Antenna & Propagation for GTU 18 Course (VI- Elex./ECE - 3161003)

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1. Basic Antenna Concepts : Definition and functions of an antenna, Comparison between an antenna and transmission line, Radio communication link with transmitting antenna and a receiving antenna, Radiation patterns of antennas-field and power patterns, All antenna types. (Chapter - 1) 2. Radiation of Electric Dipole : Potential functions and the electromagnetic field, Oscillating electric dipole-derivations for E and H field components in spherical co-ordinate systems, Power radiated by a current element, Application to antennas, Radiation from quarter wave monopole and half wave dipoles, Derivation for radiation resistance, Application of reciprocity theorem to antennas, Equality of directional patterns and effective lengths of transmitting and receiving antennas, Directional properties of dipole antennas, Antenna feeding methods. (Chapter - 2) 3. Antenna Parameters and Definitions : Beam area, Beam width-Half-Power Beam width (HPBW) and First Null Beam width (FNBW), Polarization, Radiation intensity, Beam efficiency, Directivity and directive gain, Radiation resistance, Radiation efficiency, Resolution, Antenna aperture - physical and effective apertures, Effective height, Transmission formula, Antenna field zones, Transmission loss as a function of frequency. Antenna temperature and signal to noise ratio. (Chapter - 3) 4. Arrays of Point Sources : Expression for electric fields from two, Three and N element arrays - linear arrays : Broad-side array and End-fire array-Method of pattern multiplication-Binomial array-Horizontal and Vertical Antennas above the ground plane, Effect of ground on ungrounded antenna, Schelkunoff theorems for linear arrays, Dolph-Tchebysheff distribution for linear arrays. (Chapter - 4) 5. Loop Antenna : Small loop short magnetic dipole, Comparison of far field of small loop and short dipole loop antennas, Field pattern of circular loop antenna and radiation resistance of loop antenna, Directivity of circular loop antennas with uniform c

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Pages: 588 Edition: 2024 Vendors: Technical Publications