UNIT 2 : ANTENNAS


 UNIT 2 

ANTENNAS


SHORT ANSWER QUESTIONS :

1) State the parameters of antenna ?

2) Define iso-tropic antenna ?

3) Radiation pattern of antenna ?

4) Half wave dipole radiation pattern?

5) Classify antenna based on frequency, radiation, application , construction?

6) State different microwave antennas ?

7) Different horn antenna types ? application of horn antenna ?

8) Need for folded dipole?

9) Difference between end fire & broad side array?

10) Functions of 1)driven element 2)parasitic element 3) reflectors 3)directors

11) Different types of antenna arrays ?


ESSAY QUESTIONS :

1) a) Need for antenna array?

    b) Explain end-fire and broadside array ?

2) Working principal of Dish antenna & applications 

3) Working principal of Horn antenna?advantages and disadvantages ?

4) Explain Radiation mechanism of antenna from transmission line theory ?(single wire , two wire)

5) Describe the functions of dipole , folded dipole antenna? Give their applications?

6) Define i ) antenna input  impedance      ix) radiation resistance

                ii) antenna band width                x) antenna beam efficiency

                iii) radiation pattern                    xi) antenna efficiency

                iv) front to back ratio                 xii) antenna aperture

                v)  radiation intensity                 xiii) antenna polarization

                vi)    directive gain

                vii)   directivity

                viii)  power gain


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