Dr. A.P.J. Abdul Kalam University
Bachelor of Engineering
Sixth Semester Examination, June-2021
Antenna & Wave Propagation [EC604]
Branch: EC
Time: 3:00 Hrs Max Marks 70
Note: 1. Attempt any five questions out of eight.
2. All question carry equal marks.
Q.1 (a) What are different directional characteristic of dipole antenna.
(b)With the help of diagram explain the important features of different types of
space wave propagation of electromagnetic waves over long distance even
beyond the horizon.
Q.2 (a)Explain the radiation from a travelling wave on a wire.
(b)Derive the relation for magnetic and electric field components of an
alternating current elements.
Q.3 (a) What do you mean by horn antenna? Explain in detail.
(b) Explain Dolph-Chebyshev method of antenna array synthesis.
Q.4 (a) Explain traveling wave antenna in detail.
(b) Derive an expression for the power radiated by quarter wave monopole.
Q.5 (a) If the array factor of a line array has zero at
and the
elements are spaced at UA. Design the array.
(b) What do you mean by Ground Wave Propagation?
Q.6 (a) Write a short note on effect of earth on vertical patterns.
(b) Write a detail description on planer array.
Q.7 Discuss the significance of
(i) Retarded Potential
(ii) Radiation resistance
Q.8 Define the following.
(i) Effective length of transmitting and receiving antenna
(ii) Virtual height
(iii) Skip distance
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