1
GATE ECE 2002
MCQ (Single Correct Answer)
+2
-0.6
A person with a receiver is 5 Km away from the transmitter. What is the distance that this person must move further to detect a 3-dB decrease in signal strength?
A
942 m
B
2070 m
C
4978 m
D
5320 m
2
GATE ECE 2001
MCQ (Single Correct Answer)
+2
-0.6
A medium wave radio transmitter operating at a wavelength of 492 m has a tower antenna of height 124m. What is the radiation resistance of the antenna?
A
25 $$\Omega $$
B
36.5 $$\Omega $$
C
50 $$\Omega $$
D
73 $$\Omega $$
3
GATE ECE 2001
MCQ (Single Correct Answer)
+2
-0.6
In a uniform linear array, four isotropic radiating elements are spaced $$\lambda /4$$ apart. The progressive phase shift between the elements required for forming the main beam at 60° off the end-fire is
A
$$ - \pi \,\,rad$$
B
$$ - \pi /2\,\,rad$$
C
$$ - \pi /4\,\,rad$$
D
$$ - \pi /8\,\,rad$$
4
GATE ECE 2000
MCQ (Single Correct Answer)
+2
-0.6
For an 8 feet (2.4 m) parabolic disk antenna operating at 4 GHz, the minimum distance required for far field measurement is closest to
A
7.5 cm
B
15 cm
C
15 m
D
150 m
GATE ECE Subjects
Signals and Systems
Network Theory
Control Systems
Digital Circuits
General Aptitude
Electronic Devices and VLSI
Analog Circuits
Engineering Mathematics
Microprocessors
Communications
Electromagnetics