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Waveguide Parameters for Rectangular Waveguide

Consider the ...

Question

Consider the following statements regarding a rectangular wavelength:
1. The cutoff frequencies of $T E_{m n}$ and $T M_{m n}$ modes are diffrent, for given values of m and n (for m, n > 0).
2. Phase velocity inside the waveguide must be less than or equal to the speed of light.
Which of the above statements is/are wrong?

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Solution

Both 1 and 2

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