The AM-400 from Com-Power Corporation is an antenna mast well suited to making EMC measurements in an OATS (open air test site) or in test chambers. The height of the antenna can be varied from one to four meters during measurement as required by commercial EMC specifications. The mast is constructed using fiberglass tubes and grating material. These were chosen because they … [Read more...]
Antennas
- Free EMC Formula & Equation Calculator: Antenna Factor and Gain Calculations
- Free EMC Resource: How to Use Antenna Factors
- Free Antenna Selection Guide: Antenna Selection by Application
- Free PDF Download: RF Conversion Formulas by AH Systems
- Free PDF Download: AH Systems Product Catalog by AH Systems
Portable, Folding Biconical Antenna Performs Site Attenuation Measurements
The SAS-542 Folding Biconical Antenna from A.H. Systems was the first EMC antenna designed for portable compliance testing applications. Product features include a frequency range of 20 MHz to 330 MHz, maximum continuous power of 1 watt, impedance of 50 Ω, and a maximum radiated field of 2 V/m. These antennas are individually calibrated (1-, 3- and 10-meter calibration … [Read more...]
Understanding Shielding Effectiveness of Materials and Measurements in the Near-Field and Far-Field
When we treat the shielding effectiveness measurement with a uniform field, the results are similar for both near and far fields. Kermit O. Phipps and Philip F. Keebler EPRI EMC Laboratory, Knoxville, TN, USA INTRODUCTION Traditionally Schelkunoff’s shielding effectiveness equation is used universally in teaching and practice throughout the EMC community as a whole. In this … [Read more...]
Luebbers Steps Down at Remcom
Dr. Raymond Luebbers, CEO, president and co-founder of Remcom, the well known EM and antenna simulation software firm, has retired. Dr. Stephen Fast, former executive VP has assumed his duties. Dr Luebbers founded Remcom in 1994 while a professor at Pennsylvania State University. His co-founders were two of his graduate students, Scott Langdon and Christopher Penney. Dr. … [Read more...]
Simulation of In-Vehicle Human Exposure to Electromagnetic Fields from On-Board Transmittors
Numerical models can provide data from enormous numbers of points and for a number of human simulants Alastair R. Ruddle, PH.D., MIRA Limited Nuneaton, UK On-board transmitters are already commonly encountered in the vehicle environment; typical examples include mobile telephones, Bluetooth systems, and communications equipment used by the emergency services and armed forces. … [Read more...]
Antenna Manufacturer Includes 60-Ft. Tapered Anechoic Chamber in New Test Facility
Dielectric Communications, a manufacturer of broadcast antenna systems has included new state-of-the-art test equipment in its new high-performance testing facility in Raymond, ME. With its new facility, company test personnel hope to expand their RF testing capabilities and to achieve full isolation of the variables that affect the performance of its antennas, filters, and … [Read more...]
On-site EMF Testing of an Emergency Network Communications Vehicle
Thorough testing requires taking measurements both inside and outside the vehicle. David A. Case, Jaime McLain and Murry Gavin Cisco Systems, Inc., Richland, Ohio, USA Experienced compliance test personnel are familiar with the usual spate of RF issues. Tasks range from performing MPE (maximum permissible exposure) studies and SAR (specific absorption rate) testing to … [Read more...]
An Emission Measurement System for the Twenty-First Century Based on Time-Domain Measuring Methods
More information and reduced measurement time can significantly improve the quality of emissions testing. Stephan Braun and Peter Russer Institute for High Frequency Engineering, Munich University of Technology, Munich, Germany For some time, measurements of electromagnetic interference have been carried out by super-heterodyne receivers operating in the frequency domain. … [Read more...]
Reverberation Chamber for EMC Testing
The reverberation chamber provides the most realistic simulation/equivalency for electronics functioning within a cavity. Er-Ping Li and Xing-Chang Wei Electromagnetic Labs, Institute of High Performance Computing, Singapore INTRODUCTION The problem is familiar, but growing. The widespread and ever-growing use of electronic devices with high-speed components increases the … [Read more...]
Antenna Fundamentals
A proper understanding of antennas requires familiarity with electromagnetics, circuit theory, electronics and signal processing. Candace Suriano, Ph.D., Suriano Solutions John Suriano, Ph.D., Nidec Motors, Auburn Hills, MI, USA Tom Holmes, Agilent Technologies, Tipp City, OH, USA Qin Yu, Alcatel-Lucent, Columbus, OH, USA How does an antenna pick up a signal and convert it to … [Read more...]