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Berkeley ELENG 117 - EE117 Expanded Description

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1. Department, number and title of course: Electrical Engineering and Computer Sciences: EE 117 – Electromagnetic Fields and Waves 2. Catalog Description: (4 units) Three hours of lecture and one hour of discussion per week. Formerly 117A-117B. Review of static electric and magnetic fields and applications; Maxwell's equations; transmission lines; propagation and reflection of plane waves; introduction to guided waves, microwave networks, and radiation and antennas. Minilabs on statics, transmission lines, and waves. The course begins with simple applications of static electric and magnetic fields to symmetric transmission line structures such as the coaxial cable. A gradual understanding of TEM modes is developed as wave phenomena and Maxwell's equations are introduced. Following this introduction transmission line theory and applications are considered both for pulsed and continuous wave applications. The Smith chart is introduced and the more general nature and wideapplicability of bilinear transformations is emphasized. A more detailed discussion of Maxwell's equation and application are then considered; the divergence and Stoke's theorems, the Lorentz force equation and applications considered. The scalar and vector potential are introduced and the static electric and magnetic dipoles introduced as a prelude to antenna concepts. Propagation and reflection of plane waves at boundaries emphasizing the transmission line analogs is then treated. Evanescent waves and their importance in optical and other devices is discussed. Guided wave concepts, microwave networks, and radiation and antennas as well as various antenna arrays are introduced. Minilabs on statics, transmission lines, antennas, Faradays Law, and basic optics are carried out by student groups.3. Prerequisites: EE40, Mathematics 53, 54, knowledge of phasor analysis (e.g., as taught in EE40), Physics 5b. 4. Textbooks and/or other required material:Over the past three years the primary texts which have been used are:- Fields and Wave in Communication Electronics, S. Ramo, J. R. Whinnery, and T. Van Duzer, (John Wiley and Sons, 3'rd Ed. (2000)- Electromagnetics With Applications, J. D Kraus and D. A. Fleisch (McGraw-Hill , 5'th Ed. ( 1999)- Fundamentals of Applied Electromagnetic Theory, Fawwaz T. Ulaby, (Prentice-Hall, 2004 media ed.).- For additional self-help and problem practice Schawm's Outline, Electromagnetics [McGraw-Hill 2nd ed. (1993) was recommended]. A set of online minilab descriptions and work sheets were also available and required.5. Course objectives: To provide the basic skills required to understand, develop, and design various engineering applications involving electromagnetic fields. To lay the foundations of electromagnetism and its practice in modern communications such as wireless, guided wave principles such as fiber optics and electronic electromagnetic structures including those on the sub-micron scale. To provide basic laboratory exposure to electromagnetic principles and applications.6. Topics Covered (Course Outline)a) Basic Electro-magnetic Relationships – Introduction to wave motion, phase speed, basic forms of the wave equation, the electromagnetic spectrum, complex phasor notation, transverse waves on a stringb) Transmission lines – Circuit models of transmission lines and the coaxial line; the relationship of the coaxial transmission line to Ampere’s and Gauss’ Laws; basic derivations of L and C; transmission and reflection coefficients, pulses and transients; the capacitively loaded line and implications for high speed-digital systems; sinusoidal waves; standing wave ratio; expressions for impedance,transmission, and reflection coefficient and power flow; Smith chart relating complex reflection coefficient and impedance; scattering parameters and the Smith chart; single and double stub tuning; quarter wave tuning; lossy transmission lines; basic concept of resonance on transmission lines; Gaussian pulse propagation: group and energy velocityc) Introduction to Maxwell’s Equations – Review of vector analysis and coordinate systems; gradient, perpendicularity, and wave phase fronts; surface and volume integrals; Gauss’ law; Gauss’ law for magnetism; line integrals, currents and Ampere’s law; divergence of a vector and Gauss’ law in differential form; the divergence theorem; curl of a vector field and Ampere’s law in differential form; Stoke’s theorem; the Laplacian operator; Maxwell’s equations; displacement current, continuity and Maxwell’s equations; charges, conduction, convection, and diffusion currents; introduction to magnetic and electric potentials; Faraday’slawd) Intermediate Aspects of Maxwell’s Equations; Dynamics – Scalar and vector potentials; generalizations of the potentials to include retardation; boundary conditions; capacitance and inductance; Poynting’s theorem, power flow, and stored energy; Maxwell’s equations for the sinusoidal steady-state (phasors); polarization; the steady-state Poynting vector and theorem; propagation in lossy media; forces, torque, and worke) Reflection and Transmission at Interfaces – EM waves at boundaries and the transmission line analog; Snell’s “laws” and the critical angle; oblique incidence; Brewster’s angle; TEM modes and the coaxial cable; ray model of guided waves:TE and TM waves, cutoff, and phase velocity; general formulation of wave-guidefields; hollow metallic wave guides with guiding in one dimension; planar transmission lines; general properties two dimensional-rectangular guides; powertransfer; dielectric, conical, slab-wave guides; periodic structures; optical fibers; loss and dispersion; resonatorsf) Antennas, Radiation, Diffraction, and Wireless Systems – Basic antenna parameters for single and arrays of antennas; directivity and gain; effective area; Friis formula and its relation to uncertainty; signal to noise and the Friis equation; basic radar equation as extension of Friis equation; review of potentialsand the Hertzian dipole; long-wire antenna; radiation resistance; arrays; far field, near field and the Fourier transform; circuit approach to arrays; Yagi-Uda arrays; integrated antennas; imaging, geometrical optics, and Gaussian beamsg) Electromagnetic Properties of Materials (as time permits) – Linear isotropic media; anisotropic media; introduction to electro-optics7. Class/laboratory schedule: Three one hour classes per week and five minilabs (approximately one


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