Microwave Communication Systems – 1 – 2

6. The free space attenuation between two microwave antennas 40 km apart operating at 8 GHz is :

(a) 146.7 dB
(b) 142.55 dB
(c) 82.5 dB
(d) 
86.7 dB

ANSWER

EXPLANATION

7. If the correction factor k equals 4/3 of the earth’s curvature, the microwave beam would have a curvature that is …………… than that of the earth.

(a) more
(b) less
(c) equal
(d)
 not related

ANSWER

EXPLANATION

8. Microwaves link repeaters are typically 50 km apart :

(a) Because of atmospheric attenuation
(b) Because of earth’s curvature
(c) Because of output tube power limitations
(d) 
None of these

ANSWER

EXPLANATION

9. When microwave, signals follow the curvature of the earth, this is known as :

(a) The Faraday effect
(b) Ducting
(c) Tropospheric scatter
(d) 
Ionospheric reflection

ANSWER

EXPLANATION

10. Which of the following antenna is best excited from a waveguide :

(a) Horn
(b) Discone
(c) Helical
(d) 
Biconical

ANSWER

EXPLANATION

1 2 3

Be a Part of The New & Next

MCQs fb  MCQs G+

Share the Knowledge

Shares
Copy Protected by Chetan's WP-Copyprotect.