Dominant modes and degenerative modes for waveguides

Hello there, how can we differentiate the dominant modes and degenerative modes for waveguides?


  • VivekKVivekK Pune, IndiaForum Coordinator

    Hello Navya,

    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.

  • nchodenchode Forum Coordinator
    Thank you for the quick reply. What is meant by TE as for dominant mode?
  • VivekKVivekK Pune, IndiaForum Coordinator

    Hi Navya,

    TE denotes the Transverse Electric modes of a waveguide. Here, the electric field vector will be always perpendicular to the direction of propagation. 

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