An innovative capacitor design can provide more RFI suppression in a substantially smaller package Steve Weir and James Muccioli X2Y Attenuators, LLC Erie, PA Instrumentation amplifiers are often employed in hostile noise environments. Sensor lead cables may pick up substantial RF radiation, particularly if they are long and/or not well shielded. When applied to the input of … [Read more...]
Thermal and EMI Shielding Boost Design Reliability
Optimal shielding helps meet the challenges of cramming maximum functionality into minimal PCB space. Paul J. Stus Laird Technologies St. Louis, MO Advances in the miniaturization of electronic components has intensified the need for manufacturers to solve multiple problems simultaneously and earlier in the design process. Solving the issues quickly and early in the design … [Read more...]
Cost Considerations for Selecting RF Shielding Materials
Taking these factors into account can save time and money. Gary Fenical, Laird Technologies Delaware Water Gap, PA RF shielding materials are an important consideration when designing electronic components because these materials help ensure that the electronic device will perform to its optimum functionality. Considering RF shielding materials at the beginning of the … [Read more...]
Telephonics Corporation’s Telecommunications System Passes EMI/TEMPEST Testing
Telephonics Corporation has announced that it has completed all qualification testing of its NetCom-V™ networked telecommunication system. NetCom-V can now enter full-scale production. The qualification test profile, conducted by certified independent testing laboratories included all environmental Military Standard (MIL-STD 810F), electromagnetic interference (MIL-STD 461), … [Read more...]
The FCC Dynamic Frequency Selection Test Procedure
David A. Case NCE, NCT On February 3rd 2006, after three years of work the US ITAC-R group addressing the development of the proposed US DFS test procedure to be used to certify products under FCC Part 15 was completed. This test procedure is milestone in verifying the sharing of the 5GHz band with Radiolocation systems. The work group consisted of Industry experts as well as … [Read more...]
Selecting a Radiated Emissions Test Site
Bob DeLisi Principle Engineer – EMC Underwriters laboratories Inc. Michael Windler Operations Manager NA EMC Underwriters laboratories Inc. Introduction Electromagnetic compatibility (EMC) testing and certification has become an integral part of product regulatory compliance. With the growing number of wireless communications devices being introduced into the RF … [Read more...]
Using A Transmission Line Model To Analyze Shield Current Distribution Resulting From Bulk Current Injection (BCI)
Arthur J. Glazar, Life Senior Member IEEE Background Radio frequency (RF) signal energy is normally confined to the interior of a coaxial cable. RF currents on the surface of a cable shield are undesirable and generally indicate a problem. Shield surface currents can occur as the result of conducted susceptibility (CS) or radiated susceptibility (RS). Whatever their … [Read more...]
Accuracy of Flickermeters – Round Robin Results
Have the new standards improved measurement accuracy? Ken Hall Hewlett Packard, Roseville, CA, USA This article presents the results of an inter-laboratory comparison of a flicker measurement system. In the process of evaluating replacement equipment that met the new international requirements of IEC 61000-3-2,1 harmonics, and IEC 61000-3-3,2 voltage fluctuations commonly … [Read more...]
Options for North American Product Compliance
Jack Black D.L.S. Electronic Systems, Inc. Wheeling, IL Manufacturers and distributors of electronic and electrical devices are required to meet various product safety and EMC standards established by the United States and Canada. They may be asked to show proof of compliance for these products by residential and workplace end-users. Today, there are multiple options for … [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...]
