GTU BE 2019 Summer Question Papers || Gujarat Technological University
Subject Code: 161003
GUJARAT TECHNOLOGICAL UNIVERSITY
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SEMESTER-VI(OLD) - EXAMINATION - SUMMER 2019
Subject Name: Antenna & Wave Propagation
Time: 10:30 AM TO 01:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.1 | (a) Define (i) Directivity (ii) FNBW (iv) Radiation Resistance (v) Gain | 07 |
| (b) Give different definitions of antenna & also list out important functions of antenna. | 07 | |
| Q.2 | (a) Derive the formula of radiation resistance for dipole antenna. | 07 |
| (b) Write a short note on Antenna Radiation Pattern with necessary figure. | 07 | |
| Q.3 | (a) What is Hertzian dipole? Write the relation between a current element and an electric dipole writing suitable expressions. | 07 |
| OR | ||
| (b) Derive Friss Transmission Formula for radio link communication. | 07 | |
| Q.4 | (a) Derive the Expressions of Maxima, Minima and Half power points for Broad Side Array. | 07 |
| OR | ||
| (b) Explain Pattern Multiplication. | 07 | |
| Q.5 | (a) Explain antenna polarization in brief. | 07 |
| (b) Explain loop antenna of different shapes. | 07 | |
| Q.6 | (a) What do you mean by Antenna Synthesis? Explain Schelkunoff theorem in brief. | 07 |
| OR | ||
| (b) Explain helical antenna in detail. | 07 | |
| Q.7 | (a) What is meant by resonant-and non-resonant antenna? | 07 |
| (b) Discuss feed Methods of Microstrip Patch antenna. | 07 | |
| Q.8 | (a) Explain different types of Reflector antennas. | 07 |
| OR | ||
| (b) Explain Ground Wave Propagation in Detail. | 07 | |
| Q.9 | (a) Explain (i) Skip Distance (ii) Critical Frequency (iii) MUF | 07 |
Date: 10/05/2019
Total Marks: 70
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