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Unformatted text preview: Assignment #7 1. In a rectangular wave guide a=1.5 cm b=.8 cm ,σ =0 , µ r =1 , ε =4 ε and magnetic field is given by: H x =2sin ( π x/a) cos (3 π y/b) sin ( π *10 11 t- β z) A/m Determine a. The mode of operation b. The cut-off frequency c. The phase constant d. The propagation constant γ e. The wave impedance η 2. A rectangular waveguide with dimensions a=2.5 cm, b=1cm is operated below 16 GHz. How many TE and TM modes can the wave guide transmit if guide is filled with a medium by σ =0, ε =4 ε , µ r =1? Calculate the cut-off frequency of the modes. 3. A rectangular wave guide sides a × b, is closed at one end by perfectly conducting plane so that it is short circuited. Assume wave guide support TE 10 mode. Find the resultant electromagnetic waves. 4. A rectangular hole of 5 cm diameter through which a rectangular wave guide carrying dominant mode @ 10 GHz is to be passed is shown in figure below. What should be the wave guide dimension so that maximum power is transmitted through...
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- Spring '10
- Frequency, wave guide, rectangular wave guide