17-11-2012, 06:19 PM
DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING QUESTION BANK
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PART – A( 2 Marks)
1. Define a Hertzian dipole?
2. Draw the radiation pattern of a horizontal dipole?
What do you mean by induction field and radiation field?
3. What is magnetic vector Potential?
4. Define scalar Potential?
5. What is Retarded Current?
6. Write down the expression for magnetic vector Potential using three standard current
distributions?
7. Define top loading?
8. What is a capacitance hat?
9. What is quarter wave monopole?
10. Write down the expression for radiated fields of a half wave dipole antenna?
11. What is the effective aperture and directivity of a half wave dipole?
12. What is the effective aperture and directivity of a Hertzian dipole antenna?
13. Write down the expression for radiation resistance of a Hertzian dipole?
14. Define retardation time?
15. What is radiation resistance of a half wave dipole?
16. Compare electric scalar potential and magnetic vector potential?
PART – B
1. Derive the expression for the radiated field from a short dipole?
2. Starting from first principles obtain the expression for the power
radiated by a half wave dipole?
3. Derive the expression for power radiated and find the radiation
resistance of a half wave dipole?
4. Derive the radian resistance, Directivity and effective aperture of a
half wave dipole?
5. Derive the fields radiated from a quarter wave monopole antenna?
6. Find the radiation resistance of elementary dipole with linear
current distribution?
7. Derive the radian resistance, Directivity and effective
aperture of a hertzian dipole?
[attachment=40095]
PART – A( 2 Marks)
1. Define a Hertzian dipole?
2. Draw the radiation pattern of a horizontal dipole?
What do you mean by induction field and radiation field?
3. What is magnetic vector Potential?
4. Define scalar Potential?
5. What is Retarded Current?
6. Write down the expression for magnetic vector Potential using three standard current
distributions?
7. Define top loading?
8. What is a capacitance hat?
9. What is quarter wave monopole?
10. Write down the expression for radiated fields of a half wave dipole antenna?
11. What is the effective aperture and directivity of a half wave dipole?
12. What is the effective aperture and directivity of a Hertzian dipole antenna?
13. Write down the expression for radiation resistance of a Hertzian dipole?
14. Define retardation time?
15. What is radiation resistance of a half wave dipole?
16. Compare electric scalar potential and magnetic vector potential?
PART – B
1. Derive the expression for the radiated field from a short dipole?
2. Starting from first principles obtain the expression for the power
radiated by a half wave dipole?
3. Derive the expression for power radiated and find the radiation
resistance of a half wave dipole?
4. Derive the radian resistance, Directivity and effective aperture of a
half wave dipole?
5. Derive the fields radiated from a quarter wave monopole antenna?
6. Find the radiation resistance of elementary dipole with linear
current distribution?
7. Derive the radian resistance, Directivity and effective
aperture of a hertzian dipole?