When correctly applied, real financial savings can be expected, along with a significant reduction in financial risks. Keith Armstrong, Cherry Clough Consultants, Stafford, UK Electronic complexity is increasing with no end in sight, increasing self-generated noise levels, while the feature sizes in silicon integrated circuits continue to shrink, making them emit more noise … [Read more...]
Military
2010 Update on IEMI and HEMP
INTRODUCTION It has been three years since the state of the art dealing with IEMI and HEMP has been updated in the Interference Technology Annual EMC Guide in 2007 [1]. A significant amount of work has been accomplished worldwide during this period. This paper will review significant special sessions and tutorials at International EMC Conferences, published papers and reports, … [Read more...]
COTS Alternatives to MIL SPEC Flexible Conduit Systems for EMI/RFI Containment
Applications, electrical and physical performance, termination and installation factors of shielded flexible conduits. Linda Sardone, Zero Ground Electronic solutions for military and government equipment and installations are expanding rapidly, and the need for supplemental shielding of cable runs via conduit is moving beyond traditional applications requiring MIL SPEC … [Read more...]
Halogen-Free Embedded Capacitance Material
Design engineers in the electronics industry who are seeking ways to improve power integrity and reduce electromagnetic interference while meeting halogen-free requirements now have a new solution to meet their needs. The 3M Electronic Solutions Division now offers halogen-free* versions of its Embedded Capacitance Material. 3M’s ECM is a thin, capacitor laminate, which can be … [Read more...]
Military Frequencies Interfere with Consumer Electronics
Interference from radio transmissions from Navy equipment in coastal neighborhoods of San Diego is suspected of causing problems for people trying to operate wireless devices to unlock cars and open garage doors. While not taking responsibility for the trouble, local Navy officials released a statement acknowledging that some military devices operate on the same frequencies as … [Read more...]
Choosing the Right Chamber for Your Test Requirements
Martin Wiles, Vince Rodriguez, ETS-Lindgren Developments within standards community has led to new chamber validation procedures above 1 GHz and alternative test methods using FARs. INTRODUCTION Anechoic chambers are used today for performing EMC measurements according to a variety of published EMC standards. There are many different fields of application, including … [Read more...]
Radiated Emission Measurements at 1/3/5/10/30 Meters
Daniel Hoolihan, Hoolihan EMC Consulting, Lindstrom, MN Trend shifts towards making measurements at antenna distances closer and closer to the equipment-under-test. INTRODUCTION There are two principal types of emission measurements in the world of electromagnetic compatibility: conducted emission and radiated emission. The conducted emission measurements are either a … [Read more...]
Egregious Errors in Electromagnetic Radiation Evaluation
Reasons for widely differing results in commercial radiated emission measurements. MIL-STD-461 RADIATED EMISSION MEASUREMENTS In 1967, the first version of MIL-STD-461 was introduced. Radiated emission measurements were allowed outside of a shielded room but due to the low levels of radiated emission limits, compared to an average ambient, measurements were invariably made … [Read more...]
Company Completes Rocket Test Plans EMI Test
After the recent completion of a tanking test of its Falcon 9 rocket, engineers at SpaceX, a space exploration technologies corporation, plan to perform electromagnetic compatibility tests with the Air Force while the Falcon 9 is on the pad. Testing of the rocket’s flight termination system is continuing. Before the Air Force approves the launch, SpaceX and the supplier of its … [Read more...]
Spotlight on Carbon Nanotube Technology
Meaningful advancement and delivery of novel materials such as carbon nanotubes is critical to state-of-the-art global defense, transportation and energy, experts say. Carbon nanotube technology (CNT) sheet material allows for easy incorporation into many fixed-form and flexible structures as a lightweight shielding alternative to conventional solutions currently in use. … [Read more...]
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