Rocky Mountain Chapter EMC Society |
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Our last meeting was ..... The Basic
Physics of ElectroMagnetics Download
the presentation here Presenter: W. Scott Bennett What we saw: Scott wanted to present a different way of studying elctromagnetic fields that can actually be applied to real life problems. The presentation kicked off with the basics: the cause of electromagnetic fields are electric currents. Although not a revelation to many, this was the cornerstone of his presentation development. In the entire talk, Scott never once mention voltage, rather the analysis was entirely based on an analysis of the current propagation along a transmission line. Indeed Scott created some discussion when he presented the concept of +ve and -ve current on the same wire.Scott then graphically showed how currents along the transmission line are different ( for different phases) and demonstrated how currents can double and subtract along the transmission line path. Having formed that basis, Scott then presented a new point source - the differential monopole. This is a simpler quivalent of the differential dipole - or Herzian dipole. Scott then developed the fields caused by that source using some basic EM theory and "high-school" math.Using the differential monopole, Scott showed that, in order to meet EMC requirements, the distances between equal and opposite point sources of a trace and its return should be minimized. This implies that the loop area is minimized and that the trace and its return have the same length so that they have the same number of point sources. The conclusion of the talk nicely rounded off the presentation - Scott did indeed show that one could use this new concept to analyze EM fields without knowing Maxwells equations. Date : March 21 2001 Location: StorageTek Corporation Times: 1:00pm - 4:00pm Pictures from our March meeting
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