Newsweek reported South Korean officials have accused North Korea of using radio waves to interfere with GPS navigation systems near the border between the two countries. This apparently occurred just after North Korea fired a short-range missile into the East Sea. South Korea’s Yonhap News Agency referred to this as an act of “defiance against mounting pressure to give up its … [Read more...]
Fast Radio Burst "Afterglow" Is Actually Flickering Black Hole
Harvard University reported that last February a team of astronomers reported detecting an “afterglow" from a mysterious event called a fast radio burst "which would pinpoint the precise position of the burst's origin." "New research by Harvard astronomers Peter Williams and Edo Berger shows that the radio emission believed to be an afterglow actually originated from a distant … [Read more...]
CISPR Provides Standards for SmartGrid
CISPR’s (International Special Committee on Radio Interference) primary role is standardization in the field of control of emissions above 9 kHz from devices, and as such has published various standards that cover or can be applied to SmartGrid system emission measurements and control. To ensure protection of the radio frequency spectrum, emissions must be addressed … [Read more...]
EMI Suppression Filters Available
Chilisin Electronics Corp. offers a wide range of surface mount power and signal ferrites and common mode chokes. Korean company Chilisin was established in 1972 and specializes in inductor and filter manufacturing. Their web site has several useful application notes on a wide range of fields, as well as several tools for simulating ferrite performance. To view their … [Read more...]
Handheld 3.6/6 GHz Spectrum Analyzers
AIM-TTi is offering a spectrum analysis up to 6 GHz that fits in your hand. The model PSA3605 covers 10 MHz to 3.6 GHz and the model PSA6005 covers 10 MHz to 6 GHz, and both offer resolution bandwidths from 300 Hz to 10 MHz in a 1:3:10 selection, according to the company. The units have a zero span mode and a built-in demodulation for AM and FM. Trace modes … [Read more...]
National Radio Quiet Zone – Quietest Place in the USA
(April 4, 2016, Kenneth Wyatt) With all the mobile communications we enjoy, along with the associated radio, television and cell phone transmitting towers, would you believe there is a place in the U.S. where all that is either prohibited or very closely controlled? That place is the The National Radio Astronomy Observatory (NRAO) in Green Bank, West Virginia. What originally … [Read more...]
Cell Phone Co. Works with Satellite Industry to Reduce Potential Interference
According to FierceWireless.com, "Verizon representatives who met with FCC officials on March 1 said they will be working with satellite providers to try to find common ground on potential interference issues between future mobile terrestrial operations and existing satellite earth stations in the 28 GHz band." FierceWireless.com reported that "Verizon says it supports rules … [Read more...]
NASA Demonstrates Communication Via Laser
NASA engineers intend to demonstrate a new laser-based communication system in 2016 that will allow the streaming of high-definition video from distances beyond the Moon. "This dramatically enhanced transmission speed will be demonstrated by the Laser Communications Relay Demonstration (LCRD), one of three projects selected by NASA's Office of the Chief Technologist (OCT) for … [Read more...]
Multi-Clock Comb Generator Finds PDN Sensitivities and EMI
Picotest has recently announced their USB multi-clock comb generator, the J2150A, designed to ferret out resonant sensitivities in your power delivery network (PDN). The J2150A is a troubleshooting tool to help reveal resonances in power bus and power supply circuitry. It’s also very useful as an EMC/EMI troubleshooting tool and can also help identify EMI resonances that may … [Read more...]
New EMI Shielded Vents and Filters
Tech-Etch has EMI Shielded Honeycomb Vents, Fan Vents, Quiet Vents, and Air Filters from prototype to high volume in all shapes and sizes available now. Their in-house plating improves shielding effectiveness and environmental protection, while providing fast turnaround. Many RoHS compliant finishes are available. Honeycomb Vents are offered in both standard and custom … [Read more...]
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