Question

Why te 10 mode does not exist in circular waveguide

Answer 1

Answer:

Explanation:

The internal walls of the waveguide are not mirrored surfaces, but instead electrical conductors. ... The TEM mode cannot propagate in these single conductor transmission lines. Only higher modes in the form of transverse electric (TE) and transverse magnetic (TM) modes can propagate in the waveguide.

Answer 2

Answer:

In a circular waveguide TM10 mode cannot propagate. Because for this mode the Ez component identically vanishes. So then we cannot have a TM mode.

Explanation:

• In TE modes of the circular waveguide, there is not a longitudinal component of electric fields. Only the longitudinal components of the magnetic field are present in TE modes.
• Corresponding to the m and n values, there are variants of TE modes present in circular waveguides, such as TE01, TE02 , TE11, and TE12. TE01 is the  TE mode in the circular waveguide that offers low attenuation characteristics with increasing frequency.