Scribd
Upload
360 views2 pages

Antennas and Wave Propagation

The document outlines the course objectives and outcomes of a course on antennas and wave propagation. The course aims to teach the applications of electromagnetic waves in free space and enable students to design different types of antennas by applying fundamentals. It is divided into five units that cover topics such as radiation fields of wire antennas, antenna fundamentals and arrays, loop and helical antennas, traveling wave antennas, aperture and lens antennas, and propagation through sky waves, space waves and ground waves.

Uploaded by

kiveti
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
360 views2 pages

Antennas and Wave Propagation

The document outlines the course objectives and outcomes of a course on antennas and wave propagation. The course aims to teach the applications of electromagnetic waves in free space and enable students to design different types of antennas by applying fundamentals. It is divided into five units that cover topics such as radiation fields of wire antennas, antenna fundamentals and arrays, loop and helical antennas, traveling wave antennas, aperture and lens antennas, and propagation through sky waves, space waves and ground waves.

Uploaded by

kiveti
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 2

11EC211 ANTENNAS AND WAVE PROPAGATION

Credits 3:1:0
Course Objective
To understand the applications of the electromagnetic waves in free space.
Course Outcome
The students will be able to apply the fundamentals to design different types of antennas.
Unit I
Radiation Fields of Wire Antennas: Concept of Vector Potential-Modification of time varying
retarded case. Fields associated with Hertizian dipole-Radiation power, Resistance and Gain of
current element- Radiation resistance of elementary dipole with linear current distributionRadiation from half wave dipole and quarter wave monopole-Assumed current distribution for
wire antennas-Use of Capacitance hat and loading coil for short antennas
Unit II
Antenna Fundamentals and Antenna Arrays: Definitions: Radiation Intensity-Directive
Gain-Directivity-Power gain-Beam width-Band width. Radiation resistance - Gain of half wave
dipole - Folded dipole-Reciprocity principle-Effective length and effective area - Relation
between gain effective length and radiation resistance
Loop Antennas: Radiation from small loop and its radiation resistance- Radiation from loop
with circumference equal to wavelength and resultant circular polarization on axis
Helical Antennas: Normal and axial mode of operation
Antenna Arrays: Expression for electric field from two or three element arrays-Uniform linear
array-Method of Pattern multiplication-Binomial array-Image method
Unit III
Travelling Wave Antennas: Radiation from a Traveling wave on a wire
Rhombic Antenna: Analysis and design
Coupled Antennas: Self and mutual impedence-2 and 3 element Yagi antennas-Log periodic
antennas-feeding and transposing of lines- effects of decreasing .
Unit IV
Aperture and Lens Antennas: Radiation from Huygens source- Radiation from the open end
of a coaxial line- Radiation from a rectangular aperture treated as an array of Huygens sourceEquivalence of fields of Slot and complementary dipole- Relation between dipole and slot
impedances. Feeding of slot antennas-Thin slot in an infinite cylinder-Field on E plane hornRadiation from circular aperture-Beam width and effective area Reflector antennas-Lens
antennas-Spherical waves and Biconical antennas
Unit V
Propagation: Sky wave propagation: Structure of Ionosphere-Effective dielectric constant of
ionized region-Refraction-Refractive index-Critical frequency-Skip distance-Effect of earths
magnetic field-collisions-Max usable frequency-Fading-diversity reception
Space wave propagation: Reflection of polarized waves-Reflection characteristics of earthResultant of direct and reflected wave at the receiver-Duct propagation
Ground wave propagation: Attenuation characteristics-Calculation of field strength

Text Books
1. John D Kraus and Ronalatory Marhefka Antennas Tata Mc Graw Hill 2002
2. Jordan and Balmain, Electromagnetic waves and radiating systems, PHI, 1968,
Reprint 2003
Reference Books
1. R.E. Collins Antennas and Radio wave propagation Mc Graw Hill 1987
2. Balanis, C.S Antenna Theory Analysis and Design John Wiley & Sons, II Edition
2003.

You might also like