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  • Question

  • Which TM mode in rectangular waveguide has lowest cutoff frequency?


  • Options
  • A. TM11
  • B. TM01
  • C. TM10
  • D. TM21

  • Correct Answer
  • TM11 

    Explanation
    Hz = 0

    Which TM mode in rectangular waveguide has lowest cutoff frequency? TM11 TM01 TM10 TM21 Hz = 0 Ex =

    Which TM mode in rectangular waveguide has lowest cutoff frequency? TM11 TM01 TM10 TM21 Hz = 0 Ex =

    Which TM mode in rectangular waveguide has lowest cutoff frequency? TM11 TM01 TM10 TM21 Hz = 0 Ex =

    Ex = ± ZTM Hy

    Ey = ± ZTM Hx

    where E0 is the amplitude of the wave.

    The expressions for ?, ?c, fc, ?g, a are the same as for TE waves.

    For TM wave the lowest cut off frequency in rectangular wave guide is for TM11 mode.

    If Which TM mode in rectangular waveguide has lowest cutoff frequency? TM11 TM01 TM10 TM21 Hz = 0 Ex = , the cutoff frequency for TM11 mode is about 12% more than that for TE20 mode.

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