Name of the College : Sphoorthy Engineering College
University : JNTUH
Department : ELECTRONICS AND COMPUTER ENGINEERING
Subject Name : MICROWAVE ENGINEERING
Degree : B.Tech
Year/Sem : III/I
Website : sphoorthyengg.com
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/sphoorthyengg.com/4723-RR311701%20-%20MICROWAVE%20ENGINEERING.pdf
Microwave Engineering Question Paper :
B. Tech III Year I Semester Examinations, December-2011
Time: 3 hours
Max. Marks: 80
Related : Sphoorthy Engineering College RR310405 Digital Communications B.Tech Question Paper : www.pdfquestion.in/4740.html
Answer any five questions :
All questions carry equal marks :
1.a) Write the expressions for the following and sketch their variation as a function of frequency in a rectangular waveguide.
i) Group and Phase Velocities
ii) Wave Impedances of TE and TM waves
b) Obtain the set of propagating modes in a rectangular waveguide of dimensions, 0.9inch x 0.4 inch at an operating frequency of 10.9 GHz. (1 inch = 2.54cm) [8+8]
2.a) Compute the resonant frequency of a rectangular cavity resonator with a x b x d given as 3cm x 1.5cm x 6cm. How much should be the length of the cavity with same cross sectional dimensions for the resonant frequency to be 9.36 GHz?
b) Give a brief account of the dielectric losses in a micro strip transmission line. [8+8]
3.a) Describe the functioning of a two-hole directional coupler with the help of neat schematics.
b) With suitable examples explain how an electromagnetic wave can be launched in to a waveguide through probe and loop coupling mechanisms. [8+8]
4.a) List the properties of S-parameters. Establish the scattering matrix of an E-plane Tee junction.
b) Explain how a circulator functions with the help of suitable diagrams. [10+6]
5.a) What is velocity modulation? While explaining the principle of oscillations in a reflex Klystron, derive an expression for conversion efficiency of a reflex klystron oscillator.
b) What is electronic admittance of a reflex klystron? Explain. [10+6]
6.a) Establish the Hull cut-off condition for anode voltage and magnetic field in a magnetron.
b) Discuss how a slow wave structure enables amplification of microwave signals in a TWT. [8+8]
7.a) What are transferred electron devices? List the conditions for RWH theory to be satisfied by a semi conductor material.
b) Discuss the conditions and possibility of oscillations in an IMPATT diode. [8+8]
8. With the help of suitable measurement set up explain how measurement of the following microwave quantities can be done.
a) Power b) VSWR [8+8]
RRCode No: RR311701 SET-2
1.a) Compute the resonant frequency of a rectangular cavity resonator with a x b x d given as 3cm x 1.5cm x 6cm. How much should be the length of the cavity with same cross sectional dimensions for the resonant frequency to be 9.36 GHz?
b) Give a brief account of the dielectric losses in a micro strip transmission line. [8+8]
2.a) Describe the functioning of a two-hole directional coupler with the help of neat schematics.
b) With suitable examples explain how an electromagnetic wave can be launched in to a waveguide through probe and loop coupling mechanisms. [8+8]
3.a) List the properties of S-parameters. Establish the scattering matrix of an E-plane Tee junction.
b) Explain how a circulator functions with the help of suitable diagrams. [10+6]
4.a) What is velocity modulation? While explaining the principle of oscillations in a reflex Klystron, derive an expression for conversion efficiency of a reflex klystron oscillator.
b) What is electronic admittance of a reflex klystron? Explain. [10+6]
5.a) Establish the Hull cut-off condition for anode voltage and magnetic field in a magnetron.
b) Discuss how a slow wave structure enables amplification of microwave signals in a TWT. [8+8]
6.a) What are transferred electron devices? List the conditions for RWH theory to be satisfied by a semi conductor material.
b) Discuss the conditions and possibility of oscillations in an IMPATT diode. [8+8]
7. With the help of suitable measurement set up explain how measurement of the following microwave quantities can be done.
a) Power b) VSWR [8+8]
8.a) Write the expressions for the following and sketch their variation as a function of frequency in a rectangular waveguide.
i) Group and Phase Velocities
ii) Wave Impedances of TE and TM waves
b) Obtain the set of propagating modes in a rectangular waveguide of dimensions, 0.9inch x 0.4 inch at an operating frequency of 10.9 GHz. (1 inch = 2.54cm) [8+8]