Electronics Protection - Winter 2014 - (Page 22)

EMI/EMC/RFI Patent Awarded to Select-A-Shield RF Shielded Room Closure System Select Fabricators, Inc. newly patented, non-radiating door closure system is part of the complete RF/EMI shielding design for SelectA-Shield portable test enclosures. Focused on minimizing leakage, improving isolation as well as providing easy entry and exit, Select developed the patented (US Pat. No. 8,530,756) double door system. All 16 models of standard series 100 Select-A-Shield RF shielded portable enclosures as well as custom configured tent systems now include a standard size 40 by 54.5 inch double door, single magnet door system option. The double door, single magnet closure system can be specified to open in or out for ease of entry. A single strip of magnet along three sides of each door is lightweight, with a tight double seal and a lower threshold for improved access. This door system is an improvement over zippered or conductive hook and loop doors that take longer to open, may not be conductive and typically require higher thresholds. Select-A-Shield RF/EMI enclosures are constructed with RoHS compliant, durable, lightweight, silver/copper/nickel, NovaSelect fabric; Select's highly conductive material. This flexible material delivers maximum attenuation averaging -85 dB in shielding effectiveness in the range of 30 MHz to 1 GHz and an average of -80 dB of shielding effectiveness in the range of 1 GHz to 10 GHz. Made of thermoplastic material, the flexible magnets can be bent and flexed without affecting their performance and magnetized in a matched pole configuration to provide even alignment when closing the doors. The magnets are encased in NovaSelect material along three sides of the doors and are easily opened and closed with user-friendly alignment tabs. Using NovaSelect material, with a surface resistivity of 0.006 ohms-per-square, as the door seal between the magnets provides a very effective door closure system with repeatable shielding performance. Select Fabricators also currently offers a patent-pending single door/double magnet design. "We suggest door closure systems based on customer requirements," said Gary Winch, COO and patent co-inventor. "The need for enhanced shielding effectiveness is often met using a double wall layer and newly patented double door design. Testing has shown a double door, double wall layer design yielding -88 dB at 1 GHz, and an average of -78 dB from 150 kHz to 18 GHz." ARC Technologies Launches AC2ES ARC Technologies, Inc. has launched AC2ES (ARC clear conductive electromagnetic shielding). ARC Technologies' AC2ES material offers flexibility and versatility for applications requiring transparent EMI shielding materials. These ultrathin, flexible films use the latest nanotechnology to provide high levels shielding effectiveness while remaining optically clear, for use in commercial and industrial electronic applications 22 Winter 2014 * www.ElectronicsProtectionMagazine.com requiring transparent solutions for shielding materials. The AC2ES materials can be flat or shaped into three-dimensional (3D) forms, and are available in sheets or rolls with conductivity between 0.1 and 6.0 Ω/square, 70 percent to 80 percent transparency, and shielding effectiveness (SE) of 20 to 40 dB from 2 to 18 GHz. AC2ES shielding materials are suited for a range of applications requiring shields with optical clarity including transparent windows, transparent heaters, RFID tags, wearable electronics, thin film devices and transparent antenna patterning. The materials can even be transferred to glass and other substrates for use as transparent antennas in wireless electronic products, including in Bluetooth, cellular and near-field-communications (NFC) devices. The AC2ES shielding materials provide high SE levels up to 18 GHz and are available in 100-μm thin-film form. The secret of these materials is in the use of highly conductive nanoparticles that are 5 or 10 μm thick and almost invisible to the eye. This achieves high levels of EMI shielding while remaining optically transparent. Single Stage EMI Filter Expands Custom Military Filter Product Line Astrodyne Corp. has expanded its custom military filter product line with single stage EMI filter. The LCR F19734, designed exclusively for use with the Excelsys Technologies' power supplies, helps bring systems in compliance with MIL-STD 461F (a US military standard set to test for electromagnetic compatibility), as well as CE101and CE102 conducted emission standards under various loads. The filter was created to improve conducted emission capability that assists designers in developing products that meet these standards. The LCR F19374 is part of Astrodyne's family of custom military EMI filters. These include standard off-the-shelf EMI and RFI filters as well as custom filters and suppression components. LCR offers AC and DC EMI filters and RFI filters for all current and voltage ratings, for 50/60 Hz and 400 Hz applications. LCR also offers aerospace, Tempest and military EMI filters and RFI filters that can be supplied with various levels of transient voltage protection (EMP, HEMP and HERF). The LCR F19374 has an operating frequency of DC - 400 Hz, a rated voltage range of 85 to 265 VAC, 300 VDC, as well as a current rating of 10 Amps. This single stage filter also offers several I/O terminations for design flexibility, including quick disconnect tabs, threaded studs, and MIL connectors. Follow us on Twitter @EPMagazine1 http://www.ElectronicsProtectionMagazine.com

Table of Contents for the Digital Edition of Electronics Protection - Winter 2014

Editor's Choice
EMI Compliance: Choosing the Right Shielding and Gasketing
Thermal-Fluid Modeling for Flat Thin Heat Pipes/Vapor Chambers
Increase Rack Cooling Efficiency and Solve Heat-Related Problems
Seven Essential Cabinet Design Considerations for Protecting 19 Inch Electronics
A Better Alternative to Heat Pipes: Integrating Vapor Chambers Into Heat Sinks
Common IP Testing Failures and How to Avoid Them
Enclosures
EMI/EMC/RFI
Thermal
Power
Hardware
Contamination
Industry News

Electronics Protection - Winter 2014