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Solved Problems-10

Problem-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?
Solution
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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