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Waveguide Parameters for Rectangular Waveguide

If the freque...

Question

If the frequency of operation of a rectangular waveguide above cutoff frequency is increased, then the wave impedance for TE and TM modes are respectively.

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Solution

$η_{T E} = \frac{η_{0}}{\sqrt{1 - {(\frac{f_{c}}{f})}^{2}}}$

$η_{T M} = η_{0} \sqrt{1 - {(\frac{f_{c}}{f})}^{2}}$

$∴ A s f ↑ η_{T E} ↓ a n d η_{T M} ↑$

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