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picturesEdit

TDREdit

 
Simple TDR made from lab equipment.
 
Simple TDR made from lab equipment.
 
TDR trace of a transmission line with an open termination.
 
TDR trace of a transmission line with a short circuit termination.
 
TDR trace of a transmission line with a capacitor termination.
 
TDR trace of a transmission line with an ideal termination.
 
TDR trace of a transmission line with termination on an oscilloscope input.

Two PortsEdit

 
Two port double source balanced.
 
Two port single source balanced.
 
Two port double source unbalanced.
 
Two port single source unbalanced.

PadsEdit

 
Two port to pi pad.
 
Converstion between Pi pad and Tee pad.
 
Pi pads and O pads
 
Pi pad and L-pad between different impedances.
 
Pi pad between different impedances.

Equivalent Circuits of Transmission LinesEdit

 
Coaxial transmission line.
 
Signal flow gtraph for a two ended transmision line.
 
Equivalent circuit of a transmission line described by the Telegrapher's equations.
 
Solutions of the Telegrapher's Equations as Components in the Equivalent Circuit of a Balanced Transmission Line Two-Port Implementation.

Representations of E&M Plane WavesEdit

http://groups.google.com/group/sci.physics/browse_frm/thread/ab9e9181deca125f/ccd9181e9cf6bb84?hl=en&tvc=1&q=sci.physics.*++rbmccammon#ccd9181e9cf6bb84

One of the best usenet discussions on Poynting vector and wires and angular momentum. Some day I'm going to write it up as a dialog between the Tortoise, Achilles and some other characters.

Total B Field Confinement by Toroidal InductorsEdit

 
Fig. 1. Definition of the coordinate system.
 
Fig. 2. An axially symmetric toroidal inductor with no circumferential current.


 
Fig. 3. Toroidal inductor with circumferential current


 
Fig. 4. Circumferential current countered with a return wire. The wire is white and runs between the outer rim of the inductor and the outer portion of the winding.
 
Fig. 5. Circumferential current countered with a return winding.
 
Fig. 6. Circumferential current countered with a split return winding.

E Field in the Plane of the ToroidEdit

 
Fig. 7. Simple toroid and the E-field produced. +/- 100 Volt excitation assumed.
 
Fig. 8. Voltage distribtion with return winding. +/- 100 Volt excitation assumed.

Toroidal Transformer PresentationEdit


Isolation Transformer PresentationEdit

 
A simple 1:1 isolation transformer without any special features.
 
A simple 1:1 isolation transformer with an extra dielectric barrier between primary and secondary.
 
A simple 1:1 isolation transformer with an extra dielectric barrier and an electrostatic shield between primary and secondary.
 
A 1:1 isolation transformer with primary and secondary wound on a split bobbin.
 
A 1:1 isolation transformer with primary and secondary wound on separate bobbins.


Magnetic Vector Potential of a ToroidEdit

 
Fig. 3. Toroidal inductor with circumferential current
 
Fig. 2. Toroidal inductor with circumferential current
 
Fig. 2. Toroidal inductor with circumferential current