Download Understanding electromagnetic effects using PCB demos

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Introduction
Demos are often used in electromagnetic (field) courses. We have developed many types of
demos and used also demos developed by others, such as those described in the IEEE EMC Education Manual [IEEE04] and [IEEE92], or the demo developed within the ASIAN-EU University
Network Program [ASEU], or within PATON [PATON09]. Two main drawbacks could be observed:
1. We could easily show the fundamental aspects such as Lenz Law, or crosstalk, in an idealized
world, but this was not taken for granted by practicing engineers: these engineers needed a
link to their own world. Especially people involved in signal and power integrity issues, ground
bounce and interconnects: Their world is often a printed circuit board.
2. The size of many of the demos is huge. Transportation of such demos is therefore a problem.
Hence we decided to develop a series of demos on Eurocard (100x160mm) printed circuit boards
(PCB) [KNIJF05]. Test equipment consists in most cases of a basic generator, a dual channel
oscilloscope, and, if available, a basic spectrum analyzer. The demo kit has been presented at
several EMC conferences [LEFea08], [LEF09] [BUE809] and [BUE909] and many, many people
were interested. Therefore a new generation was developed. The detailed description of these
new demo PCBs is presented in this document in Chapters 1 through 9. Table 1 shows where the
descriptions can be found in this manual.
Table 1: Survey of Currently Available EMC Demo Boards
Demonstration Subject
Self Inductance
Lenz’s Law
Coax Cable
Transfer Impedance
Crosstalk - Basic phenomena
Crosstalk - Layout Issues
Inductance of Capacitors - Via’s and Value
Inductance of Capacitors - Different dielectrics
Inductance of Capacitors - Package and Value
Grounding of Filter
Discontinuities - Stubs
Discontinuities - Ground Slot
Ground Bounce - Package Type
Ground Bounce - Package Type Mk2
Ground Bounce - End or Center Pinning Power
Ground Bounce - End or Center Pinning Power Mk2
Chapter
1
2
3
4
5
6
7
8
9
10
??
12
13
14
15
16
Page
1
11
21
27
35
45
55
65
73
81
??
97
107
117
125
133
Over time new experiments will emerge. The Ground Bounce experiments, as an example, now exist
in two versions. The second version is labelled Mk2 (Mark 2) to distinguish it from its predecessor.