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1
GATE ECE 1997
MCQ (Single Correct Answer)
+2
-0.6
A parabolic dish antenna has a conical beam 20 wide. The directivity of the antenna is approximately
A
20 dB
B
30 dB
C
40 dB
D
50 dB
2
GATE ECE 1996
MCQ (Single Correct Answer)
+2
-0.6
A transverse electromagnetic wave with circular polarization is received by a dipole antenna. Due to polarization mismatch, the power transfer efficiency from the wave to the antenna is reduced to about
A
50%
B
35.3%
C
25%
D
05
3
GATE ECE 1996
MCQ (Single Correct Answer)
+2
-0.6
A 1 km long microwave link uses two antennas each having 30dB gain. If the power transmitted by one antenna is 1 W at 3 GHz, the power received by the other antenna is approximately
A
98.6 $$\mu $$ W
B
76.8 $$\mu $$ W
C
63.4 $$\mu $$ W
D
55.2 $$\mu $$ W
4
GATE ECE 1992
MCQ (Single Correct Answer)
+2
-0.6
Two dissimilar antennas having their maximum directivities equal
A
must have their beamwidths also equal
B
cannot have their beamwidths equal because they are dissimilar antennas
C
may not necessarily have their maximum power gains equal
D
must have their effective aperture areas (capture areas) also equal.
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GATE ECE Subjects
Signals and Systems
Representation of Continuous Time Signal Fourier Series Fourier Transform Continuous Time Signal Laplace Transform Discrete Time Signal Fourier Series Fourier Transform Discrete Fourier Transform and Fast Fourier Transform Discrete Time Signal Z Transform Continuous Time Linear Invariant System Discrete Time Linear Time Invariant Systems Transmission of Signal Through Continuous Time LTI Systems Sampling Transmission of Signal Through Discrete Time Lti Systems Miscellaneous
Network Theory
State Equations For Networks Network Elements Network Theorems Two Port Networks Transient Response Sinusoidal Steady State Response Network Graphs Miscellaneous
Control Systems
Basic of Control Systems Signal Flow Graph and Block Diagram Time Response Analysis Stability Root Locus Diagram Frequency Response Analysis Compensators State Space Analysis
Digital Circuits
Number System and Code Convertions Boolean Algebra Logic Gates Combinational Circuits Sequential Circuits Semiconductor Memories Logic Families Analog to Digital and Digital to Analog Converters
General Aptitude
Numerical Ability Verbal Ability
Electronic Devices and VLSI
Semiconductor Physics PN Junction BJT and FET IC Basics and MOSFET
Analog Circuits
Bipolar Junction Transistor FET and MOSFET Oscillators Operational Amplifier 555 Timer Frequency Response Diodes Feedback Amplifier Power Amplifier
Engineering Mathematics
Linear Algebra Calculus Vector Calculus Complex Variable Probability and Statistics Differential Equations Numerical Methods Transform Theory
Microprocessors
Pin Details of 8085 and Interfacing with 8085 Instruction Set and Programming with 8085
Communications
Analog Communication Systems Digital Communication Systems Random Signals and Noise Fundamentals of Information Theory Noise In Digital Communication
Electromagnetics
Waveguides Antennas Miscellaneous Transmission Lines Maxwell Equations Uniform Plane Waves
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