1

GATE ECE 2015 Set 3

MCQ (Single Correct Answer)

+1

-0.3

The directivity of an antenna array can be increased by adding more antenna elements, as a larger number of elements

2

GATE ECE 2014 Set 4

Numerical

+1

-0

For an antenna radiating in free space, the electric field at a distance of 1 km is found to be 12 m V/m. Given that intrinsic impedance of the free space is 120$$\pi \Omega $$, the magnitude of average power density due to this antenna at a ditance of 2 km from the antenna (in n W/$${m^2}$$) is

Your input ____

3

GATE ECE 2014 Set 4

MCQ (Single Correct Answer)

+1

-0.3

Match column A with column B.

** Column **

1. Point electromagnetic source

2. Dish antenna

3. Yagi-Uda antenna

** Column **

P. Highly directional

Q. End fire

R. Isotropic

4

GATE ECE 2012

MCQ (Single Correct Answer)

+1

-0.3

The radiation pattern of an antenna in spherical co-ordinates is given by
$$$F\,(\theta )\, = {\cos ^4}\,\theta \,\,\,;\,\,0\,\, \le \,\,\theta \,\, \le \,\,\pi /2$$$
The directivity of the antenna is

Questions Asked from Antennas (Marks 1)

Number in Brackets after Paper Indicates No. of Questions

GATE ECE Subjects

Signals and Systems

Representation of Continuous Time Signal Fourier Series
Discrete Time Signal Fourier Series Fourier Transform
Discrete Time Signal Z Transform
Continuous Time Linear Invariant System
Transmission of Signal Through Continuous Time LTI Systems
Discrete Time Linear Time Invariant Systems
Sampling
Continuous Time Signal Laplace Transform
Discrete Fourier Transform and Fast Fourier Transform
Transmission of Signal Through Discrete Time Lti Systems
Miscellaneous
Fourier Transform

Network Theory

Control Systems

Digital Circuits

General Aptitude

Electronic Devices and VLSI

Analog Circuits

Engineering Mathematics

Microprocessors

Communications

Electromagnetics