ECEN 5264 Lecture 10

ECEN 5264 Lecture 10 - ECEN 5264 Electromagnetic Absorption...

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ECEN 5264 Electromagnetic Absorption Electromagnetic Absorption, Scattering, and Propagation (P ti Eff t S t llit C i ti ) (Propagation Effects on Satellite Communications) Professor Albin J. Gasiewski Lecture #10 – February 10, 2011 ECOT 246 303-492-9688 (O) [email protected] 1 Classes: ECCS 1B14 TR 9:30-10:45 AM University of Colorado at Boulder Spring 2011 ECEN 5264 EM Absorption, Scattering, & Propagation
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Administration • Reading: – EASP slides – EASP text (available on CULearn) – Additional references K.G. Budden, Radio Waves in the Ionosphere EASP Midterm Exam – February 17, 2011 – In class, 75 minutes – Two questions, multiple parts – Open notes, calculators allowed 2 University of Colorado at Boulder Spring 2011 ECEN 5264 EM Absorption, Scattering, & Propagation – No PDA, PCs, cell phones
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Last Lecture Plasma frequency & collisions • Plasma dispersion relation Plasma dispersion relation Magnetized plasmas 3 University of Colorado at Boulder Spring 2011 ECEN 5264 EM Absorption, Scattering, & Propagation
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Today’s Lecture Permittivity tensor Propagation eigenmodes Faraday rotation • Appleton Hartree formulation Appleton-Hartree formulation 4 University of Colorado at Boulder Spring 2011 ECEN 5264 EM Absorption, Scattering, & Propagation
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Dispersion Diagram - Collisionless Plasma ! ! p or k' k" / 5 k ! p /c
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Dynamics in DC Magnetic Fields z I b f lli i d In absence of collisions and applied electric field Lorentz f t t t ti l i y force acts to turn particle in direction orthogonal to its ti x m,q motion: 0 6
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