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Default Sathyabama Institute of Science and Technology BE ECE SECA1504 Antennas and Wave Propagation Syllabus

Sathyabama Institute of Science and Technology BE ECE SECA1504 Antennas and Wave Propagation Syllabus

SATHYABAMA INSTITUTE OF SCIENCE AND TECHNOLOGY SCHOOL OF ELECTRICAL AND ELECTRONICS

SECA1504 ANTENNAS AND WAVE PROPAGATION
L T P Credits Total Marks
3 * 0 3 100

UNIT 1 ANTENNA FUNDAMENTALS AND WIRE ANTENNAS 9 Hrs.
Basic Antenna elements-properties of antenna-Isotropic radiator- Antenna parameters(definition only): Radiation Intensity,
Radiation pattern, Gain and Directivity, FBR, Effective Length, Effective Aperture, Radiation Resistance, Antenna Terminal
(self and mutual) Impedance, Polarization, Beam width, Bandwidth, Antenna temperature, Friis transmission formula. Wire
Antennas: Retarded Potentials, Short Electric Dipole, Radiation from an alternating current element, Half wave Dipole,
quarter wave monopole - Fields, Power radiated and Radiation Resistance.

UNIT 2 ANTENNA ARRAYS 9 Hrs.
Types of arrays - Broad side, End fire, Collinear, Parasitic arrays.-Arrays of two point sources. N element of uniform linear
arrays –Array of N elements with equal spacing and currents equal in magnitude and spacing (broad side array)- Array of N
elements with equal spacing and currents equal in magnitude but with progressive phase shift(end fire array)-Hansenwoodyard
array -Pattern Multiplication - Binomial arrays.

UNIT 3 TRAVELLING WAVE AND BROADBAND ANTENNAS 9 Hrs.
Effect of ground on ungrounded antenna-Methods of excitation-Travelling wave radiators: basic concepts, Long wire
antennas-field strength calculations and patterns- V-antennas, Rhombic Antennas, Small Loop antennas- Concept of short
magnetic dipole, Helical Antennas, Folded Dipole Yagi-Uda Arrays, Log periodic antennas. Reflector Antennas: Huygens’
principle-Flat Sheet and Corner Reflectors, Paraboloidal Reflectors, Cassegrain Feeds. Slot antennas-Babinets principle,
Horn antennas, Lens antennas, Microstrip antennas.

UNIT 4 PROPOGATION 9 Hrs.
Factors involved in the propagation of Radio Waves- Ground wave propogation, Structure of Ionosphere and its effects on
radio waves- Refraction and Reflection of sky wave by the ionosphere, Ray paths-Measures of Ionosphere propagation:
critical frequency, skip distance, virtual height, Maximum usable frequency, Fading of signals: Selective fading - Diversity
reception, Space wave propagation-Considerations in space wave propagation, Atmospheric effects in space wave
propagation, Super Refraction - Duct Wave Propagation.

UNIT 5 ANTENNA MEASUREMENT 9 Hrs.
Anechoic Chamber-Radiation Pattern Measurement-Gain measurement-Beamwidth and Directivity Measurement-
Impedance Measurement - Measurement of radiation efficiency- Ionospheric measurements - Vertical incidence
measurements of the ionosphere - Relation between oblique and vertical incidence transmission - System Issues – antenna
noise.
Max. 45 Hrs.

COURSE OUTCOMES
On completion of the course, student will be able to
CO1 - Define the antenna basic parameters.
CO2 - Explain the radiation mechanism from the dipole elements.
CO3 - Classify antenna arrays and infer their significance.
CO4 - Analyze the characteristics of low and high frequency antennas.
CO5 - Compare the properties and measures of various radio wave propagation.
CO6 - Perform antenna measurements and analyze the parameters and develop the basic skills for designing practical
antennas.

TEXT / REFERENCE BOOKS
1. K.D.Prasad, “Antennas and Wave Propagation”, 3rd Edition, Satya Prakasan, New Delhi,2003.
2. R.L. Yadava, “Antennas and Wave Propagation”, 2nd Edition, PHI Learning Private Limited, New Delhi,2011.
3. Balanis, C.A., “Antenna Theory and Design”, 4th Edition, John Wiley and Sons, 2016.
4. Jordan, E.C. and Balmain, K.G., “Electromagnetic Waves and Radiating Systems”, 2nd Edition, Prentice Hall of India,
2006.
5. Collin, R.E., “Antennas and Radio Wave Propagation”, McGraw Hill, 1985.

END SEMESTER EXAMINATION QUESTION PAPER PATTERN
Max. Marks: 100 Exam Duration: 3 Hrs.
PART A: 10 Questions of 2 marks each – No choice 20 Marks
PART B: 2 Questions from each unit of internal choice; each carrying 16 marks 80 Marks
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