Antennas and Wave Propagation (Anna University)

Brand: Technical
Product Code: AWP1
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Author : U.A.Bakshi, A.V.Bakshi
Edition : II
Number of Pages : 426
ISBN : 9789350384480

Introduction    
Physical concept of radiation in single wire, Two wire and dipole, Current distribution on a thin wire antenna.

Fundamental Parameters of Antenna    
Radiation pattern, Radiation power density, Radiation intensity, Directivity, Gain, Antenna efficiency, Beamwidth, Bandwidth, Polarization, Antenna input impedance, Elementary idea about self and mutual impedance, Radiation efficiency, Effective aperture, Antenna temperature.

Linear Wire Antennas    
Retarded potential, Infinitesimal dipole, Current distribution of short dipole and half wave dipole, Far-field, Radiating near-field and reactive near-field region, Monopole and half wave dipole.

Antenna Arrays    
Array of two point sources, Array factor, n-element linear array with uniform amplitude and spacing, Analysis of broadside array, Ordinary end-fire array, Hansen-Woodyard end fire array, n-element linear array with non-uniform spacing, Analysis of binomial and Dolph-Tchebyscheff array, Scanning array, Superdirective array.

Aperture Antennas   
Field equivalence principle, Rectangular and circular aperture antennas, Horn antenna, Babinet's principle, Slot antenna, Reflector antenna.

Ground Wave Propagation   
Friis free space equation, Reflection from earth's surface, Surface and space wave propagation for vertical and horizontal dipole, Field strength of space wave, Range of space wave propagation, Effective earth's radius, Effect of earth imperfections and atmosphere on space wave propagation, Modified refractive index, Duct propagation, Tropospheric propagation.

Ionospheric Propagation       
Structure of ionosphere, Propagation of radio waves through ionosphere, Refractive index of ionosphere, Reflection and refraction of waves by ionosphere, Critical frequency, Maximum usable frequency, Optimum working frequency, Lowest usable high frequency, Virtual height, Skip distance, Effect of earth's magnetic field.

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