The mode in a rectangular waveguide which has the lowest cut-off frequency is called a dominant mode. For rectangular waveguide, the dominant mode is TE10 , which is the lowest possible mode. Whereas, two or more modes having same cut-off frequency but different field configuration are called degenerate modes.
TE denotes the Transverse Electric modes of a waveguide. Here, the electric field vector will be always perpendicular to the direction of propagation.
What is dominant mode and degenerate modes in circular waveguide?
Ansys customers with active commercial software licenses can access the customer portal and submit support questions. You will need your active account number to register.