Exam2 - Tutorial 9 EC2204 April 18, 2013 Q1- You have...

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Exam #2 ELEG 413 Spring Semester 2011 Name __________________________ Directions: There are 4 problems worth the same amount. Do all four problems. Please write clearly and show all your work for partial credit.
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1. A L-band (1 to 2 GHz) waveguide with dimensions of 5.0 cm and 2.5 cm is filled with a dielectric ( r = 9.0) and operated at 1.5 GHz. For the dominant mode only determine: (a) the range of frequencies that will propagate (b) guided wavelength ( g ) (c) wave impedance (d) If one decides to use the waveguide as an antenna by radiating from an open end into air what percentage of the power will be reflected back towards the source?
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2. An AM radio in an automobile cannot receive any signal when the car is inside a tunnel. Consider, for example, the Lincoln Tunnel under the Hudson river, which was built in 1939. Model the tunnel as a rectangular metallic waveguide of dimensions 6.55 by 4.19 meters. 10 points (a) Give the range of frequencies for which only the dominant mode, TE
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Exam2 - Tutorial 9 EC2204 April 18, 2013 Q1- You have...

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