EC2353 ANTENNA AND WAVE PROPAGATION

EC2353 ANTENNA AND WAVE PROPAGATION 

L T P C

3 1 0 4

UNIT I ELECTROMAGNETIC RADIATION AND ANTENNA FUNDAMENTALS

9

Review of electromagnetic theory: Vector potential, Solution of wave equation, retarded

case, Hertizian dipole. Antenna characteristics: Radiation pattern, Beam solid angle,

Directivity, Gain, Input impedance, Polarization, Bandwidth, Reciprocity, Equivalence of

Radiation patterns, Equivalence of Impedances, Effective aperture, Vector effective

length, Antenna temperature.

UNIT II WIRE ANTENNAS AND ANTENNA ARRAYS 9

Wire antennas: Short dipole, Radiation resistance and Directivity, Half wave Dipole,

Monopole, Small loop antennas. Antenna Arrays: Linear Array and Pattern Multiplication,

Two-element Array, Uniform Array, Polynomial representation, Array with non-uniform

Excitation-Binomial Array

UNIT III APERTURE ANTENNAS 9

Aperture Antennas: Magnetic Current and its fields, Uniqueness theorem, Field

equivalence principle, Duality principle, Method of Images, Pattern properties, Slot

antenna, Horn Antenna, Pyramidal Horn Antenna, Reflector Antenna-Flat reflector,

Corner Reflector, Common curved reflector shapes, Lens Antenna.

UNIT IV SPECIAL ANTENNAS AND ANTENNA MEASUREMENTS 9

Special Antennas: Long wire, V and Rhombic Antenna, Yagi-Uda Antenna, Turnstile

Antenna, Helical Antenna- Axial mode helix, Normal mode helix, Biconical Antenna, Log

periodic Dipole Array, Spiral Antenna, Microstrip Patch Antennas.

Antenna Measurements: Radiation Pattern measurement, Gain and Directivity

Measurements, Anechoic Chamber measurement.

UNIT V RADIO WAVE PROPAGATION 9

Calculation of Great Circle Distance between any two points on earth, Ground Wave

Propagation, Free-space Propagation, Ground Reflection, Surface waves, Diffraction,

Wave propagation in complex Environments, Tropospheric Propagation, Tropospheric

Scatter. Ionospheric propagation: Structure of ionosphere, Sky waves, skip distance,

Virtual height, Critical frequency, MUF, Electrical properties of ionosphere, Effects of

earth’s magnetic fields, Faraday rotation, Whistlers.

L: 45, T: 15, TOTAL= 60 PERIODS

TEXTBOOKS

1. E.C.Jordan and Balmain, “Electromagnetic waves and Radiating Systems”, Pearson

Education / PHI, 2006

2. A.R.Harish, M.Sachidanada, “Antennas and Wave propagation”, Oxford University

Press, 2007.

22

REFERENCES

1. John D.Kraus, Ronald J Marhefka and Ahmad S Khan, “Antennas for all

Applications”, Tata McGraw-Hill Book Company, 3 ed, 2007.

2. G.S.N.Raju, Antenna Wave Propagation, Pearson Education, 2004.

3. Constantine A. Balanis, Antenna Theory Analysis and Desin, John Wiley, 2nd Edition,

2007.

4. R.E.Collins, “Antenna and Radiowave propagation”,

5. W.L Stutzman and G.A. Thiele, “Antenna analysis and design”, John Wiley, 2000.