Answer to Question #221891 in Electrical Engineering for Ubaidullah

Question #221891

Assume a rectangular waveguide with dimensions a=2 cm and b=1cm. The 

waveguide is filled with air and the operating frequency is 50MHz. Find the 

propagation constant, guide wavelength and cut off frequency for TE10, 

TM11 and TE20 modes


1
Expert's answer
2021-08-03T04:07:01-0400

a)Propagation constant is given by the formula below

a=0.02m,b=0.01m

For TE10 mode, m=1,n=0

f=50MHz

For TM11 mode

m=1,n=1

For TE20, m=2, n=0

The guide wavelength cannot be calculated without cutoff frequency.

For TE10 mode,m=1,n=0

for TM11 mode,m=n=1

for TE20 mode, m=2, n=0

guide wave is given by

Guide wavelength exist for only TE20 mode



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