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Intra-System EMI
Top 10 ISO/IEC 17025:2017 Deficiencies Found in Electronics Testing Laboratories

Automotive EMC Testing: CISPR 25, ISO 11452-2, and Equivalent Standards, Part 2

9 Steps to Select a Test Cable for Millimeter Wave Applications

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Top 10 ISO/IEC 17025:2017 Deficiencies Found in Electronics Testing Laboratories

Automotive EMC Testing: CISPR 25, ISO 11452-2, and Equivalent Standards, Part 2

9 Steps to Select a Test Cable for Millimeter Wave Applications

April 2023
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EMC Concepts Explained
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On Your Mark
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Hot Topics in ESD
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April 2023
Volume 15 l Number 4
By Dr. Min Zhang
Many individual components in electrical and electronic systems and devices are integrated into systems that are required to function as a whole. Examples of such systems include large electric vehicles, fixed industrial installations, novel scientific products such as quantum computers, and more. There are two EMC-related aspects to consider: intra-system EMC and inter-system EMC. This article focuses on the intra-system EMC aspect while also considering the inter-system aspect.
By Rob Miller
Whether your organization is seeking ISO/IEC 17025 accreditation for the first time or renewing your current accreditation, there are a few frequently overlooked or misunderstood sections of the ISO/IEC 17025 standard to which we must pay close attention.
By Garth D’Abreu, Craig Fanning, and Ammar Sarwar
This two-part article provides an overview of current automotive EMC standards and the intricacies of chamber testing automotive systems and components. In Part 2 of this article, we’ll address antennas used for automotive EMC testing.
By John Muzzio
Radio signal frequencies are rising to the millimeter-wave (mmWave) range as applications such as 5G networks and automotive radar systems seek more bandwidth at higher frequencies. Testing is an important part of producing new products at mmWave frequencies and coaxial cable assemblies are vital parts in getting signals from a signal generator to a device under test (DUT) and then to an analyzer.
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compliance news
Apple Files Patent for EMC Testing Chamber
One of the world’s most prolific developers of innovative technology products for consumers and businesses appears to be expanding its innovation efforts into the EMC testing space.

According to a recent article posted to the website “Patently Apple,” a patent application, titled “Electromagnetic Shielding Testing Chamber with Ventilation,” was published earlier this month by the U.S. Patent & Trademark Office. The patent application details a testing apparatus for electromagnetically sensitive equipment that includes…

EU Commission Proposes to Extend MDR/IVDR Deadlines
The Commission of the European Union (EU) has proposed extending the transition period for existing medical devices under its Medical Device Regulation (EU 2017/745, also known as the MDR) and the In Vitro Diagnostic Regulation (EU 2017/746, also known as the IVDR).

The Commission is seeking to extend the validity of certificates issued between May 2017 and May 2021 under Directive 93/42/EEC for medical devices…

Featured Article
Troubleshooting Intra-System EMI
Some Case Studies That Demonstrate Good Techniques for Grounding, Shielding, and Cabling
By Dr. Min Zhang
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he concepts of intra-system and inter-system electromagnetic compatibility (EMC) are defined in [1]. Inter-system EMC focuses on the compatibility of a system with its environment and with other systems and apparatus in that environment. Intra-system EMC, on the other hand, deals with the compatibility with each of the various other items within the system.

Experience has shown that most intra-system EMI issues are related to inadequate grounding structure, as the power and signal integrity of devices in a system are tied to the return path. This article will review three case studies to illustrate how to achieve a proper grounding structure.

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Feature Article
Top 10 ISO/IEC 17025:2017 Deficiencies Found in Electronics Testing Laboratories
Consider These Clauses When Conducting Your Laboratory’s Internal Audit
By Rob Miller
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chieving ISO/IEC 17025:2017 accreditation for your electronics testing laboratory can be an exhaustive and time-consuming process. But an outside evaluation based on internationally recognized standards can improve your organization’s overall competitive advantage. Accreditation not only showcases your organization’s commitment to quality work but also demonstrates the integrity of your personnel and supports the validity of your test results.

Whether your organization is seeking ISO/IEC 17025 accreditation for the first time or renewing your current accreditation, there are a few frequently overlooked or misunderstood sections of the ISO/IEC 17025 standard to pay close attention to. If you and your team members are aware of the common deficiencies most often experienced in connection with these sections, you’re better positioned to identify them through internal audits and address them before seeking accreditation from an outside accreditation body.

Featured Article
Automotive EMC Testing:
CISPR 25, ISO 11452-2, and Equivalent Standards, Part 2
Antennas, Patterns, and Ground Benches for Testing for Automotive Components and Full Vehicles
By Garth D’Abreu, Craig Fanning, and Ammar Sarwar
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This two-part article is an update of the original article authored by Dr. Vince Rodriguez, then with ETS‑Lindgren. An earlier update was published in the February 2016 issue of  In Compliance Magazine.


n Part 2 of this article, we shall talk a bit about the antennas used for automotive EMC testing. Specifically, we are going to concentrate on the typical biconical, LPDA, and DRH antennas recommended for CISPR 25, and the DRH antenna recommended for ISO 11452-2.

Feature Article
9 Steps to Select a Test Cable for Millimeter Wave Applications
Coaxial Cable Characteristics to Consider
By John Muzzio
10 different types of cables

adio signal frequencies rise to the millimeter-wave (mmWave) range as applications such as 5G networks, automotive radar systems, and RF semiconductor probing demand more bandwidth at higher frequencies. Testing is an integral aspect of developing quality new products that will operate in these mmWave frequencies, and coaxial cable assemblies play a vital role in the process.

However, given the complexity of mmWave applications, not just any coaxial cable will do. Critical parameters such as impedance match and insertion loss must be considered to obtain repeatable, reliable test results at higher frequencies. As a result, RF testing for mmWave applications requires unique coaxial cable and connector solutions.

EMC concepts explained
Smith Chart and Input Impedance to Transmission Line
Part 1: Basic Concepts
By Bogdan Adamczyk

his is the first of the three articles devoted to the Smith Chart and the calculations of the input impedance to a lossless transmission line. This article begins with the load reflection coefficient and shows the details of the calculations leading to the resistance and reactance circles that are the basis of the Smith Chart. A sample Smith Chart is shown in Figure 1, [1].

Quite a daunting picture at first, isn’t it? It isn’t! To gain an insight into it let’s start with some basics of the transmission line model and the load reflection coefficient. It is the load reflection coefficient that is the foundation of the Smith Chart.

1. Transmission Line Model and Load Reflection Coefficient
A typical model of a transmission line is shown in Figure 2.
hot topics in ESD
Challenges of Designing System-level ESD Protection at the IC Level, Part 2
Conducting System-level ESD Current
By Hans Kunz for EOS/ESD Association, Inc

previous article (Challenges of Designing System-Level ESD Protection at the IC Level: Misconceptions Regarding Current Flow to the IC [1]) highlighted the challenges an IC designer faces when trying to determine the actual current that will flow into the IC during system-level ESD exposure. Once the current magnitude, duration, and wave shape reaching the IC are established, the next challenge can be addressed—properly designing for the current to flow through the IC, without impacting the system performance. As shown in Figure 1, this requires allowing the system-level current to flow through the board and the IC (both the IC package and die).

It is a common misconception that designing an IC for system-level ESD requirements simply requires an increase in the capability of the ESD cells, which are already present for safe handling ESD requirements, like Human Body Model (HBM). While creating an ESD cell that can conduct system-level ESD current is certainly not a trivial task, there are other significant challenges that must also be addressed. This article will discuss three of those challenges…

on your mark
Deciphering Safety Symbol Complexities
By Erin Earley

or those that follow the “On Your Mark” column, you know that ANSI Z535 and ISO 3864 – the voluntary, consensus standards in the U.S. and internationally – provide critical guidance for developing today’s most effective on-product labels and warnings. That’s why, in our last article, we focused in on understanding the latest safety label formatting options available to you, per the most recent updates to these best practice standards. Now, we’re going to cover specifics on symbol use – one of the fundamental elements of your labels – and options for handling complexities you may be facing.

What is a Safety Symbol?
Also known as pictograms, pictorials, or glyphs, safety symbols can help to communicate a particular safety message – which is a key part of accident prevention and keeping people safe from harm – without the use of words. ANSI Z535.3 Criteria for Safety Symbols defines a safety symbol as a configuration that includes an image, with or without a surround shape, that communicates a message – usually a hazard or precaution to avoid a hazard – without words.
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ECG susceptibility to Gameboy™, iPod Nano™, cellphones, etc.

This experiment investigates the susceptibility of an ECG machine to emissions from unintentional emitters such as Gameboy™, iPod Nano™, and intentional emitters such as a Cell Phone, Portable 2.4GHz Phone, Portable 5.8GHz Phone, and walkie-talkie. Experiments were conducted both in a “lab” and hospital environments. The authors demonstrate…

Interference causes poisoning of patient

European medical device regulations state mandatory limits at a distance of 10m, these measurements are performed in far field conditions. However, in many medical scenarios it is difficult to avoid the presence of EMI sources too close to sensitive equipment, and this situation is…

Upcoming Events
April 5
Smart Grid EMC Standards

April 11-12
AMTA and Seattle IEEE EMC Chapter Regional Event

April 11-14
Applying Practical EMI Design & Troubleshooting Techniques

Advanced Printed Circuit Board Design for EMC + SI

Mechanical Design for EMC

April 13-14
Principles of EMC

April 15-16
Applied Measurement Uncertainty for Testing Laboratories

April 16-19
A2LA Annual Conference

May 1-3
2023 IEEE International Symposium on Product Compliance Engineering

May 16-19
Applying Practical EMI Design & Troubleshooting Techniques

Advanced Printed Circuit Board Design for EMC + SI

Mechanical Design for EMC

May 16-17
EMC and Compliance International Exhibition and Training

May 22-25
2023 Joint Asia-Pacific Symposium on EMC (APEMC) and International Conference on EMI & C (INCEMIC)

May 22-25
2023 International Instrumentation and Measurement Technology Conference (I2MTC)

May 23
Annual Chicago IEEE EMC MiniSymposium

May 25
EMC Fest 2023

June 11-16
IEEE International Microwave Symposium (IMS)

June 20-22
Sensors Expo & Conference

Always check the event website for current information.
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