Surface cleanliness is critical to good coating adhesion for any coating process Rocky R. Arnold, Ph.D. WaveZero, Inc. Sunnyvale, CA Many medical product manufacturers achieve electromagnetic compliance (EMC) for their electronic devices by coating the inside of the plastic enclosures with a conductive material; for example, silver-copper particle loaded paint, electroplated … [Read more...]
Resistor-Capacitor Device Provides ESD Protection for 3G LCD Screens
The EClamp237xK family of resistor-capacitor (R-C) protection devices from Semtech Corporation safeguards lines for cellular frequencies between 1.8 GHz and 2.5 GHz, the data rates required by the latest generation of high-resolution LCD screens used for visually oriented 3G handsets. This series includes the four-line EClamp2374K, the six-line EClamp2376K and the eight-line … [Read more...]
NIST Develops Electromagnetic Phantom for Testing Metal Detectors
The National Institute of Standards (NIST) has developed an electromagnetic “phantom”—a carbon and polymer mixture that simulates the human body—that is intended to improve and standardize the testing of walk-through metal detectors. Currently, detectors are tested using human volunteers carrying various metallic objects or pieces of plywood on which the objects are mounted. … [Read more...]
Military COTS Filter Provides EMI Filtering & Transient Protection
The M-FIAM7 from Vicor is a DC front-end module that provides EMI filtering and transient protection. The M-FIAM7 allows designers using Vicor’s 28-V DC/DC V•I Chip modules to meet conducted emission/conducted susceptibility per MIL-STD-461E; and input transients per MIL-STD-1275A/B/D, MIL-STD-704A-F, and DO-160E. The M-FIAM7 accepts an input voltage of 14 to 50 VDC and … [Read more...]
NASA’s Lunar Orbiter Passes EMC and Other Environmental Testing
NASA’s Lunar Reconnaissance Orbiter (LRO) successfully passed EMC testing at the Goddard Space Flight Center in Greenbelt, MD. The orbiter will carry seven instruments to provide scientists with detailed maps of the lunar surface to increase our understanding of the moon’s topography, lighting conditions, mineralogical resources, and natural resources. The spacecraft will spend … [Read more...]
FCC Okays Test of Jamming Devices in DC Correctional Institution
In yet another development regarding the controversy of jamming calls placed by inmates on contraband cell phones, the Federal Communications Commission has granted the District of Columbia Department of Corrections permission to conduct a test on Thursday, January 8, 2009. Despite the legal ban on jamming radio waves within the United States, an FCC official characterized this … [Read more...]
Semi-Anechoic Chamber Expedites Avionic EMC Testing
A semi-anechoic chamber has been completed by ETS-Lindgren at Airbus in Hamburg, Germany. Valued at over €500,000, the chamber measures 12 x 6.7 x 6.5 meters and features an 8- x 4- x 2.9-meter control room. The chamber is to be used primarily for the EMC testing of electrical and electronic components and systems in aircraft. The new indoor, in-house test environment ensures … [Read more...]
Different Methods of Connecting an SPD to an Electrical Distribution Network
The way in which SPDs are connected can have a large impact on the overall protection provided Bryan Cole Introduction Surge protective devices (spds) or transient voltage surge suppressors (TVSS) are used to reduce the impact of overvoltage transients on the electrical distribution networks found in various industries. Of course, the efficacy of these devices will affect the … [Read more...]
Reducing Ground Noise Emissions in Critical Electronic Equipment and Facility Ground Systems to Help Prevent Conducted EMI Problems
Many EMI problems involve emissions that circulate through electrical conductors within a facility and within equipment Philip F. Keebler and Kermit O. Phipps EPRI Knoxville, Tennessee Background The electromagnetic environment includes the areas inside and outside electrical and electronic equipment. The areas inside equipment include unused air spaces, circuit boards, cables … [Read more...]
Will EM, Electrostatic, Thermal, or Osmotic Forces Propel Tiny Robots?
Scientists at the Micro/Nanophysics Research Laboratory at Australia’s Monash University have developed tiny nano-bots capable of moving through the human blood stream. According to research team leader Prof. James Friend, “ Serious damage during minimally invasive surgery is, however, not always avoidable, and surgeons are often limited by the width of a catheter tube, for … [Read more...]
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