Antenna and Wave Propagation

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Blurb

This book is designed for the final year students in electronics and communication and for the first year post graduate students in Digital Communication and allied subjects. This compact and comprehensive text fulfils the long felt need for a suitable text book in the area of Antenna and wave Propagation . It is written as per the revised syllabus of Rajasthan Technical University (RTU), Kota. It covers the topics, of fundamentals of antenna, types of antenna, antenna arrays, radio propagation modes, with basics of IE3D software and advance antenna topics. This well organized text lays emphasis on all the modes of propagation and practical aspects of antenna, with worked out examples further previous year solved paper are included topic wise, which would be of considerable assistance to the reader. This comprehensive book covering all aspects of antenna and wave propagations, should prove to be an invaluable asset to both students professionals. Features: According to the syllabus prescribed by Rajasthan Technical University (RTU), Kota. Including previous year s university papers. Precise definitions and clear exposure of fundamental concepts. Simple and easy explanation of the topics along with well labelled diagrams. Step by step procedure is followed for explaining the topics. Detailed coverage of advance antennas, helpful for the post graduation students. The recent applications of antenna are also summarized here again proving fruitful for the M.Tech. Students. IE3D software basic is been included for the purpose of dissertation for M. Tech. Students. Ideally suitable for self study.

UNIT 1: ANTENNA FUNDAMENTALS - 1.1 Antenna Theory History; 1.2 Introduction to Antenna; 1.3 Why Do Antenna Radiates?; 1.4 Radiation Mechanism (How is Radiation Accomplished)?; 1.5 Radiation from A Small Current Element; 1.6 Radiation From A Half-Wave Dipole; 1.7 Power Radiation by a Half Wave Dipole (that is, l/2 Antenna) & its Radiation Resistance; 1.8 Types of Antennas; 1.9 Fundamentals of Antenna Theory; 1.10 Fundamentals Parameters of Antennas (1-26); 1.11 Resonant and Non-Resonant Antennas

UNIT 2: ANTENNA TYPES - 2.1 Effects of Ground on Antenna Performance; 2.2 Ground System and Antenna Losses; 2.3 Effects of Antenna Height; 2.4 Antenna Types

UNIT 3: ANTENNA ARRAYS AND MEASUREMENTS - 3.1 Antenna Arrays; 3.2 Various Forms of Antenna Arrays; 3.3 Arrays of Point Sources; 3.4 Non-isotropic but Similar Point Sources; 3.5 Multiplication of Pattern; 3.6 Binomial Arrays; 3.7 General Form of An Array; 3.8 The Array Factor; 3.9 Types of Weighting Methods; 3.10 Grating Lobes; 3.11 Uniform Phased Arrays; 3.12 Introduction To Antenna Array Geometry; 3.13 Thinned Antenna Arrays: (Linear Arrays); 3.14 Antenna Measurement

UNIT 4 : RADIO WAVE PROPAGATION - I - 4.1 Introduction; 4.2 Electromagnetic or Radio Waves; 4.3 Fundamental Equation for Free Space Propagation; 4.4 Modes of Propagation; 4.5 Structure of Atmosphere; 4.6 Characteristics of Different Ionized Regions; 4.7 Sky Wave Propagation; 4.8 Critical Frequency; 4.9 Virtual Height; 4.10 Ionosonde; 4.11 Maximum Usable Frequency (MUF); 4.12 Lowest Usable Frequency: (LUHF/LUF); 4.13 Skip-distance; 4.14 Optimum Working Frequency (OWF) (and Day And Night Frequency)

UNIT 5: RADIO WAVE PROPAGATIONS-II - 5.1 Ionospheric Abnormalities; 5.2 Ionospheric Absorption; 5.3 Multi Hop Propagations; 5.4 Space Wave Propagation; 5.5 Duct Propagation (Super Refraction)

UNIT 6: ADVANCE ANTENNA APPLICATIONS - 6.1 Antennas for Biomedical Applications; 6.2 IR Antennas-introduction; 6.3 Smart Antennas

UNIT 7: IE3D - ANTENNA DESIGNING SOFTWARE - 7A. Basic Techniques; 7B. Modelling of Wire Antennas and other Rf Antennas; 7C. Antennas Design, Radiation Patterns and EM Optimization by IE3D; 7D. Simulation of Antenna Arrays by IE3D

APPENDIX - 1. Antenna Diversity; 2. Multipath; 3. VSWR (Voltage Standing Wave Ratio); 4. Permeability; 5. Permittivity; 6. Antenna Q; 7. S-parameters; 8. Spherical Coordinates; 9. E-plane; 10. Electric Field (E-field); 11. Electric Flux Density (D-field); 12. H-plane; 13. Magnetic Field (H-field); 14. Magnetic Flux Density (B-field); 15. Maxwell's Equations; 16. Decibels (dB) - 16.1. Decibel Math; 17. Steering Vector