Download GTU BE/B.Tech 2019 Winter 6th Sem Old 161003 Antenna And Wave Propagation Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 6th Sem Old 161003 Antenna And Wave Propagation Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? VI (Old) EXAMINATION ? WINTER 2019
Subject Code: 161003 Date: 04/12/2019

Subject Name: Antenna & Wave Propagation

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) Define (i) Directivity (ii) HPBW (iii) FNBW (iv) Radiation Resistance
(v) Radiation intensity (vi) Gain (vii) Beam area.
07
(b) Write a detail note on types of antenna with necessary diagrams. 07

Q.2 (a) Discuss feeding Methods of Dipole. 07
(b) Write a short note on Antenna Radiation Pattern with necessary figure. 07
OR
(b) Derive Friss Transmission formula. 07

Q.3 (a) Explain Antenna Field zones. 07
(b) Derive the Expressions of Maxima, Minima and Half power points for End fire
array.
07
OR
Q.3 (a) Derive the Expressions of Maxima, Minima and Half power points for Broad side
array.
07
(b) Explain principle of Pattern Multiplication. 07

Q.4 (a) What do you mean by Antenna Synthesis? Explain Schelkunoff theorem in brief. 07
(b) Write a short note on Loop antenna. 07
OR
Q.4 (a) Discuss two Modes of Helical antenna. Enlist the design step for any one mode
with the help of necessary formula.
07
(b) Explain Yagi Uda antenna in detail. 07

Q.5 (a) Explain different types of Reflector antennas. 07
(b) Explain Babibet?s principal for slot antenna. 07
OR

Q.5 (a) Explain different Modes of Propagation with its Practical significance. 07
(b) Explain (i) Skip Distance (ii) Critical Frequency (iii) MUF 07

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