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Our consultant Nico van Dijk received
his doctorate on June 27th, 2007.The title of his dissertation
was: New Concepts for EMC Standards Applicable to Multimedia
Products
Nico van Dijk, employed at the EMC center of Philips
Applied Technologies, NPI services, started working for
our department in 2001 on reverberation chambers. His dissertation
is a deepening and broadening the scope of his initial work.
The basis of his theses is the convergence of Multimedia
products - IT functions and Wireless LAN connections. This
convergence can be characterized by products that:
- operate at frequencies above 1 GHz vs traditional
VHF/UHF bands below 1GHz
- are part of wireless connected systems vs isolated
products
- include more and more digital components with an
increased number of complex functions
- receive digital broadcasts vs. analogue broadcasts
These new products should be functioning with existing
products in the home, office but also in area’s like cars
and hospitals. This implies that in order to have interference
free functioning products and applications (current and
future) objective measurement methods should be defined.
These trends lead to the need of new standardized test methodologies.
Based on these trends he identified 3 distinct aspects
that he studied:
- The deviation in radiated emission results caused
by different type of receiving antennas
- The conversion of results from measurements in a
reverberation chamber to those of a SAR/FAR
- New concepts in immunity test-signals.
The results of his work are now used in the draft standard
for multimedia products from the International Special Committee
on Radio Interference (CISPR) for basic standards (CISPR/A)
and emission measurements and immunity tests for multimedia
products (CISPR/I).
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