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Waveguide Parameters for Rectangular Waveguide

The phase vel...

Question

The phase velocity for the $T E_{10}$ mode in an air-filled rectangular waveguide is

Note: (c) is the velocity of plane waves in free space)

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Solution

Ans : (c)

$V_{p} = \frac{c}{c o s θ} = \frac{c}{\sqrt{1 - {(\frac{f_{c}}{f})}^{2}}}$

with f > $f_{c}$ , $V_{p}$ > c always.

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