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Name of the College : Easwari Engineering College
University : Anna University
Subject Code/Name : EC 2403- RF and Microwave Engineering
Dept : Electronics and Communication Engineering
Degree : B.E
Year/SEM: IV/VII
Website : srmeaswari.ac.in
Document Type : Question Bank

Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/srmeaswari.ac.in/3318-RF%20&%20Microwave_EC2403_QB.doc

SRM Easwari RF & Microwave Engineering Question Paper

UNIT III :
PART A :
1) What are matched terminators? May/Jun 2014.

Related : Easwari Engineering College EC2402 Optical Communication And Networking B.E Question Bank : www.pdfquestion.in/3319.html

2) What are ferrites? Why is it needed in circulators? May/Jun 2014.
3) What are the composition of ferrite? Nov/Dec 2013.
4) What is Gyrator? Nov/Dec 2013.
5) Give the significance of Rat-race junctions. May/Jun 2013.
6) Power at the input port is 900mw. If this power is incident on 20dB coupler with directivity 40dB, what is the coupled power and transmitted power. May/Jun 2013.
7) Draw the diagram of H-plane Tee junction. Nov/Dec 2012.

8) A directional coupler is having coupling factor of 20dB and directivity of 40dB. If the incident power is 100mW, what is the coupled power? Nov/Dec 2012
9) State the unity property of S-matrix. May/Jun 2012
10) What are the differences between Gyrator and phase changer? May/Jun 2012
11) Draw a structure of two hole direction coupler. Nov/Dec 2011
12) Find the resonant frequency of the TE101 mode of an air filled rectangular cavity of Dimensions 5 cm ??4 cm ??2.5 cm. Nov/Dec 2011
13) Define a reciprocal network. Nov/Dec’04
14) State the properties of scattering matrix. Nov/Dec‘04,’06
15) What should be the minimum radius of curvature of E-plane bend and H-plane bend? Validate your answer. Nov/Dec ‘04

MICROWAVE PASSIVE COMPONENTS

16) When can you say that a termination is matched to a system? Give the structure of any such termination and state the significance of that structure. Nov/Dec ‘04
17) Define coupling factor and directivity of a directional coupler. Nov/Dec 2004
18) Write down the scattering matrix of an ideal lossless transmission line of length ‘l’ units. May’05
19) Find the magnitudes of the scattering parameters for a reciprocal two-port microwave component having the VSWR as 1.4 and insertion loss as 1dB. Apr/May 2005
20) A waveguide load is used to absorb 2W of average power. The reflected power is 3mW. Find the magnitude of VSWR. Apr/May 2005
21) State phase shifting property of S-parameters. Nov/Dec’05,’06
22) State the two parameters that describe a directional coupler and define them. Nov/Dec’05
23) For a reciprocal two-port microwave component, the magnitude of scattering co-efficient is 0.091. Find its VSWR. May/June 2006
24) Obtain the coupling co-efficient in dB of directional coupler if the magnitude of its corresponding scattering parameter is 0.707 May/June 2006
25) Give the ‘K’ band frequency range. May/June 2007
26) Give the S-matrix of H-plane Tee. May/June 2007
27) What are waveguide corners, bends and twists? Nov/Dec 2007
28) Give the ‘X’ band frequency range. Nov/Dec 2007
29) What are the advantages of S-parameters over ‘Z’ or ‘Y’ parameters? Nov/Dec 2007
30) What do you mean by symmetry of scattering matrix? Apr/May 2008
31) Define Directivity of a Directional coupler. Apr/May 2008
32) What are the basic parameters to measure the performance of a directional coupler? Nov/Dec’08
33) What do you mean by Faraday rotation isolator? Nov/Dec’08
34) State the principle advantage of microwave frequencies over lower frequency. May/June ‘09
35) Write down the S-parameters of a transmission line of length ‘l’ and phase constant ‘ß’.
36) Why S parameters are used at microwave frequencies?
37) Write the S-matrix of an isolator.
38) List few applications of microwave.
39) Give the ‘Ku’ band frequency range.
40) Define insertion loss, transmission loss, and reflection loss and return loss in terms of S-parameters.

MICROWAVE COMPONENTS

UNIT III :
PART-B :
1) Draw and explain the operation of Magic Tee. Explain its application in the construction of a 4 – port circulator.(8) May/Jun 2014
2) Find the directivity in dB for a coupler if same power is applied in turn to input and output of the coupler with output terminated in each case in a matched impedance. The auxiliary output readings are 450 mW and 0.710 µW.(8) May/Jun 2014
3) Draw and explain the various types of attenuators and phase shifters. What is a gyrator? May/Jun 2014
4) Describe the following with neat sketch Nov/Dec 2013
(i) Magic Tee (8) (ii) Directional coupler. (8)
5) Explain the operation of following microwave passive devices. Nov/Dec 2013
(i) Circulator (8) (ii) Isolator. (8)
6) Explain the properties of E-plane Tee? Derive the expression of scattering matrix for directional coupler. May/Jun 2013
7) Explain the properties of magic Tee and derive scattering matrix for it. May/Jun 2013
8) State and explain the properties of S-parameters. Derive the S- parameters of a Directional Coupler.
9) (a) Explain how directional coupler can be used to measure reflected power.(8)
(b) Explain the properties of H-plane Tee and give reasons why it is called shunt Tee. (8) Nov/Dec 2012
10) (a) Derive the equation for the scattering matrix of magic Tee(8)
(b) Differentiate between the circulators and isolators.(8) Nov/Dec 2012