Zeus PTFE/FEP Dual-Shrink® tubing is constructed with an exterior of heat shrinkable PTFE and an inner layer of FEP. The PTFE outer layer shrinks tightly over inserted parts while the FEP melts and flows into a solid or near-solid encapsulation. The fit is so tight it can withstand the most severe stresses involving pull or vibration. Dual-Shrink® tubing is designed to provide … [Read more...]
New Family of Electrically Tuned Polymers for Composites Applications Developed
ARC Technologies of Amesbury MA has teamed with CompositeTechs LLC of Amesbury MA to promote development of a new series of electrically tuned polymer formulations for the plastics and composites industries. These general formulations can be customized to meet the processing and performance specification requirements for extrusion, injection molding, thermoforming, and … [Read more...]
An Engineering Ethics Question for Today
I’ve been presenting a seminar on engineering ethics to students in the Electrical Engineering Department at Washington State University for a number of years. I’ve started off with a video of the Challenger explosion and the questions leading up to it as expressed by Roger Boisjoly, a Morton Thiokol engineer. Roger Boisjoly had studied data showing that the field joint … [Read more...]
New Low-PIM Plenum-Rated Cable Assemblies Deliver Maximum PIM Level of -155 dBc
Pasternack, a leading provider of RF, microwave and millimeter wave products, has launched a new line of low-PIM, plenum-rated SPP-250-LLPL cable assemblies for use in wireless infrastructure. Typical applications include distributed antenna systems (DAS), indoor wireless systems, multi-carrier communication systems and PIM testing. Pasternack’s 36 new low-PIM jumper cables … [Read more...]
Brochure Describes Photo Etching of Thin Metal Parts, Board Level Shielding and Flexible Circuits
Capabilities brochure describes how the photo etching process provides Tech-Etch the flexibility to produce prototype quantities and large production runs of intricate parts for many diverse mechanical and electrical applications, without the high cost and long lead times of hard tooling. Custom light-gauge parts are produced with intricate patterns, precise tolerances and … [Read more...]
Selecting the Proper EMI Filter Circuit For Military and Defense Applications
Introduction Insertion loss, the term used to express a filter’s ability to reduce or attenuate unwanted signals, has traditionally been measured in a 50 ohm source and 50 ohm load impedance condition, as standardized in MIL-STD-220. In this matched 50 ohm impedance condition, various types of filter circuit configurations, single capacitor, “L’s”, “PI’s”, and “T’s”, will … [Read more...]
EMP/HEMP Filter Meets Mil-STD-188-125, E1 & E2 Pulse Test Requirements
API Technologies’ model 52-1700-XXX High-altitude Electromagnetic Pulse (HEMP) Filters are designed to protect sensitive electronics equipment during hazardous transient conditions. They are employed to absorb a potentially destructive overshoot voltage. Under normal operating conditions, the suppressor circuit exhibits high off state impedance that appears transparent to … [Read more...]
More Applications Added to Popular Selective Radiation Meter
Narda Safety Test Solutions has added the LTE-TDD option to the latest generation of its highly specialized SRM-3006 Selective Radiation Meter. This puts the finishing touch to this frequency-selective handheld field strength measuring system, which has long been the benchmark device for rapid, reliable, standard-compliant safety assessments. The code-selective measurement … [Read more...]
New Solid State Broadband E-field Sources Introduced
AR recently introduced a set of new solid state broadband E-field sources with integrated horn antennas designed to replace traveling wave tube (TWT) amplifiers for immunity testing. The new E-filed sources are controlled by a master controller. There are two frequency ranges; 18 to 26.5 GHz and 26.5 to 40 GHz. Two field levels are available; 20 V/m and 50 V/m (both measured at … [Read more...]
Simulating EM Shielding for Aeronautical Applications
The airframe of an aircraft can provide some measure of shielding against high-intensity radiated fields (HIRF), but this is compromised by doors, windows, seams, access panels and components interfaced to the airframe such as antennas used for communication and navigation. Composite materials are increasingly used in aeronautical applications due to their relatively light … [Read more...]
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