Topic: Electromagnetics
Indicate which one of the following modes do NOT exist in a rectangular resonant cavity
- A. TE110
- B. TE011
- C. TM110
- D. TM111
Answer: A. TE110
Explanation: In a rectangular resonant cavity, the $TE_{110}$ mode does not exist because a transverse electric mode requires at least one non-zero index in the direction of wave propagation within a completely closed cavity structure.