STUPIDSID
1(a)
Write abut strip lines.
2 M
1(b)
Write properties of rectangular waveguides.
2 M
1(c)
How does wave propagation takes place through a waveguides?
3 M
Solve any one question from Q.1(d) & Q.1(e)
1(d)
Discuss mathematically the propagation of electromagnetic waves in a rectangular waveguide and obtain equations for TEmn modes.
7 M
1(e)
A rectangular waveguide has a cross-sectional area of 2.29×1.45cm2, and the operating frequency is 10 Ghz, Calculate the following.
i) Cut-off wavelength
ii) Cut-off frequency
iii) Angle of incidence
iv) Guided wavelength
v)Phase velocity
vi) Phase shift constant
vii) Wave impedance of the guide.
i) Cut-off wavelength
ii) Cut-off frequency
iii) Angle of incidence
iv) Guided wavelength
v)Phase velocity
vi) Phase shift constant
vii) Wave impedance of the guide.
7 M
2(a)
Define the following wave-guide components.
i) Flanges
ii) Bends
i) Flanges
ii) Bends
2 M
2(b)
Derive general equations for a scattering matrix.
2 M
2(c)
Write about Magic Tee?
3 M
Solve any one question from Q.2(d) & Q.2(e)
2(d)
Explain working of directional coupler. Derive its scattering matrix.
7 M
2(e)
Explain the following:
i) Waveguide Attenuators
ii) Ferrites
i) Waveguide Attenuators
ii) Ferrites
7 M
3(a)
What is a MASER?
2 M
3(b)
What is a parametric amplifier?
2 M
3(c)
Write a note on PIN diodes.
3 M
Solve any one question from Q.3(d) & Q.3(e)
3(d)
Write a brief note on LASER. What is a negative resistance phenomenon?
7 M
3(e)
Give classification of solid-state devices. And write their applications. What are Transferred Electron Devices (TED's)? Discuss RWH theory?
7 M
4(a)
How interaction of electron beam takes place with an electromagnetic field?
2 M
4(b)
Differentiate between planar and cylindrical magnetrons?
2 M
4(c)
What is Rising sun cavity and strapping?
3 M
Solve any one question from Q.4(d) & Q.4(e)
4(d)
Write about travelling wave tubes under the following:
i) Significance of TWT
ii) Structure of TWT and amplification process
iii) Principle of working
iv) Gain considerations
v) Suppression of oscillations
vi) Nature of the four propagation constants
i) Significance of TWT
ii) Structure of TWT and amplification process
iii) Principle of working
iv) Gain considerations
v) Suppression of oscillations
vi) Nature of the four propagation constants
7 M
4(e)
What are the limitations of conventional tubes at microwave frequencies? Explain reflex klystron under the following:
i) Block diagram
ii) Working principle
iii) Mathematical analysis
i) Block diagram
ii) Working principle
iii) Mathematical analysis
7 M
5(a)
Write about Detector mounts?
2 M
5(b)
What is a slotted line?
2 M
5(c)
What is a VSWR meter?
3 M
Solve any one question from Q.5(d) & Q.5(e)
5(d)
Explain measurement of wave-guide impedance at load port by slotted line? Calculate the VSWR of a rectangular guide of 2.5 cm × 1.0 cm opetating at 10 Ghz. The distance between twice minimum power points is 1 mm.
7 M
5(e)
Give a brief description of blocks of microwave bench and their features? What precautions should be taken while measuring the parameters at microwave frequencies? Calculate the VSWR of a transmission system operating at 15 GHz. The TE10 mode is propagating through the waveguide of dimensions 4.0 and 2.1 cm respectively. The distance between two successive minima is 1.5 mm.
7 M
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