STUPIDSID
1 (a)
Explain the relationship between work and energy at microwave frequency.
5 M
1 (b)
Justify why waveguide does not support TEM propagation.
5 M
1 (c)
How can circulator be implemented using 2 Magic TEE's and phase shifter of 180o
5 M
1 (d)
Differentiate between Transit time devices and Transferred Electron devices.
5 M
2 (a)
How matched impedance is achieved in transmission line? Explain any one method in detail.
10 M
2 (b)
Explain the construction and working of Microwave FET in detail.
10 M
3 (a)
Why phase focussing is required in magnetron? What is back heating? How it can be controlled?
10 M
3 (b)
Explain the significance of RWH model and two valley model in GUNN diode .
10 M
4 (a)
Explain wave propagation in circular waveguide in detail.
10 M
4 (b)
What are 'O' type tubes? Explain. A TWT operates under following parameters:
Beam voltage : 2.5 KV
Beam current : 50 mA
Characteristic impedance of helix : 6.75Ω
Circuit Length : 45
Frequency : 8 GHz
Determine gain parameter, power gain and all four propagation constants.
Beam voltage : 2.5 KV
Beam current : 50 mA
Characteristic impedance of helix : 6.75Ω
Circuit Length : 45
Frequency : 8 GHz
Determine gain parameter, power gain and all four propagation constants.
10 M
5 (a)
A waveguide has internal length of 3cm and carries the dominant mode of a signal of unknown frequency. If ZTE is 500Ω, what is this frequency?
10 M
5 (b)
What are periodic structures? Why are they termed as filters.
10 M
6 (a)
Why are detectors used at microwave frequency ? Explain its application in detail.
10 M
6(b)
Design a Butterworth low pass filter with microwave components of order 4 with R0=50 Ω operating at a frequency of 3 GHz .
10 M
7 (b)
Resonating Re-entrant cavities .
5 M
7 (c)
Microstrip transmission lines.
5 M
7 (d)
Diode used in Parametric Devices.
5 M
Write short notes on:
7(a)
Measurement of VSWR.
5 M
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