Author Steven Weir Abstract While voltage regulator vendors often suggest generic filter capacitors for use with their devices, these recommendations are often both vague and fail to take into account the effects of the larger PDN bypass network on VRM response. Filter Capacitor Networks Figure 1 depicts a generic PDN conceptual model. Moving from left … [Read more...]
Simulation of GHz Insertion Loss Components; Cross-Section Geometry Influence on Conductor Loss
Tracey Vincent Application Engineer, CST ABSTRACT To attain realistic estimations of simulated insertion loss, all insertion loss components need to be considered and accounted for. In particular, the dielectric and conductor loss components can require careful material parametrization in order for 3D simulated loss to be realistic. An overview of these parametrizations is … [Read more...]
The Electromagnetic “Triple Threat” and the Critical Infrastructures Revisited
Author Dr. William A. Radasky, Ph.D., P.E.; wradasky@aol.com; Metatech Corporation Introduction In 2009 this author first used the term “triple threat” to describe three severe electromagnetic (EM) threats and the protection methods available to protect commercial installations from the high-altitude electromagnetic pulse (HEMP) produced from a nuclear detonation in space, the … [Read more...]
Spectrum Supportability Risk Assessments
Author Brian Farmer The Problem Early consideration of spectrum supportability in spectrum dependent (S-D) system acquisitions is a fundamental criterion that must be satisfied before the DoD develops and fields communications-electronics (CE) equipment and related weapons systems. Development or acquisition of systems that meet operational requirements, but fail to … [Read more...]
Spread Spectrum Clock Generation – Theory and Debate
Kenneth Wyatt Wyatt Technical Services LLC History of Spread Spectrum Figure 1 – Actress, mathematician and inventor, Hedy Lamarr. Courtesy of http://www.hedylamarr.com During WW2, the U.S. Navy was having problems with radio-controlled torpedoes that were being jammed by high-strength RF signals tuned to the same frequency as the transmitting radio. In … [Read more...]
Why Should We Consider EMC (and Safety) Early in the Design Stage?
J M Woodgate BSc(Eng) CEng MIET MIEEE FAES J M Woodgate and Associates, Rayleigh, England A short history of a half-million dollar loss April 2 2013 From: Compliance (JH) To: MJ54 Team Leader (BB) Subject: MJ54 tests Not good news. Model for testing (MFT) failed several EMC tests, and there are safety issues as well. Details in a following message. … [Read more...]
EMC – Grounding on Automation and Control Systems Applications to Eliminate Electromagnetic Interference in Industrial Plants
Author Roberto Menna Barreto QEMC - Engenharia, Qualidade e Compatibilidade Eletromagnética Ltda., Rio de Janeiro, Brazil menna@qemc.com.br Summary The preservation of signals and equipment are generally characterized by the term Electromagnetic Compatibility (EMC), whose essence will translate in its own grounding system. The proper EMC improvement in the … [Read more...]
Special Feature: Women in EMC
By Belinda Stasiukiewicz Editor, Interference Technology Aspire. Advance. Achieve. This is the slogan of the Society of Women Engineers. The organization, founded more than 60 years ago, is one of the leaders in the push to increase female interest in engineering. The society hopes that its members, and all female engineers in general, will aspire to become successful … [Read more...]
