STUPIDSID
1 (a)
Microstrip line is also called an open strip line. Comment on this.
5 M
1 (b)
What do you understand by the terms cutoff wavelength, dominant mode, guide wavelengths, phase velocity and wave impedance.
4 M
1 (c)
Explain the action of a rat-race junction.
5 M
1 (d)
Discuss the power frequency, current frequency and power gain frequency limitations with reference to a microwave transistor.
4 M
2 (a)
What is the importance of beam-coupling coefficient. Derive line equation of velocity modulation in klystron.
9 M
2 (b)
A refler klystron operster at 8 Ghz at the peak of n=2 mode with Vo=300V Rsn=20kΩ and L=1mm. If the gap transit time and beam loading are neglected, find the (a) Repeller voltage (b) Beam current necessary to obtain an RF gap voltage of 200V.
9 M
3 (a)
Discuss design procedure for filter using insertion loss method. Compare this with image-paramter method.
10 M
3 (b)
Explain the procedure of measurement of dielectric constant at microwave frequency.
10 M
4 (a)
Describe different modes of oscillation of gun-diode. Differentiate between transferred electron devices and transistors.
10 M
4 (b)
How is bunching activated in a cavity magnetron. Explain phase focusing effect. What is strapping in magnetron.
10 M
5 (a)
Describe in detail the operation of a 2-hole directional coupler. Calculate the coupling factor if the power in the primary waveguide is 72 mw and the power delivered to the directional coupler is 8 mw.
10 M
5 (b)
A single stubtuner is to match lossless line of 400? to a local of 800-j300?. The frequency is 3GHz.
i) Find the distance in meters from load to a tuning stub.
ii) Determine the length in meter of the short circuited stub.
i) Find the distance in meters from load to a tuning stub.
ii) Determine the length in meter of the short circuited stub.
10 M
6 (a)
Explain the working of a negative resistance Parametric amplifier and explain its application.
10 M
6 (b)
Derive plane wave equation and explain the significance.
10 M
7 (a)
Explain Traveling wave to be as an amplifier.
4 M
7 (b)
Explain Hybrid junction.
4 M
7 (c)
Explain Brillouin flow and derive an expression for Brillouin magnetic field Br.
8 M
7 (d)
Design a circulator using Magic-T.
4 M
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