GTU Antenna And Wave Propagation - December 2014 Exam Question Paper

GTU Electronics and Communication Engineering (Semester 6)
Antenna And Wave Propagation
December 2014

Total marks: --
Total time: --

INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) Define Antenna and enlist its functions. Compare Antenna and Transmission Line.

7 M

1 (b) Define Oscillating Dipole. Derive E and H field components due to Oscillating Dipole in spherical co-ordinate systems.

7 M

2 (a) Enlist applications of reciprocity theorems to antennas. Briefly explain any two Applications.

7 M

2 (b) Briefly explain end-fire array with necessary equations.

7 M

2 (c) Write short note on typical sources of error in antenna measurement.

7 M

3 (a) Briefly explain any two antennas for special applications.

7 M

3 (b) Write short note on space wave propagation.

7 M

3 (c) Write short note on log periodic antennas.

7 M

3 (d) Explain detailed structure of Ionosphere.

7 M

4 (a) List various types of horn antennas. Briefly explain slot antenna with necessary figure.

7 M

4 (b) With neat sketches briefly explain patch antennas. Also write its applications.

7 M

4 (c) State and explain Babinets principle with example.

7 M

4 (d) With neat sketches briefly explain reflector lens antennas. Also write its Applications.

7 M

5 (a) Define the terms Antenna Temperature, Beam width, HPBW and Beam Efficiency.

7 M

5 (b) Write short note on antenna feeding methods.

7 M

5 (c) State and explain Schelkunoff theorem.

7 M

5 (d) Write short note on Cassegrain feed system with neat figure.

7 M

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