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Interference Technology

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Antennas

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...]

New PC Software For EMC Pre-compliance Testing Announced

 

Saelig Company, Inc. announces the availability of the TekBox EMCView Pre-compliance Testing Software. This PC-compatible software simplifies the process of EMC pre-compliance testing of radiated and conducted emissions. EMCView complements an emissions test setup of a spectrum analyzer, an LISN (Line Impedance Stabilization Networks) and an EMI-quiet TEM (Transverse … [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...]

Troubleshooting Radiated Immunity for Medical Products – Case Study

 

Introduction Companies making medical products have much more stringent requirements now that the new IEC 60601-1-2 (Edition 4) became effective June 17, 2017. One of the many changes included increased radiated immunity requirements in several specific wireless and communications bands (Table 1). Highlights of all the changes are included in Interference Technology’s free … [Read more...]

New Solid State Broadband E-field Sources Introduced

 

AR recently introduced a set of new solid state broadband E-field sources with integrated horn antennas designed to replace traveling wave tube (TWT) amplifiers for immunity testing. The new E-filed sources are controlled by a master controller. There are two frequency ranges; 18 to 26.5 GHz and 26.5 to 40 GHz. Two field levels are available; 20 V/m and 50 V/m (both measured at … [Read more...]

New Series of Vector Network Analyzers Released

 

Legendary support and quality meet ease-of-use and affordability. The Tektronix TTR500 Series 2-port, 2-path vector network analyzer is our latest breakthrough – an unmatched combination of measurement performance and convenience at 40% lower price than leading benchtop alternatives! It’s used to measure filter and antenna response, as well as shielding effectiveness, as … [Read more...]

AR/RF Microwave Instrumentation Receives Accreditation From A2LA

 

AR RF Microwave Instrumentation is pleased to announce that its calibration lab has achieved accreditation to ISO 17025:2005 by the American Association for Laboratory Accreditation (A2LA). This important certification is the result of a thorough assessment and extensive review of AR’s quality management system and its competence to perform calibrations on many AR-designed and … [Read more...]

New Dual-Ridge Horn Operates from 18-40 GHz

 

MVG is proud to introduce the Dual-Ridge Horn (18-40 GHz), the new addition to the EMC Antenna Family! The EH1840 antenna is a single, linearly polarized that combines stable gain performance, low VSWR, and excellent cross-polar discrimination with wide band frequency operation. The unique horn design suppresses any possible excitation of higher order modes in the … [Read more...]

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