The ATI 3-layer filters from Alco Technologies is a superior dust filtration, EMI shielding filter for minimum air flow requirements. Aluminum extruded profiles surround three layers of aluminum screen and are welded in place. Three layers of wave-formed aluminum wire screen, each with a decreased depth are layered together in an arrangement resembling the look of a continuous … [Read more...]
Military
Silicone Gasketing Material Meets Requirements of MIL-DTL-83528
A family of conductive silicon elastomers from SAS Industries has been crafted for applications that require extremely high shielding effectiveness, environmental sealing, reliability, and durability. These elastomers are a unique composite of high quality silicone and conductive microscopic particles manufactured to strict formulations to yield gasketing materials that meet … [Read more...]
Crucial RF Shielding Selection Considerations
Gary Fenical Laird Technologies INTRODUCTION Designers must attenuate RF signals for various reasons. Since a product cannot be legally marketed unless it meets EMC requirements, designers must curtail RF signals above a certain limit. It is important to consider RF shielding materials at the beginning of a design project because choosing the correct kind of shielding upfront … [Read more...]
DARPA Seeks to Use EM Waves to Extinguish Fires
DARPA, the Pentagon’s Defense Advanced Research Project Agency, has announced a new research program into “Instant Fire Suppression.” The agency noted that “Fire especially in enclosed military environments such as ship holds, air craft cockpits, and ground vehicles, continues to be a major cause of material destruction and loss of warfighter life. Essentially, there have been … [Read more...]
New EMI Filters Comply with DOD’s COTS Directive
The new VPT10-28 (10 A) and the VPT2028 (20 A) have been added to its COTS product line by VPT, Inc. These filter modules provide compliance to MIL-STD-461 C/D/E for conducted emissions in military and avionics DC power systems. Both devices fulfill the DOD’s COTS (commercial-off-the-shelf) directive in terms of cost and stringent military and avionics performance standards. … [Read more...]
Extensive Line of Custom EMI Filters Available
WEMS EMI/RFI Filter Division designs and manufactures high reliability input, output, power line, and signal filters intended for military, aerospace, and high end industrial applications. WEMS services include filter circuit design and analysis, filter packaging and layout, prototype/first article, EMI test assistance, environmental tests, source control drawings, acceptance … [Read more...]
Spectrum Aeromed Module Passes EMI Testing and Wins Military Air Worthiness Award
North Dakota-based Spectrum Aeromed has announced that its ambulance module was subjected to exhaustive testing requested by the U.S. Air Force. The Spectrum Aeromed ambulance module was subjected to EMI, electrical safety, severe vibration periods, altitude changes, rapid decompression, and environment testing. Following this testing, Spectrum Aeromed equipment was awarded … [Read more...]
Air Force Looking for Customized Van for EMC Lab
The U.S. Air Force Air Education and Training Command at Keesler AFB in Mississippi is looking for a Dodge Sprinter Van converted for use as a mobile EMC lab. The solicitation calls for a work area, 42 ft mast, equipment racks for test equipment and an AC power generator. Incorporated into the solicitation is a Statement of Need that provides information on specifications of … [Read more...]
Active Filter Protects DC-DC Converters in Harsh Electrical Environments.
The DSF500 from XP Power is a 500-W active filter unit for use in harsh electrical environments. It has been crafted to protect DC-DC converters from the surges, spikes, and ripples that are typically found within the electrical system of any military platform—such as aircraft or vehicles. This filter complies with MIL-STD 1275A-D without the incorporation of any additional … [Read more...]
National Security Agency Declassifies Report on TEMPEST
On April 29, 2008, the National Security Agency declassified a report titled, "TEMPEST: A Signal Problem--The story of the discovery of various compromising radiations from communications and Comseq equipment." The story begins during World War II when a researcher noticed that every time a Bell Telephone encrypting machine encrypted a letter, a spike appeared on an … [Read more...]
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