Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (ECE)-Electronics And Communications Engineering 2020 December 4th Sem 57595 Electromagnetics And Antennas Previous Question Paper
Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (ECE/Electronics Engg) (2012 to 2017)
(Sem.?4)
ELECTROMAGNETICS AND ANTENNAS
Subject Code : BTEC-403
M.Code : 57595
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Answer briefly :
1)
Calculate the radiation resistance of /10 wire dipole in free space?
2)
Define Antenna beam width.
3)
What are the disadvantages of ground wave propagation?
4)
What is retarded potential?
5)
State field equivalence principle.
6)
Define Surface Impedance.
7)
Differentiate between TE, TM and TEM mode.
8)
What is Distortion Less line?
9)
Define Polarization.
10) What are smith charts? Briefly explain.
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SECTION-B
11) What is aperture antenna? Explain its different types.
12) Explain the working of parabolic reflector antenna.
13) Explain Duct Propagation in detail.
14) A rectangular waveguide with dimensions 4cm ? 2cm operates at 10 GHz. Find fc and c
of TE10 mode.
15) Discuss the wave propagation characteristics in good dielectric.
SECTION-C
16) Explain the concept of radiation in single wire, two wire and dipole antenna.
17) For an array of n isotropic point sources radiating in end fire array, derive and obtain the
maxima and minima direction for major and minor lobes. Sketch the pattern.
18) Give the transmission line analogy for waveguides. Also draw the equivalent
transmission line circuit representation for TE and TM waves.
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 13 February 2021