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Electromagnetics
Waveguides
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Antennas
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Miscellaneous
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Transmission Lines
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Maxwell Equations
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Uniform Plane Waves
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1
GATE ECE 2004
MCQ (Single Correct Answer)
+1
-0.3
Consider a lossless antenna with a directive gain of + 6 dB. If 1 m W of power is fed to it the total power radiated by the antenna will be
A
4 m W
B
1 m W
C
7 m W
D
1/4 m W
2
GATE ECE 2002
MCQ (Single Correct Answer)
+1
-0.3
The line-of-sight communication requires the transmit and receive antennas to face each other. If the transmit antenna is vertically polarized for best reception the receiver antenna should be
A
horizontally polarized
B
vertically polarized
C
at $${45^ \circ }$$ with respect to horizontal polarization
D
at $${45^ \circ }$$ with respect to vertical polarization
3
GATE ECE 2000
MCQ (Single Correct Answer)
+1
-0.3
If the diameter of a $$\lambda /2$$ dipole antenna is increased from $$\lambda /100$$ to $$\lambda /50$$ then is
A
bandwidth increases
B
bandwidth decreases
C
gain increases
D
gain decreases
4
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
An antenna in free space receives 2$$\mu $$ W of power when the incident electric field is 20 m V/m rms. The effective aperture of the antenna is
A
0.005 $${m^2}$$
B
0.05 $${m^2}$$
C
1.885 $${m^2}$$
D
3.77 $${m^2}$$
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Questions Asked from Marks 1
GATE ECE 2015 Set 3 (1) GATE ECE 2014 Set 4 (2) GATE ECE 2012 (1) GATE ECE 2008 (1) GATE ECE 2006 (1) GATE ECE 2005 (1) GATE ECE 2004 (1) GATE ECE 2002 (1) GATE ECE 2000 (1) GATE ECE 1998 (4) GATE ECE 1995 (1) GATE ECE 1994 (1)
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