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Electrical and Computer Engineering Seminar
Wednesday, November 30, 2011 1:30‐3PM
Hall of Fame Conference Room
Controlling Automotive Radiated Emission by Design
Cyrous Rostamzadeh, Robert Bosch LLC
Abstract: The modern automobile has become an extremely complex and challenging
electromagnetic environment with an ever increasing number of onboard electronic modules. The
switching of core digital logic, such as DSPs, ASICs and microcontrollers, with high clock frequencies
creates a major challenge to the designer in terms of minimizing the electromagnetic emissions and
susceptibility of a control system. Automotive radiated emission requirements are 54 dB more stringent
that those mandated by the FCC for residential and industrial electronics.
Radiated Emission (RE) Compliance with stringent OEM requirements is a major challenge for
the electronic design engineers involved in the automotive sector. Substantial number of RE failures is
related to printed circuit boards, or the components. Continuous scaling and the introduction of new
device concepts and materials have brought many new RE challenges. Despite the strong need for
understanding of RE mechanisms, there has been a perception that EMC engineering is a ‘black art’.
EMC engineers used to provide solutions based on their experience without fundamental understanding
of failure mechanisms. In today’s competitive markets, it is essential for the EMC engineers to
understand Radiated Emission fundamentals and reduce design iterations thus minimizing product costs.
For EMC engineers responsible for product development and compliance, an in-depth understanding of
the RE is very important. In this presentation, key RE mechanisms and the mitigation concepts will be
outlined. In addition, the use of the computational EM tools and their role in the identification and
mitigation of RE source will be exploited and discussed.
Biography: Cyrous Rostamzadeh is currently an EMC Technical Specialist at Robert Bosch LLC,
Plymouth – Michigan, where he has implemented an EMC design and analysis process to facilitate
product compliance at the lower cost. Since 1997 at Bosch, he is engaged in PCB and system level EMC
robustness techniques and solutions. He is responsible to provide product design support and EMC
interface to NA, Asian and European automotive market. During the past 14 years at Bosch, he has
played key role in the design, development of EMC and signal integrity solutions for global Bosch market.
Prior to joining Bosch, he was a senior EMC engineer at Ford Motor Company. His extensive research on
load dump transient event resulted in identification of realistic waveform. His research has shaped the
revised US EMC automotive standards. He was a core member of Ford EMC design and test process
methodology team. In addition to Ford, he was a senior EMC engineer at General Motors Corporation.
From 1989 – 1994 he was a senior electrical engineer at Superconducting Super Collider Laboratory
(SSCL) Dallas, Texas. He was responsible for development and design of quench protection and
detection electronics for superconducting magnets. He was also employed at National Semiconductor as
analog engineer. He spent 3 years at Grunding Corporation as RF engineer.
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Cyrous received a B.Sc. (Hon.) and MSc. in Physics, MSEE in Electrical Engineering from
Imperial College of Science and Technology, University of London (UK). He is an associate of the Royal
College of Science (UK). He participated at MIT during the summer of 1990 on the design and
development of High Power SSCL Quench Bypass Switch. He received Particle Accelerator Physics
training at Stanford University (1992). He is a senior IEEE member, NARTE certified EMC and Product
Safety Engineer. He is an active member of IEEE EMC TC-9 Computational Electromagnetics committee.
He has given numerous EMC seminars and training courses to Bosch engineering associates, and IEEE SE
Michigan EMC Chapter. He has published extensively at IEEE EMC, IEEE PAC, URSI-GA and ASEE
symposium. Cyrous was an invited guest speaker at European Space Agency (ESA) Florence, Italy - March
2009.
Cyrous Rostamzadeh
All students, faculty, and public are welcome.