TDK Corporation announced the expansion of its lineup of chip varistors for automotive applications. The AVRH series offers a maximum operating voltage of 19 V to 70 V and a capacitance ranging from 4.7 to 50 pF. The miniature voltage protection device is available in IEC case 1005 (EIA 0402) with compact dimensions of just 1.0 mm x 0.5 mm x 0.5 mm. The high reliability AVRH … [Read more...]
Determining Semi-Anechoic Chamber Resonance as a Source of Radiated Emission Measurement Variation Between Chambers and Comparing to OATS Measurements
INTRODUCTION This article describes the lack of an acceptable correlation between anechoic chamber and open field test site radiated emission measurements, which were described in reference 1 in 2000, as well as a lack of correlation between chambers. It was found that emission measurements, which were over the limits in one facility, would pass in another. The lack of a … [Read more...]
EMC Radiated Emission Measurements at 1/3/5/10/30 Meters
INTRODUCTION There are two principal types of emission measurements in the world of electromagnetic compatibility, conducted emission and radiated emission. The conducted emission measurements are either a voltage-capacitive tap type of measurement (typically on a power line) or they are a current-clamp type of measurement (typically on a signal line). Radiated emission … [Read more...]
Resilience is Key to the Connected and Autonomous Revolution
INTRODUCTION Connected and autonomous vehicles have long been hailed as the answer to safe transport. Around 1.25 million people die in road traffic accidents worldwide each year according to E&T– and driver error accounts for over 90 per cent of those deaths[1]. In theory, the removal of the driver as the lead decision maker for vehicle control should reduce this number, … [Read more...]
PLL Synthesizers in Compact Coaxial Packages Cover Bandwidths Ranging from 25 MHz to 27 GHz
Fairview Microwave Inc., a supplier of on-demand microwave and RF components, has launched a new line of USB-controlled, phase locked loop (PLL) frequency synthesizers. In RF and Microwave communications systems where signal integrity is priority, PLL synthesizers offer superior frequency stability and accuracy with exceptional phase noise characteristics that allow components … [Read more...]
New Film Capacitors: Compact Motor Run Capacitors for 100 °C
TDK Corporation presents the new B32355C* series of EPCOS MotorCap™ motor run capacitors, which are designed for a high continuous operating temperature of 100 °C. They are based on a metalized polypropylene film, feature self-healing properties, and conform to Safety Class S3 as specified in IEC60252-1. These robust capacitors have a rated voltage of 400 V AC at 50/60 Hz. The … [Read more...]
New Small Coupled Power Choke Released
WE-DPC HV (Double Power Choke High Voltage) is a magnetically shielded, SMD coupled power choke with two identical windings and a high isolation voltage of 1.5 kV. It is the smallest product of its type in the Würth Elektronik eiSos portfolio. With this power choke in a 5030 package, customers can attain a 40 percent lower DC resistance than products on the market. WE-DPC HV … [Read more...]
FCC’s New Equipment Authorization Rules – First Report and Order FCC 17-93
The FCC announced New Equipment Authorization Rules in the First Report and Order FCC 17-93 on July 13, 2017, and followed this on July 20 with a live webcast of a panel discussion featuring the FCC OET and lab division Chiefs providing details of the changes and answering manufacturer questions. Highlights of the First Report and Order This report and order streamlines … [Read more...]
Book Review: Foundations of Electromagnetic Compatibility (Adamczyk)
OK, this is not a book for the faint-hearted. Bogdan Adamczyk is a professor of engineering and the founder of the EMC Center at Grand Valley State University in Grand Rapids, MI. As such his recent book, Foundations of Electromagnetic Compatibility with Practical Applications (Wiley 2017, ISBN 978-1-119-12078-0) is crammed with derivations of basic electromagnetic … [Read more...]
Chip Fuse Protects Against Overcurrent and Excessive Ambient Temperatures
SCHURTER’s USN 1206 is designed to meet the ever-increasing challenges associated with packing density in power electronics. The new chip fuse offers temperature-sensitivity suitable for both overcurrent protection and protection against excessive ambient temperatures. The USN 1206 is not a pure thermal fuse, per se. It requires a current flow to blow, thus providing … [Read more...]
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