC). Substituted at 09:11, 30 April 2016 (UTC)
In the semiconductor field :
TE mode : mode with neither electric nor magnetic field in the direction of propagation AND electric field in the plane of the wafer
TM mode : mode with neither electric nor magnetic field in the direction of propagation AND magnetic field in the plane of the wafer
So if x is the direction of propagation and z the direction perpendicular to the wafer plane :
TE mode : E=Ey, H=Hz
TM mode : E=Ez, H=Hy — Preceding unsigned comment added by Ianniss (talk ( talk • contribs) 14:55, 12 February 2017 (UTC)
Our coaxial cable article says that having multiple TM modes is "undesirable" since they can interfere with each other, but it doesn't say why that's a problem. I'm guessing that you might get fluctuating amplitude at the load end of the cable. If we can answer this question for the coax article, the same answer should apply to this article. -- Heron ( talk) 11:22, 26 May 2020 (UTC)