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October 2019

Balanced-Unbalanced Antenna Structures and Baluns

This article explains the operation of a balun that transforms an unbalanced antenna structure into a balanced one.

De-risking Resonances in Single Conductor Structures, Such as “Ground”

In this article, the author will identify two major types of single-conductor structure resonances and describe some case studies for both. He will then describe how design projects can quickly and easily be ‘de-risked’ from the possibilities of suffering either type of resonance by the use of low-cost field and circuit simulators and/or low-cost bench testing on physical ‘mock-ups’.

Lossy Material Quiets Leaky Air Vents

This article presents the results of experiments to measure the effectiveness of lossy material in reducing RF emissions from perforated air vents such as those commonly used on computer enclosures. The results show good performance compared to those with conventional metal vents.

The EU Radio Equipment Directive: What Are a Manufacturer’s Obligations?

The EU’s Radio Equipment Directive (RED) places various obligations upon manufacturers of in-scope equipment. Some of these obligations are the same as those found in the Low Voltage and EMC Directives, but others are unique to the RED and can be complex and relatively demanding to comply with. This article identifies and discusses those obligations while suggesting that manufacturers need to continually monitor developments in legislation and standardization.
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Hazardous Substance Restrictions …And Why They Are Restricted

The use of chemical substances and their potential impacts on human health and the environment is a concern world-wide. This paper looks at substances and substance restrictions, why they are restricted, and how they affect the safe use and disposal of electrical, toy, and medical products.

ESD Device Modeling: Part 1

ESD models may be used for simulating on-chip integrated circuits or system (board) level circuits with discrete electronic components like diodes, TVS devices, and bipolar junction transistors (BJTs).

Regulatory Compliance Labeling and Symbols

Between WEEE, RoHS, REACH and other environmental directives, regulatory compliance labels for handling and disposing of certain products is less intuitive than it seems.

Banana Skins – October 2019 (#211-218)

We are proud to carry on the tradition of sharing Banana Skins for the purpose of promoting education for EMI/EMC engineers.
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Issues & Answers: Testing Challenges for Electric Vehicle Testing

Standardization for EV testing continues to evolve. Tim Horacek, Product Manager of AMETEK CTS discusses trends, challenges and development of testing standards for electric vehicles.

Let’s Talk About Flexible Absorber Sheets

Let's talk about flexible absorbing materials used for radio frequency (RF) noise suppression and EMC shielding in electronic products such as cell phones, MP3 players, and rugged handheld devices.

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