Microwaves And Radar

c. A 20 MW signal is fed into one of collinear port 1 of a lossless H-plane T-junction.Calculate power delivered through each port when other ports are terminated in matched load. 

 Write short notes on 

ii) C.W. Doppler Radarb.

a. Derive Radar range equation in terms of effective aperture, radar cross section of target and minimum detectable signal power of receivers.

b. Discuss various application of Radar.

c. With respect to Radar system, explain:

i) Maximum unambiguous Range

 With respect to Radar system, explain:

ii) Clutter attenuationc.

 With respect to Radar system, explain:

iii) Improvement factor

 With respect to Radar system, explain:

iv) Doppler shift

a. Explain MTI Radar with neat block diagram 

c. Compare stripline and microstripline.

 Write short notes on 

iii) Pulsed Radar

 Write short notes on 

iv) Blind speed

b. Write short notes on any two:

i) Delay line canceller  

Derive the following loss in a microwave network in terms of S-parameter:

i) Insertion loss

Derive the following loss in a microwave network in terms of S-parameter:

ii) Transmission loss

Derive the following loss in a microwave network in terms of S-parameter:

iii) Reflection loss

Derive the following loss in a microwave network in terms of S-parameter:

iv) Return loss

a. Starting from fundamental, derive the expression for the voltage and current at any point on the transmission line.

b. Explain the construction and field pattern for microstripline.

4. Explain the various losses taking place in microstriplines,

b. Explain H-plane Tee junction and derive the S-matrix also.

a. With neat diagram, explain the working of rotary precision phase shifter. 

c. Two transmission lines of characteristic impedance z₁ and Z₂ are joined at plane     pp¹.Express s-parameter in terms of impedance.

b. State and explain properties of S-parameters.

c. What is Gunn'effect? Explain with constructional details of a Gunn diode.

b. An M-SI-M BARITT diode has the following parameter:

i) Relative dielectric constant of silicon g_r = 11.8

ii) Donor concentration, N = 2.8 x 10²¹/m

iii) Silicon length, L =6

Determine the breakdown voltage and the breakdown electric field.

a. Explain with a neat diagram the construction and working of PIN diode and Schottkey barrier diode. 

 c. With diagram, explain working of two hole direction coupler and also derive s-matrix for the same. 

b. With neat diagram, explain Faraday's rotation isolator.

a. A load of ZR-115-1752 terminates at a lossless 1000 line. Use Smith chart to determine:(i) SWR, (ii) I/P impedance of a 0.2  long line, (ii) the distance from load to first voltage maximum. 

c. Define and derive expression for reflection coefficient and transmission coefficient for a transmission line. 

b. A transmission line has the following primary constants, R = 10.4  L = 0.00367 H/km, G=0.8 x 10^-6 /km, C =0.00835 F/km. Find  and z_o.