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In a circular waveguide the dominant mode is

Correct Answer: TE11

Explanation:

Some applications require dual polarization capability. Circular waveguide has this capability.


These analysis uses cylindrical coordinates.


In circular waveguide TE11 mode has the lowest cut off frequency and is the dominant mode.


If D is diameter of waveguide


λc = 1.706 D for TE11 mode


λc = 1.029 D for TE21 mode


λc = 0.82 D for TE01 mode


λc = 1.306 D for TM01 mode.


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