Course Details

Subject {L-T-P / C} : EC6412 : Antenna Theory with Applications in Radar { 3-0-0 / 3}

Subject Nature : Theory

Coordinator : Prof. Sudipta Maity

Syllabus

Module 1: Basic concepts - Radiation, The Hertzian dipole, Hertzian dipole polar pattern, The Hertzian dipole reconsidered Electromagnetic wave propagation and power flow - Maxwell equation basics, Plane wave propagation in space, Power flow, Antenna directivity, power gain and efficiency.
(4 hours)

Module 2: Linear dipole antennas - Dipole antenna of finite length, Current distribution on a finite-length dipole (far field effect of a sinusoidal current), Dipole antenna radiation resistance, Short dipole antenna, Gain of a half-wave dipole relative to a Hertzian dipole and power transfer.
(6 hours)

Module 3: Antenna array techniques - Radiation patterns for two antennas, One-dimensional linear arrays and far-field transformation, Two-dimensional stacked arrays, Non-uniform current excitation array, Antenna input impedance, Induced-emf method and mutual coupling, End-fire array example with mutual coupling, Dipole antennas in relation to a ground plane.
(8 hours)

Module 4: Systems and characterization considerations - Effective length of an antenna and reciprocity, Antenna aperture and the free-space link equation, Effective temperature of an antenna and noise effects, Polarization of plane electromagnetic waves, Distance to antenna far field, Clearance, Antenna characterization principles. Antenna-matching techniques - Transmission line principles, Lumped matching circuits, Reactive matching circuits, Balun matching, Power splitting - combining networks, Impedance matching and the Smith chart
(6 hours)

Module 5: Basic antenna types - Small rectangular loop antennas, Slot antennas, Yagi antennas, Rectangular microstrip patch antennas, Reflector antennas, Helical antennas, Horn antennas, Straight wire travelling-wave antennas, Planar inverted-F antennas, Dielectric resonator antennas, Reflectarray antennas, Equi-angular spiral antennas, Fractal antennas.
(6 hours)

Module 6: Application to Radar and Electronic Defense - Antenna designs for radar applications (Search Radar, Tracking Radar, Imaging Radar), Antenna design for ESM (Direction finding), Effects of antenna installation (Radome effects, antennas in proximity to other systems and objects).
(6 hours)

Course Objectives

Course Outcomes

1) Understand antenna theory and its application in Radar <br />2) Learn techniques of designing antennas for Radar applications. <br />3) Design practical antennas for Radar applications.

Essential Reading

Supplementary Reading