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Solved Problems-10

A 6 GHz signal is to be propagated in the dominant mode in a rectangular waveguide. If its group velocity is 90% of the free-space velocity of light, what must be the breadth of the waveguide?
Free-space wavelength is, Description: 43838.png
From we know that,
Description: 43828.png (given)
Description: 43819.png
Hence, the wavelength within the guide is 5.55 cm.
The cut-off wavelength is given as,
Description: 43811.png
So, the breadth of the guide is given as, Description: 43802.png
Description: 43795.png

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