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Engineering Electromagnetics 1 0909.301.01 Fall 2004

Explore topics on electrostatics, capacitance, microstrip lines, Lorentz Force Law, and more in this comprehensive lecture. Learn about the applications of capacitance and the behavior of charge in electric fields.

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Engineering Electromagnetics 1 0909.301.01 Fall 2004

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  1. Engineering Electromagnetics 10909.301.01Fall 2004 Lecture 6aOctober 12, 2004 Shreekanth Mandayam ECE Department Rowan University http://engineering.rowan.edu/~shreek/fall04/eemag1/

  2. EEMAG-1: Topics Today

  3. Plan • Electrostatics • Capacitance • Parallel plate capacitor: A closer look • Fringing fields in a “real” capacitor • RF Electronics - Microstrip Lines • Coaxial cable • Lorentz Force Law • Motion of a charge in an electrostatic field • Applications

  4. Capacitance Capacitance Good! Capacitance Bad!

  5. Parallel-Plate Capacitor x - - - - - - - - - - - - - - - - - - - - - d z + + + + + + + + + + + + + + + + Vs

  6. A “Real” Capacitor

  7. RF Electronics 10 GHz Satellite Receiver Downconverter

  8. conductor insulator Ground plane (conductor) w er d Microstrip Lines “Cross-talk”

  9. er1 er er2 er er Microstrip & Strip Line Configurations microstrip buried microstrip striplines

  10. Coaxial Cable Vs y r x a b z

  11. Lorentz Force Law Force [N] Magnetic Flux Density [T] Velocity [m s-1] Electric Field [V m-1] Charge [C]

  12. z At time zero At time t x Motion of a Charge in a Uniform Electrostatic Field Let DEMO:motionestat At time t At time zero

  13. Cathode Ray Oscilloscope Vx x anode cathode z screen Vy y deflection plates VA

  14. http://nmp.jpl.nasa.gov/ds1/ Ion Thruster Xenon propellant + ions Xe Xe+ e- electrons 65,000 mph Text: pp. 350-352

  15. Summary

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