The Electronic Buddy: Microwave Engineering

R13 ECE Syllabus book Download

Directional Coupler

Example problem: solved notes

Reference from: Kulkarni Text

Note :- These notes are according to the r09 Syllabus book of JNTUH

Unit-l

Microwave Transmission Lines – I: Introduction, Microwave Spectrum and Bands, Applications of Microwaves. Rectangular Waveguides – Solution of Wave Equations in Rectangular Coordinates. TE/TM mode analysis. Expressions for Fields. Characteristic Equation and Cut-off Frequencies, Filter Characteristics, Dominant and Degenerate Modes, Sketches of TE and TM mode ﬁelds in the cross-section, Mode Characteristics – Phase and Group Velocities. Wavelengths and Impedance Relations, Illustrative Problems

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UNIT II

Microwave Transmission Lines – ll: Rectangular Guides – Power Transmission and Power Losses. Impossibility of TEM Mode, Micro strip Lines- Introduction. Z0 Relations. Effective Dielectric Constant, Losses. Q factor Cavity Resonators— Introduction. Rectangular Cavities. Dominant Modes and Resonant Frequencies. Q factor and Coupling Coefﬁcients. Illustrative Problems

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Unit lll

Waveguide Components And Applications – l: Coupling Mechanisms – Probe, Loop, Aperture types. Waveguide Discontinuities – Waveguide Windows, Tuning Screws and Posts. Matched Loads. Waveguide Attenuators – Different Types, Resistive Card and Rotary Vane Attenuators: Waveguide Phase Shifters — Types, Dielectric and Rotary Vane Phase Shifters, Waveguide Multiport Junctions — E plane and H plane Tees, Magic Tee. Directional Couplers – 2 Hole. Bethe Hole types. Illustrative Problems.

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Unit IV

Waveguide Components And Applications – II: Ferriles» Composition and Characteristics. Faraday Rotation: Ferrite Components — Gyratot, Isolator, Circulator. Scattering Matrix- Signiﬁcance, Formulation and Properties, S Matrix Calculations for – 2 port Junctions, E plane and H plane Tees. Magic Tee. Circulator and isolator. Illustrative Problems.