Engineering Electromagnetics 1 0909.301.01 Fall 2004

1
Engineering Electromagnetics 10909.301.01 Fall
2004
Lecture 6aOctober 12, 2004

• Shreekanth Mandayam
• ECE Department
• Rowan University
• http//engineering.rowan.edu/shreek/fall04/eemag1
  /

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EEMAG-1 Topics Today
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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

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Capacitance
Capacitance Good! Capacitance
Bad!
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Parallel-Plate Capacitor
x
- - - - - - - - - - - - - - - - - - - - -
d
z

Vs
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A Real Capacitor
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RF Electronics
10 GHz Satellite Receiver Downconverter
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Microstrip Lines
Cross-talk
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Microstrip Strip Line Configurations
microstrip
buried microstrip
striplines
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Coaxial Cable
Vs
y
r
x
a
b
z
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Lorentz Force Law
Force N
Magnetic Flux Density T
Velocity m s-1
Electric Field V m-1
Charge C
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Motion of a Charge in a Uniform Electrostatic
Field
Let
DEMOmotionestat
At time t
At time zero
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Cathode Ray Oscilloscope
Vx
x
anode
cathode
z
screen
Vy
y
deflection plates
VA
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Ion Thruster
Xenon propellant
ions
Xe
Xe
e-
electrons
65,000 mph
Text pp. 350-352
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Summary