Models, Measurement, and Mitigation To order this title, and for more information, click here
By Kevin Slattery Harry Skinner
Description Intra-system EMC problems are becoming increasingly common in mobile devices, ranging from notebook PCs to cell phones, with RF/wireless
capbilities. These issues range from minor annoyances to serious glitches which impede the functioning of the device. This book gives
a thourough review of electromagnetic theory (including Maxwell's equations), discusses possible sources and causes of intra-system interference,
shows to use models and analysis to discover potential sources of intra-system EMC in a design, how to use appropriate tests and measurements
to detect intra-system EMC problems, and finally extensively discusses measures to mitigate or totally eliminate intra-system EMC problems.
With more and more mobile devices incorporating wirless capability (often with multiple wireless systems, such as Bluetooth and WiFi),
this book should be part of the reference shelf of every RF/wireless engineer and mobile device designer.
Audience
RF/Wireless Engineers; Mobile Device Designers
Contents Chapter 1: Introduction
Describing the problem
The Radio Channel
Platform emissions impact on a radio receiver
Platform to radio isolation
requirements
Platform RF snapshots
3 meter measurements
Platform RF as seen at the radio front end
Broad-band measurements in the
near field
Desktop and notebook platforms
Small form factor platforms
System components as noise sources
Platform RFI sources- Summing
it up
Section 2: Platform Signals
Chapter 2: The Structure of Signals
Harmonic variation with time
Signal Asymmetry
Variation with
duty cycle
Non-repetitive signals
Spread spectrum clocks
Data sequences as signals
The impact of equalization
Platform display symbols
The spectrum of complex symbol sequences
Time structure of symbols
Comparison of PRBS, clock and symbol sequences
Chapter 3: Analysis
of Symbols
Ordering finite symbol sets for RFI
Wireless performance in the presence of display symbols
Measuring interference impact
Analysis of differential symbols
Signal structure jitter and the impact on EMI and RFI
Section 3: Measurement and Models
Chapter 4:
Measurement Methods
Measurement methods, near field scanning
Fields in dielectrics
Locating system sources of interference
Near field
scans of clock ICs
Energy flow in the near field and the transition to the far field
Broad-band measurements with a horn antenna
Measurements
with the GTEM cell
Far field measurements using anechoic chambers
Reverberation chambers
Chapter 5: Electromagnetics
Electromagnetic
units
Maxwell's equations for the static condition
Maxwell's equations for the time varying condition
The electric scalar potential
The magnetic scalar potential
Radiation mechanisms
Chapter 6: Analytical Models
The elementary electric dipole
The field impedance
of the electric dipole
The extended dipole model
Measured near fields over silicon
Building a model of the radiation surface of multiple
sources
The magnetic dipole
Building system models using PCI Express
Comparing model and measurement
Chapter 7: Connectors, cables
and power planes
Power Distribution Radiated Emissions
Further investigations with various power topologies
Chapter Summary
Section
4: Mitigation Techniques
Chapter 8: Passive Techniques
Introduction
Passive Mitigation
Shielding
Absorbers
Layout
Chapter 9: Active
Mitigation
Frequency Planning
Controlling Frequency Content
Radio Improvements
Appendix A: Appendix to Chapter 2
Appendix B: Appendix
to Chapter 3
References
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