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Rectangular Waveguide  
Click here for a table of TE and TM mode field
equations for rectangular waveguides. 

Cutoff Frequency  
The
lower cutoff frequency (or wavelength) for a particular mode in rectangular waveguide is determined by the
following equations:
(Hz)
(m)


TE (Transverse Electric) Mode  
The TE_{10} mode is the dominant mode of a rectangular waveguide with a>b, since it has the lowest attenuation of all modes. Either m or n can be zero, but not both.  
End View (TE_{10}) Side View (TE_{10}) Top View (TE_{10}) ____ Electric field lines _ _ _ Magnetic field lines 
Rectangular Waveguide
TE Mode This example is for WR284, which is commonly used for Sband radar systems. It has a width of 2.840" (7.214 cm) and a height of 1.340"(3.404 cm). 

TM (Transverse Magnetic) Mode  
For TM modes, m=0 and n=0 are not possible, thus, TM_{11} is the lowest possible TM mode. End View (TM_{11}) Side View (TM_{11}) ____ Electric field lines _ _ _ Magnetic field lines 
Circular Waveguide  
Click here for a table of TE and TM
mode field equations for circular waveguides. 

TE (Transverse Electric) Mode  
The lower cutoff frequency (or wavelength) for a particular TE mode in circular waveguide is determined by
the following equation:
(m), where p'_{mn} is


TM (Transverse Magnetic) Mode  
The lower cutoff frequency (or wavelength) for a particular TM mode in circular waveguide is determined by
the following equation:
(m), where p_{mn} is

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