STUPIDSID
1(a)
Derive equations for voltage and currents for transmission line.
8 M
1(b)
The characteristics impendance of a certain line is &neg; 10∠-16°, when frequency is Khz. At this frequency the attenuation is 0.071 NP/km phase constant is 0.35 rads/km. Calculate resistance, inductance capacitance for 1 km and also velocity of propagation.
6 M
1(c)
Determine the input impedance of a 200Ω line, 3/8 wavelengths long terminated i 100Ω resistance, using smith chart. Also find k in magnitude and angle.
6 M
2(a)
What are the properties of wave guide? Obtain the expression for Hz in the case of T.E. waves applying all boundary conditions.
8 M
2(b)
The cut-off wave lengths of a rectangular waveguide was measured to be 8 cm and 4.8 cm when excited in TE10 and TE11 modes respectively. Determine the dimensions of the wave guide.
6 M
2(c)
Explain the working of a four port circulator.
6 M
3(a)
With a neat sketch expalin how PIN diode acts as a swtich. Find the expression for insertion loss.
8 M
3(b)
Explain RWH theory in GUNN diodes and give its constructional details.
6 M
3(c)
Calculate the operating frequency of silicon based IMPATT diode with drift length of 2μm and drift velocity of 107 cm/sec.
6 M
4(a)
Give the S-matrix representation for multiport network. Also explain the properties of S-matrix.
8 M
4(b)
What is an H-plane Tee junction? Derive its S-matrix.
6 M
4(c)
What are phase shifters? Explain a rotary precision phase shifter with a neat sketch.
6 M
5(a)
Explain a magic Tee structure and its S-matrix. Also give its various applications.
8 M
5(b)
What are micro strip lines ? Explain the field distribution with a neat sketch.
6 M
5(c)
A micro strip line is composed of zero thickness 2.4 mm. If the line width is 1 mm and operated at 10 Ghz. Calculate Zo, the attenuation due to conductors and dielectric loss.
6 M
6(a)
Name the various types RADAR. Derive the radar range equation.
8 M
6(b)
A 1 kW, 3GHz radar uses single antenna with a gain of 30 dB. The receiver has noise band width of 1KHz and noise factor of 5 dB. A target of echoing area of 10 m 2 at a range of 10 nautical miles is to be detected. Calculate the minimum S/N.
6 M
6(c)
Explain block diagram of a radar with a neat diagram and explain each block.
6 M
7(a)
Explain with a neat diagram the working of a coherent MTI radar.
8 M
7(b)
Explain the various applications of radar.
6 M
7(c)
Explain the need of delay line cancellers in MTI radars. Also give the characteristics of single delay line canceller.
6 M
8(a)
Explain with a neat block diagram the working of a simple digital MTI signal processor.
7 M
8(b)
Explain the working of a moving target detector with block diagram.
7 M
8(c)
Explain with a neat block diagram the working of a pulse Doppler RADAR.
6 M
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