Department of Electronics & Communication Engineering
III.B.Tech ECE Sem-I
Sub: AWME(20A04601T)
Academic Year: 2022-23
Unit-I 2 Marks Questions
1. Define radiation resistance of an antenna.
2. Calculate the maximum effective aperture of an antenna which is operating at a wavelength
of 4 meters and has a directivity of 200.
3. Explain the mutual impedance of antenna.
4. Calculate the bandwidth of an antenna operate on a frequency of 220 MHz having Q = 140.
5. What do you meant by directivity?
6. What is the radiation pattern of a loop antenna?
7. Distinguish between field pattern and power pattern.
8. Draw the electric and magnetic fields around dipole.
9. What is the radiation resistance of a current element whose overall length is /50?
10. Explain the construction of a Yagi-Uda antenna.
11. Give the expression for retarded vector potential.
12. Compare directive gain and directivity.
13. Write short notes on polarization.
14. How to increase the radiation resistance of a loop antenna.
15. Calculate the physical height of a half wave dipole ( /2) having antenna Q of 30 and
bandwidth of 10 MHz.
16. Write a note on helical antenna and helical geometry?
17. Why a short dipole is also called an elemental dipole?
18. Explain different types of apertures.
19. Find the directivity of an antenna having radiation resistance of 72 ohms and loss resistance
of 12 ohms and a gain of 20.
20. Define an antenna.
21. Mention the radiation resistance of a folded dipole.
22. What is beam efficiency?
23. Define Hertzian dipole.
24. An antenna has a field pattern given by ( ) =
2
0° ≤ ≤ 90° . Find the HPBW.
25. Give an expression of radiation resistance of a small loop.
26. Differentiate isotropic source and non-isotropic source.
Department of Electronics & Communication Engineering
III.B.Tech ECE Sem-I
Sub: AWME(20A04601T)
Academic Year: 2022-23
Unit-II 2 Marks Questions
1. List the features of corner reflector.
2. Draw the rectangular and circular horn antennas.
3. Define the directivity of paraboloid reflector for a circular aperture.
4. Explain the uses of lens antenna.
5. What are the two modes of operation of helical antenna?.
6. What are the different ways of feeding slot antenna?
7. What are the drawbacks of lens antenna?
8. State the potential applications of helical antenna.
9. What are the types of horn antenna?.
10. Mention the uses of reflector in a reflector antenna.
11. State the important features of micro strip antennas.
12. What are the parameters to be considered for the design of a helical antenna?
13. What is the working principle of parabolic reflector antenna?.
14. What are the advantages and limitations of micro strip antennas.
15. State Fermat’s principle.
16. Draw the diagram of a pyramidal horn antenna.
17. Draw the Cassegrain feed arrangement for parabolic reflectors.
18. Mention the merits and demerits of zoned lens antennas.
19. While measuring gain of a horn antenna the gain of the oscillator was set for 9.00 GHz
and the attenuation inserted was found to be 9.8 dB. Calculate the gain of the horn. The
distance between the two horns was 35 cm.
Department of Electronics & Communication Engineering
III.B.Tech ECE Sem-I
Sub: AWME (20A04601T)
Academic Year: 2022-23
Unit-III 2 Marks Questions
1. Explain the pattern multiplication.
2. Write shot notes on effect of earth on the radiation pattern.
3. Draw the structure of medium above earth surface and indicate each layer.
4. Define critical frequency.
5. What is linear array?
6. What is tropospheric scatter propagation?
7. Give the relationship between virtual height and skip distance.
8. Differentiate broadside and end fire array.
9. What is a End fire array?
10. What are the conditions to obtain end fire array pattern?
11. Why do we go for antenna arrays?
12. Define skip distance and MUF.
13. What is sporadic E layer in Ionosphere.
14. What is array factor?
15. Draw the structure of ionosphere.
16. Find the range of LOS (Line of Sight) system when they receiver and transmitter antenna
heights are 10 m and 100 m respectively.
17. What is the need for the binomial array?
18. What is point source?
19. What are the factors that affect the propagation of radio waves.
20. What is meant by uniform linear array?
21. What are the types of fading?
22. What is wave tilt?
23. Mention different modes of wave propagation.
24. Define array factor.
25. Estimate the surface wave tilt in degrees over an earth of 12 mm conductivity and relative
permittivity 20 at a wave length of 300 m.
SREE VENKATESWARA COLLEGE OF ENGINEERING
NAAC ‘A’ Grade Accredited Institution,
An ISO 9001:: 2015 Certified Institution
(Approved by AICTE, New Delhi and Affiliated to JNTU,Anantapur)
Northrajupalem (Vi), Kodavaluru(M) , S.P.S.R Nellore (Dt)-524316
Dept. of Electronics and Communication Engineering
Course: ANTENNAS & MICROWAVE ENGINEERING (III B.Tech, II Sem) AY:: 2022-23
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SREE VENKATESWARA COLLEGE OF ENGINEERING
NAAC ‘A’ Grade Accredited Institution,
An ISO 9001:: 2015 Certified Institution
(Approved by AICTE, New Delhi and Affiliated to JNTU,Anantapur)
Northrajupalem (Vi), Kodavaluru(M) , S.P.S.R Nellore (Dt)-524316
SREE VENKATESWARA COLLEGE OF ENGINEERING
NAAC ‘A’ Grade Accredited Institution,
An ISO 9001:: 2015 Certified Institution
(Approved by AICTE, New Delhi and Affiliated to JNTU,Anantapur)
Northrajupalem (Vi), Kodavaluru(M) , S.P.S.R Nellore (Dt)-524316
SREE VENKATESWARA COLLEGE OF ENGINEERING
NAAC ‘A’ Grade Accredited Institution,
An ISO 9001:: 2015 Certified Institution
(Approved by AICTE, New Delhi and Affiliated to JNTU,Anantapur)
Northrajupalem (Vi), Kodavaluru(M) , S.P.S.R Nellore (Dt)-524316
SREE VENKATESWARA COLLEGE OF ENGINEERING
NAAC ‘A’ Grade Accredited Institution,
An ISO 9001:: 2015 Certified Institution
(Approved by AICTE, New Delhi and Affiliated to JNTU,Anantapur)
Northrajupalem (Vi), Kodavaluru(M) , S.P.S.R Nellore (Dt)-524316
SREE VENKATESWARA COLLEGE OF ENGINEERING
NAAC ‘A’ Grade Accredited Institution,
An ISO 9001:: 2015 Certified Institution
(Approved by AICTE, New Delhi and Affiliated to JNTU,Anantapur)
Northrajupalem (Vi), Kodavaluru(M) , S.P.S.R Nellore (Dt)-524316