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...]
Antennas
- Free EMC Formulas & Equations: dBm, Volts, Watts Conversion
- Free EMC Formulas & Equations: Antenna Factor and Gain Calculations
- Free EMC Resource: VSWR vs. Return Loss Cheat Sheet
- Free Article: The Importance of Antenna Beamwidth in RF Testing
- Free Article: 4 Reasons To Get A Bilogical Antenna First For Device Testing
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...]
Measuring and Managing Electromagnetic Interference: Selecting the Right Antenna for Your E3 Program
Philip F. Keebler and Kermit O. Phipps EPRI Solutions, Knoxville, TN Bradford R. Connatser WriteNow Communication, Knoxville, TN Introduction What is an E3 program? Outside of the military environment, the National Aeronautical Space Administration (NASA), and the telecommunication industry, the study of electromagnetic environmental effects (E3) and spectral management … [Read more...]
Practical Considerations in Upgrading RF Immunity Test Systems to 6 GHz
Pat Moore, MILMEGA Ltd., UK Introduction With the recent release of IEC61000-4-3 Edition 3, many EMC test houses are actively researching the availability of equipment capable of meeting the testing demands presented by the new 6 GHz upper frequency limit. The conventional solution offered by EMC equipment suppliers has several major disadvantages, particularly as regards … [Read more...]
Initial Evaluation of Proposed >1-GHz Site Validation Standards
All methods for validating a test site must provide the same unambiguous result indicating that the site meets or does not meet requirements. Ken Hall Hewlett Packard, Roseville, Calif., USA Site validation above 1 GHz has traditionally been done by extending the ANSI C63.4 Normalized Site Attenuation (NSA) requirements to the upper frequency a customer might request for … [Read more...]
Recent Improvements on Dual-Ridged Horn Antennas
Improved gain and pattern behavior of these horns makes them ideal for use in other applications outside of EMC. Vicente Rodriguez ETS-Lindgren, Cedar Park, TX, USA For over 40 years dual-ridged horn antennas have been the most common broadband horn used in EMC applications. These antennas are common in the EMC community in their 200-MHz to 2-GHz version and the 1-GHz to … [Read more...]