A team of scientists from the University of Texas at El Paso have developed a way to control electromagnetic waves in three-dimensional space using plastic metamaterials created with a 3-D printer. “When you fold electromagnetics into three dimensions, the components interfere with one another, and it becomes a confusing electromagnetic mess where nothing will work—like when a … [Read more...]
Elephant in the Test Room #1 Continued – The ’Get Around’ Explained
Read other posts in the "Elephant in the Test Room" series here.Recap on this ThreadThe room: MIL-STD RF immunity testing – 1-18GHz 200v/mThe elephant: everyone in the room is aware that a significant fraction of the ‘calibrated’ 200v/m test field is actually created at the wrong test frequency.The culprit: Notoriously high ‘start of band’ harmonics produced by all octave band … [Read more...]
RFIDs Jam Mobile Signals in the Philippines
A telecommunications company serving metropolitan areas of the Philippines has uncovered the cause of poor cellular reception in major sections of Makati. Globe Telecom Inc. said last week that the radio frequency identification (RFID) systems installed as security measures in some upscale residential villages along a stretch of Edsa from Guadalupe to Magallanes were … [Read more...]
Microwave Oven Powers Small Devices with Electromagnetic Energy
Scientists in Japan have discovered a way to run kitchen appliances using electromagnetic energy scavenged from microwave ovens. While the majority of radiation generated by the common kitchen appliance is directed at the food inside the device, a portion of the energy can still escape through the gap around the door and through the metal-meshed window. So, for consumer … [Read more...]
Which Came First? The Chicken or the Egg?
I came across an interesting article in ITEM this past week about a Canadian helicopter that apparently has EMI problems. Like most such articles that I come across, I dutifully posted it in a variety of EMC related groups on LinkedIn. I do that for a couple of reasons. First, I believe its always a good idea to circulate relevant information to the EMC community. How can we … [Read more...]
Agilent Technologies to Separate into Two Public Companies
Agilent Technologies today announced plans to separate into two publicly traded companies: one in life sciences, diagnostics and applied markets (LDA) that will retain the Agilent name, and the other that will be comprised of Agilent's current portfolio of electronic measurement (EM) products. The separation is expected to occur through a tax-free pro rata spinoff of the EM … [Read more...]
Canadian Air Force Helicopters Beset With EMI Woes
Electromagnetic interference concerns are hampering progress on a Canadian Air Force project. According to The Canadian Press, the Canadian government has refused to accept four CH-148 Cyclone test helicopters currently parked at the Canadian Forces facility in Shearwater, N.S., on the basis that they are "non-compliant." Designed by Sikorsky Aircraft Corporation, the … [Read more...]
Wireless Technology Detects Falls by the Elderly
Engineers have developed a new wireless monitoring system that can detect if a person falls and alert emergency services through an auxiliary service without the need for a call button. The fall-detection system created by Brad Mager and Neal Patwari of the University of Utah employs an array of radio-frequency sensors installed around the perimeter of a room at heights … [Read more...]
Patent Awarded for Modular Shielded Electronics Enclosure with EMI Seals
The U.S. Patent and Trademark Office has awarded patent No. 8508956, “Modular Shielded Electronics Enclosure,” to CareFusion 303, Inc. of San Diego, Calif. According to the background information supplied by the inventors, the new patent covers “a modular electronics enclosure that incorporates EMI shielding for the enclosed electronics [while] reducing the electromagnetic … [Read more...]
Patent Issued for Signal Measurement Apparatus and Beam Modulation Apparatus Used Therein
The U.S Patent and Trademark Office has awarded patent No. 8527226, “Signal Measurement Apparatus and Beam Modulation Apparatus Used Therin” to Vanderbilt University in Nashville, Tenn. According to the background information supplied by the inventors, the new patent “relates to signal measurement, and more specifically to an apparatus for signal measurement and beam … [Read more...]
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