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Engineering Electromagnetics 1 0909.301.01 Fall 2004

Engineering Electromagnetics 1 0909.301.01 Fall 2004. Lecture 6a October 12, 2004. Shreekanth Mandayam ECE Department Rowan University http://engineering.rowan.edu/~shreek/fall04/eemag1/. EEMAG-1: Topics Today. Plan. Electrostatics Capacitance Parallel plate capacitor: A closer look

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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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