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1
GATE ECE 1998
MCQ (Single Correct Answer)
+1
-0.3
The vector $$\mathop H\limits^ \to $$ in the far field of an antenna satisfiels
A
$$\nabla .\,\mathop H\limits^ \to = 0\,\,and\,\,\nabla \times \,\mathop H\limits^ \to = 0\,$$
B
$$\nabla .\,\mathop H\limits^ \to \ne 0\,\,and\,\,\nabla \times \,\mathop H\limits^ \to \ne 0$$
C
$$\nabla .\,\mathop H\limits^ \to = 0\,\,and\,\,\nabla \times \,\mathop H\limits^ \to \ne 0\,\,$$
D
$$\nabla .\,\mathop H\limits^ \to \ne 0\,\,and\,\,\nabla \times \,\mathop H\limits^ \to = 0\,\,$$
2
GATE ECE 1995
MCQ (Single Correct Answer)
+1
-0.3
An antenna when radiating, has a highly directional radiation pattern. When the antenna is receiving its radiation pattern
A
is more directive
B
is less directive
C
is the same
D
exhibits no directivity at all
3
GATE ECE 1994
MCQ (Single Correct Answer)
+1
-0.3
For a dipole antenna
A
the radiation intensity is maximum along the normal to the dipole axis
B
the current distribution along its length is uniform irrespective of the length
C
the effective length equals its physical length
D
the input impedance is independent of the location of the feed-point
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Analog Communication Systems Digital Communication Systems Random Signals and Noise Fundamentals of Information Theory Noise In Digital Communication
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Waveguides Antennas Miscellaneous Transmission Lines Maxwell Equations Uniform Plane Waves
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