EC2353 Antennas And Wave Propagation Scanned Lecture Notes (All Units) Deepak Edition

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    04-02-2015, 05:27 PM #1
       
    Anna University , Chennai
    Department of B.E-Electronics and Communication Engg
    Sixth Semester
    EC2353 Antennas And Wave Propagation
    Scanned Lecture Notes - Deepak Edition
    (Regulation 2008)

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    Content :
    ANTENNA AND WAVE PROPAGATION

    UNIT-1

    ELECTROMAGNETIC RADIATION AND ANTENNA FUNDAMENTALS
    Half power beam width
    Directivity
    Effective aperture
    Gain and its significance
    Reciprocity theorem
    Vector potential
    Wave equation
    Electric and magnetic field components
    Hertzian dipole
    Lorentz wave equation
    Solution of the vector wave equation
    Radiation pattern
    Normalized power pattern
    Polarization
    1. Linear polarization
    2. Circular polarization
    3. Elliptical polarization
    Parameters in polarization
    1. Reference angle
    2. Tilt angle
    3. Built-in angle
    4. Cross whole leakage

    UNIT-2

    WIRE ANTENNA AND ANTENNA ARRAYS
    Pattern multiplication
    End fire array pattern
    Application of loop antenna
    Antenna field zone
    Uniform and collinear array
    Broad-side array
    1. Pattern maxima
    2. Pattern minima
    3. Beam width of major lobe
    End fire array
    Half wave length dipole
    Radiation pattern for half wave dipole
    1. Maxima direction
    2. Minima direction

    UNIT-3

    APERTURE ANTENNAS
    Huygen’s principle
    Features of the slot antenna
    Uniqueness theorem
    Features of pyramided horn antenna
    Babinet’s principle
    Limitation of lens antenna
    Application of dielectric and metal plane lens antenna
    Equivalence principle
    1. Electric surface current
    2. The magnetic surface current
    Slot antennadesign of paraboloid
    Feeding system
    1. Rear feed
    2. Front feed
    3. Offset feed
    4. Cassegrain
    5. Gregorian feed
    Horn antenna
    Types
    1. E-plane sectoral horn
    2. H – plane sectoral horn
    3. Pyramidal horn
    4. Conical horn
    5. Biconical horn
    Design of horn antenna

    UNIT-4

    SPECIAL ANTENNAS AND ANTENNA MEASUREMENTS
    Application of helical antenna
    Features of anechoic chamber
    Types of feed method
    Application of microstrip antenna
    Turnstile antenna
    Limitation
    Log periodic dipole array
    1. Apex angle
    2. Design ratio
    3. Spacing factor
    Directivity measurements
    Gain measurements
    Gain measurements by direct comparison method
    Measurement of absolute gain
    Helical antenna
    Pitch angle
    Modes of radiation
    1. Normal mode
    2. Axial mode
    Axial mode of radiation
    Application

    UNIT-5

    RADIO WAVE PROPAGATION
    Skip distance and virtual height
    Duct propogation
    Faraday rotation
    Critical frequency
    Collision frequency 
    Types of fading in ionosphere
    1. Selective fading
    2. Interference fading
    3. Absorption fading
    4. Polarization fading
    5. Skip fading
    Structure of the ionosphere
    1. D-layer
    2. E- layer
    3. Es –layer
    4. F1- layer
    5. F2-layer
    Mechanism of ionosperic propogation
    Troposphere
    Optimum working frequency
    Skip distance
    Virtual height
    Derivation of effects of earth magnetic field
    Effects of earth magnetic field
    Composition of the ionosphere
    Refractive index of the ionosphere
    Unit-1 problems
    Unit 2 problems
    Unit 3 problems
    Unit 4 problems
    Unit 5 problems
    Unit wise possible question
    Nov dec 2011 question paper
    May june 2012 question paper
    Nov dec 2012 question paper
    Cross word 
    Nov dec 2013 question paper

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