Finding Ratio of Lowest Cutoff Frequencies for Waveguide - Quick Question

  • Thread starter Thread starter rabbit44
  • Start date Start date
  • Tags Tags
    Waveguide
rabbit44
Messages
28
Reaction score
0

Homework Statement


I have to find the ratio of the lowest TM cutoff frequency to the lowest TE cutoff frequency.


Homework Equations





The Attempt at a Solution


I have derived the general form of the cutoff frequency (which seems to be the same for both). I get the right answer if I take TE10 and TM11; but why is this? I know why you can't have TE00 or TM00, but why can't TM take TM10?

Thanks
 
Physics news on Phys.org
What shape waveguide is this in reference to?

Assuming you are talking about a rectangular waveguide, what happens to the component of the electric field along the axis of the waveguide for TM10 and TM01? What does that make all the other components? Are those really TM modes?
 

Thread 'Modeling a graph that shows age in relation to depth of an ice sample'

To solve this, I first used the units to work out that a= m* a/m, i.e. t=z/λ. This would allow you to determine the time duration within an interval section by section and then add this to the previous ones to obtain the age of the respective layer. However, this would require a constant thickness per year for each interval. However, since this is most likely not the case, my next consideration was that the age must be the integral of a 1/λ(z) function, which I cannot model.
View full post »

Similar threads

TM and TE waves in coaxial waveguide
Replies
4
Views
2K
Problem on Parallel Plate Waveguide
Replies
12
Views
2K
What is the relationship between frequency and cross section in a waveguide?
Replies
9
Views
3K
TM waves in a rectangular waveguide
Replies
1
Views
2K
TM modes between 2 parallel plates with 2 dielectrics
Replies
6
Views
1K
How Is Waveguide Conductivity Calculated with Changing Frequencies?
Replies
1
Views
3K
Finding Fresnel coefficients from the interface conditions
Replies
1
Views
2K
Understanding Waveguides: Basics and Operation of TE Modes
Replies
1
Views
2K
What determines the frequency of an RF cavity?
Replies
6
Views
2K
Fundamental Resonant Frequency of a Waveguide
Replies
2
Views
5K

Hot Threads

Recent Insights

Back
Top