Multiple choice

The modes in a rectangular waveguide are denoted by where m and n are the eigen numbers along the larger and smaller dimensions of the waveguide respectively. Which one of the following statements is TRUE?

  1. The TM10 mode of the wave does not exist

  2. The TE10 mode of the wave does not exist

  3. The TM10 and the TE10 modes both exist and have the same cut-off frequencies

  4. The TM10 and TM01 modes both exist and have the same cut-off frequencies
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$TM_{11}$ is the lowest order mode of all $TM_{11}$ modes

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