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aklec01 - ECE 450 Adnan Kksal Visiting Professor Electrical...

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ECE 450 Adnan Köksal Visiting Professor Electrical and Electronics Eng. Dept. Hacettepe University, Ankara, TURKEY Office: EL 362 Office Hours: MW 14:00 Phone: 244 3987 E-mail: [email protected]
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COURSE CONTENTS In ECE 329 Maxwell Equations are covered with their circuit applications. You learned that when the wavelength at the frequency of operation is comparable to circuit dimensions, usual lumped circuit theory cannot be used. The circuit as a whole must be considered as a distributed circuit, and the techniques that you learned for waves on two-wire transmission lines must be utilized. ECE 450 is a continuation course in electromagnetics that builds on ECE 329. In this course, we will 1. See radiation from simple yet practical antennas. Basic terms and definitions of radiation and antennas will be given, and techniques to direct the EM energy in space will be studied. 2. Propagation of TEM waves in arbitrary direction in 3D space, their reflection and refraction at a boundary will be investigated. 3. Effect of frquency dependent propagation media will be studied. 4. Techniques for quiding waves along waveguiding structures, and the propagation types for these structures will be investigated. Cavities, and the field variation in them will be studied. 5. Antennas will be studied as a part of a communication system.
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Maxwell’s Equations in Differential Form law) s (Ampere' (4) law) s (Faraday' ) 3 ( 0 ) 2 ( law) (Gauss' (1) t t D J H B E B D In general material media: D = E and B = H where permittivity and permeability is frequency dependent. In free-space or air: D = E and B = H H/m 10 4 F/m 36 10 7 0 9 0 and m/s 10 3 1 8 0 0 c
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Meaning of Maxwell’s Equations law) (Gauss' (1) D The scalar volume source density for D is . If we model the vector field strength by density of field lines, then
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