VHF, UHF AND MICROWAVE ANTENNAS : Reflector Antennas : Flat Sheet and Corner Reflectors. Paraboloidal Reflectors – Geometry, characteristics, types of feeds, F/D Ratio, Spill Over, Back Lobes, Aperture Blocking, Off-set Feeds, Cassegrain Feeds.
Horn Antennas – Types, Optimum Horns, Design Characteristics of Pyramidal Horns; Lens Antennas – Geometry, Features, Dielectric Lenses and Zoning, Applications, Antenna Measurements – Patterns Required, Set Up, Distance Criterion, Directivity and Gain Measurements (Comparison, Absolute and 3-Antenna Methods).
WAVE PROPAGATION : Concepts of Propagation – frequency ranges and types of propagations. Ground Wave Propagation–Characteristics, Parameters, Wave Tilt, Flat and Spherical Earth Considerations. Sky Wave Propagation – Formation of Ionospheric Layers and their Characteristics, Mechanism of Reflection and Refraction, Critical Frequency, MUF and Skip Distance – Calculations for flat and spherical earth cases, Optimum Frequency, LUHF, Virtual Height, Ionospheric Abnormalities, Ionospheric Absorption.
Fundamental Equation for Free-Space Propagation, Basic Transmission Loss Calculations. Space Wave Propagation
– Mechanism, LOS and Radio Horizon. Tropospheric Wave Propagation – Radius of Curvature of path, Effective Earth’s Radius, Effect of Earth’s Curvature, Field Strength Calculations, M-curves and Duct Propagation, Tropospheric Scattering.
Antennas for All Applications – John D. Kraus and Ronald J. Marhefka, 3rd Edition, TMH, 2003.
Electromagnetic Waves and Radiating Systems – E.C. Jordan and K.G. Balmain, PHI, 2nd Edition, 2000.
Antenna Theory - C.A. Balanis, John Wiley and Sons, 2nd Edition, 2001.
Antennas and Wave Propagation – K.D. Prasad, Satya Prakashan, Tech India Publications, New Delhi, 2001.
Transmission and Propagation – E.V.D. Glazier and H.R.L. Lamont, The Services Text Book of Radio, vol. 5, Standard Publishers Distributors, Delhi.
Electronic and Radio Engineering – F.E. Terman, McGraw-Hill, 4th Edition, 1955.
Antennas – John D. Kraus, McGraw-Hill, 2nd Edition, 1988.
After going through this course the student will be able to
Identify basic antenna parameters.
Design and analyze wire antennas, loop antennas, reflector antennas, lens antennas, horn antennas and microstrip antennas
Quantify the fields radiated by various types of antennas
Design and analyze antenna arrays
Analyze antenna measurements to assess antenna’s performance
Identify the characteristics of radio wave propagation
III Year - I Semester
PULSE & DIGITAL CIRCUITS LAB
L T P C
0 0 3 2
Linear wave shaping.
Non Linear wave shaping – Clippers.
Non Linear wave shaping – Clampers.
Transistor as a switch.
Study of Logic Gates & Some applications.
Study of Flip-Flops & some applications.
UJT Relaxation Oscillator.
Equipment required for Laboratory: 1. RPS - 0 – 30 V
Bootstrap sweep circuit.
CRO - 0 – 20 M Hz.
Function Generators - 0 – 1 M Hz
III Year - I Semester
L IC APPLICATIONS LAB
L T P C
0 0 3 2
Minimum Twelve Experiments to be conducted :
Study of OP AMPs – IC 741, IC 555, IC 565, IC 566, IC 1496 – functioning, parameters and Specifications.
OP AMP Applications – Adder, Subtractor, Comparator Circuits.
Integrator and Differentiator Circuits using IC 741.
Active Filter Applications – LPF, HPF (first order)
Active Filter Applications – BPF, Band Reject (Wideband) and Notch Filters.
IC 741 Oscillator Circuits – Phase Shift and Wien Bridge Oscillators.
Function Generator using OP AMPs.
IC 555 Timer – Monostable Operation Circuit.
IC 555 Timer – Astable Operation Circuit.
Schmitt Trigger Circuits – using IC 741 and IC 555.
IC 565 – PLL Applications.
IC 566 – VCO Applications.
Voltage Regulator using IC 723.
Three Terminal Voltage Regulators – 7805, 7809, 7912.