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Practical Antennas – 1 – 2

6. An antenna with very high gain and very narrow beamwidth.

(a) helical antenna
(b) discone antenna
(c) horn antenna
(d) parabolic dish antenna

ANSWER

EXPLANATION

7. What is the radiation characteristic of a dipole antenna ?

(a) omnidirectional
(b) bidirectional
(c) unidirectional
(d) hemispherical

ANSWER

EXPLANATION

8.  An antenna which is one-tenth wavelength long.

(a) hertzian dipole
(b) loop antenna
(c) marconi antenna
(d) elementary doublet

ANSWER

EXPLANATION

9. ………. is an open-ended slot antenna.

(a) helical antenna
(b) rhombic antenna
(c) notch antenna
(d) cassegrain antenna

ANSWER

EXPLANATION

10. What is the gain of isotropic antenna ?

(a) 10
(b) 1
(c) 10
(d) 100

ANSWER

EXPLANATION

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