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...]
Military
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...]
Electronics Experts Discuss EMI in Sudden Acceleration Incidents
When it comes to sudden acceleration, automakers claim absence of a detectable fault proves absence of design defect. Not true, said a panel of electronics experts who gathered Tuesday at the National Press Club in Washington, D.C., to demystify some of the electronics issues they say are likely responsible for Toyota – and other automakers -- sudden acceleration … [Read more...]
Selecting the Right RF Coaxial Connector and Cable
RF coaxial connectors and cables provide a vital link within the communications, EMC test and measurement, commercial and military fields. Although there are a variety of RF coaxial connectors, they are characterized by a few key parameters. An article in Dataweek shows how these characteristics, along with connector durability and cost, must be considered in light of the … [Read more...]
Electronics Experts Debunk Toyota Claims
When it comes to sudden acceleration, automakers claim absence of a detectable fault proves absence of design defect. Not true, said a panel of electronics experts who gathered Tuesday at the National Press Club in Washington, D.C., to demystify some of the electronics issues they say are likely responsible for Toyota – and other automakers -- sudden acceleration … [Read more...]
Contact System Available with Crimp, PCB Mount Terminations
Positronic’s new PosiBand contact system is now qualified to SAE AS39029. This specification covers a wide range of high reliability crimp connector contacts for use in military and aerospace applications. The PosiBand system is suitable for any application requiring rugged, high reliability connectors, and is available with crimp and PCB mount terminations, including … [Read more...]
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