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Interference Technology

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Antennas

How the IEC is Organized for EMC

 

International EMC standards can be confusing to the newcomer. The IEC has posted a chart as to how the various standards organizations are organized. The first level of organization is the committees, such as TC77, CISPR, and various product committees. These committees have liaisons with associated standards organizations, such as ISO, ITU, CENELEC, and many others. Many of … [Read more...]

New 1GHz Optically Isolated Differential Measurement System

 

Tektronix recently announced the highest bandwidth optically-isolated differential probing system at APEC 2016. The system offers complete galvanic isolation between the measured system and oscilloscope. The system will accurately measure high bandwidth differential signals in the presence of large common-mode voltages. It will also offer immunity to external interference and … [Read more...]

Why Is There AIR (in MIL-STD-461G)?

 

Ken Javor, EMC Compliance January 2016 (with a tip of the hat to a great performer…) As noted in the compleat MIL-STD-461G review also found in this issue of ITEM, SAE Aerospace Information Report (AIR), AIR 6236, In-House Verification of EMI Test Equipment was written specifically to support MIL-STD-461G.  Specifically, section 4.3.11 Calibration of measuring equipment … [Read more...]

Blue Guide for EU Product Rules Available

 

The European Union’s (EU) “Blue Guide” describes general rules for placing electronic products on the market within the EU. It describes how the EU regulates the free movement of goods, when the harmonization rules apply, the product supply chain and their obligations, product requirements, conformity assessment, and accreditation. The document goes on to describe how market … [Read more...]

Simulation Software Upgrade Released

 

Savant and EMIT work in conjunction with ANSYS® HFSS™ software, enabling users to optimize a complete workflow to simulate the entire electromagnetic environment, including antenna synthesis and design, installed antenna performance and RF system analysis. The new releases of Savant and EMIT feature significant advances in solver technology, design flow automation and … [Read more...]

How Hedy Lamarr Invented Early Frequency-Hopping Technology

 

(By Kenneth Wyatt) A recent article by Intel describes how actress, Hedy Lamarr helped invent the first frequency-hopping anti-jamming system for torpedoes. The article describes, "A lonely immigrant from Austria slips out of her stage clothes and kicks off her heels. Carefully removing her movie makeup, she’s dissatisfied that she’s been overlooked for more significant … [Read more...]

Special Webinar on Spectrum Analyzers Available

 

Spectrum Analyzer Fundamentals - Part I, presented by Bill Kardine, Application Engineer, of Rohde & Schwarz, is a recorded webinar that covers the architecture of a spectrum analyzer and provides a detailed description of each function, how it works, and what impact they have on the measurement results. Typical spectrum analyzer measurements such as channel power, … [Read more...]

North Korea Interferes with GPS Navigation Systems

 

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...]

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...]

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