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Apple, Google, Phone Firms Join FCC to Kill off Robocall 'Scourge'

NIST's New Password Rules

Forward Auction of 600 MHz AWS-3 Airwaves Draws over $9B in Bids

'Human Sacrifice' Ceremony at Geneva's CERN Laboratory

Rural China Kick Starts Global Smartphone Growth

'Auction' of NSA Tools Sends Security Companies Scrambling

Quantum Mechanics Trumps Nonlocal Causality

Can Cellphones Make You Feel Less Connected to Friends and Family?

U.S. Army Awards BlackBerry Certificate of Networthiness and Authorization

Airlines Challenge Lithium Ion Battery Shipments

Verizon's 'One Talk' Marries Office and Mobile Phones for Small Businesses

Vintage Electronics Magazines for Sale

Vintage Electronics Magazines for Sale - RF CafeOwn a piece of history and support RF Cafe at the same time! My collection of vintage electronics magazines has grown very large. They are where I get the articles that I scan and post here on RF Cafe. I buy them on eBay for around $3-$4 apiece. There are others I would like get, but will not until some of my existing inventory is sold. It is really cool to peruse the pages of these old magazines and see what was considered ...

New! Raychem Matched Impedance Splices (TE Connectivity)

Raychem Matched Impedance Splices (TE Connectivity) - RF Cafe Cool ProductAs one of a dwindling number of people who still read paper print versions of our electronics trade magazines, I find it more convenient to scan for noteworthy new products and articles to report about on RF Cafe. I tear out pages and put them a stack for eventual reference. The April 2016 issue of Microwaves & RF had a feature on a new line of Raychem (TE Connectivity) heat-shrink matched-impedance splices. I have used Raychem's heat-shrink splices ...

Carl & Jerry: Geniuses at Work

Carl & Jerry: Geniuses at Work, June 1956 Popular Electronics - RF CafeIn typical Carl & Jerry style, the teen experimenters ('makers' or 'DIYers' in contemporary lingo) spent another summer vacation day cobbling together an electromechanical contraption or even purely electronic device with a specific goal in mind. Whether designing and building a circuit for tracking down the cause of strangely acting synchronized wall clocks ("The Crazy Clock Caper") or devising a system for catching a vandal in the act of vandalizing ("Geniuses at Work" - this story), creator John T. Fry provides a mix of developing personalities, describing the task at hand, and maintaining a degree ...

Anatech Electronics' August Newsletter Now Available

Anatech Electronics Newsletter for August 2016 - RF CafeAnatech Electronics, a manufacturer of RF and microwave filters, has published its August 2016 newsletter. As always, it includes both company news and some tidbits about relevant industry happenings. This month, Sam Benzacar discusses the topics of "IoT Connectivity: The Next Interference Challenge," Facebook's OpenCellular, Passive WiFi, and "AT&T Dreams BIG." Anatech's business is to make certain that system and circuit designers have capable filters available to assure successful implementation ...

Qualcomm Finds Wi-Fi Doesn't Share Spectrum So Well

Qualcomm Finds Wi-Fi Doesn't Share Spectrum So Well - RF Cafe"As the debate continues over whether Wi-Fi and LTE-U can be good neighbors in unlicensed spectrum bands, Qualcomm has found that Wi-Fi access points don't always share spectrum well either. According to EE Times, Qualcomm, while researching test parameters for Wi-Fi and LTE-U coexistence, found that Wi-Fi access points can stray far from the ideal 50/50 spectrum sharing scenario. Mingxi Fan, vice president of engineering at Qualcomm, said three brands of high-quality access points vary from 10% to 90% in sharing ...

New NI AWR Software Videos on AWR.TV YouTube Channel

New Videos Featuring NI AWR Software Now Available on AWR.TV YouTube Channel - RF CafeAn International Microwave Symposium 2016 (IMS2016) MicroApps presentations playlist has been added to the AWR.TV YouTube channel. These videos showcase the latest features in NI AWR Design Environment for load pull, radar systems and antenna design. The videos contained within the playlist include: Advances in System-Level Modeling of Large Phased-Array Simulations, Phased-Array Antenna Simulation for 5G, Advances in Integration of EM Simulation Within a High-Frequency Circuit Design ...

USAF to Improve Military Code GPS Receivers

Air Force to improve Military Code GPS receivers - RF Cafe"The Air Force is continuing to upgrade its Global Positioning System performance with a $52.6M contract awarded to Raytheon for modernization of the Miniature Airborne GPS receiver 2000, known at MAGR-2K. The work will involve the testing and delivery of a Military Code (M-Code)/automatic dependent surveillance and broadcast-capable system. Under the terms of the deal, Raytheon will also account for future upgrades, designing out anticipated obsolescence issues while providing for open systems architecture approaches, according ..."

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3 Companies Agree to Plead Guilty for Fixing Prices of Electrolytic Capacitors

 Companies Agree to Plead Guilty for Fixing Prices of Electrolytic CapacitorsHere's a weird headline: "The U.S. Department of Justice announced this week that three companies have agreed to plead guilty for their roles in a conspiracy to fix prices for electrolytic capacitors sold to customers in the U.S. and elsewhere. The companies are Rubycon Corporation, Elna Co Ltd, and Holy Stone Holdings Co Ltd. 'The Antitrust Division has now charged five companies and one individual for their participation in this international price-fixing conspiracy,' Deputy Assistant Attorney General Brent Snyder . 'The electrolytic capacitors conspiracy affected millions of American consumers ..."

Radio Training Association of America Advertisement

Radio Training Association of America Advertisement - RF CafeWhenever I see advertisements for electronics training courses, I think of the line in "Duel in the Snow, or, Red Ryder Nails the Cleveland Street Kid," where it mentions how during the Great Depression years the magazines were filled with ads "promising successful careers repairing radios." That story, which ultimately became the book and movie A Christmas Story, was contained in Gene Shepherd's book In God We Trust: All Others Pay Cash. Jean Shepherd was a radio ...

Webinar: How to Design Phased Arrays for 5G, Radar, and Satellite

Webinar: How to Design Phased Arrays for 5G, Radar, and Satellite - RF Cafe
Multi-channel phased arrays using beamforming and MIMO are key enablers in the next generation of 5G, Radar, and Satellite communications systems. However, phased array design and verification is complex and crosses multiple engineering disciplines & tools domains. Viewers will learn tools and techniques to connect baseband, RF, and antenna domains into a predictive, model-based engineering flow from spreadsheets to test. This webcast starts at the system-level perspective and considers both transmitters and receivers ...

Saelig Intros TEA6000-95 0.1 to 6 GHz Digital Attenuator

Saelig Introduces TEA6000-95 0.1 to 6 GHz Digital Attenuator - RF CafeSaelig Company announces the availability of the TEA6000-95 0.1 to 6 GHz Digital Attenuator. This new RF signal attenuator operates over a 0.1 to 6 GHz frequency range and can reduce input signal amplitudes by up to 95 dB in 0.5 dB steps. It features excellent solid-state repeatability and performance, and the output signal is uninterrupted when changing attenuation values. It is powered and controlled using a USB interface. With a power rating of +23 dBm and a maximum switching speed of 1 μsecond ...

'Interscatter' Tech Lets Implants Talk Wi-Fi

'Interscatter' Tech Lets Implants Talk Wi-Fi - RF Cafe"University of Washington researchers have developed what they call 'interscatter communication' technology that backscatters (or reflects) existing signals like Bluetooth in the air, transforming wireless transmissions from one technology to another. Specifically, the team of UW electrical engineers and computer scientists has demonstrated for the first time that Bluetooth transmissions can be used to create Wi-Fi and ZigBee-compatible signals. As a result ..."

Blue–Violet InGaN Laser Diode Operates at Room Temperature

Blue–Violet InGaN Laser Diode Operates at Room Temperature - RF Cafe"In a paper recently published in Nature Photonics Letters titled 'Room-temperature continuous-wave electrically injected InGaN-based laser directly grown on Si,' they describe how a carefully engineered Al-composition step-graded AlN/AlGaN multilayer buffer between the Si and GaN successfully eliminated crack formation while also reducing the dislocation density. Often, one way to circumvent the large lattice mismatch between GaN and Si (around 17%) is to ..."

Tech Giants Gobble Start-Ups in Antitrust Blind Spot

Tech Giants Gobble Start-Ups in Antitrust Blind Spot - RF Cafe"Walmart's $3.3B acquisition of Jet.com can be expected to sail through antitrust review, eliciting barely a peep of objection from the federal government. Like Facebook's acquisition of WhatsApp, the Walmart deal will probably end up being another example of an upstart internet company being swallowed up to preserve the stranglehold of a giant. This happens because antitrust regulators are stuck in an outdated view of the world, while the internet giants are more attuned to their nascent competitive threats. The deal for ..."

Video: Mercury and Gallium Totally Destroys Aluminum Heatsink

Mercury and Gallium Totally Destroys Aluminum Heatsink - RF Cafe"In a process called amalgamation, ductile metals become brittle after being exposed to certain chemical environments. Most notable is the dramatic effect through the physical reaction ensuing after solid metal is exposed to liquid metals. Aluminum with mercury or gallium provides a specifically fascinating combination in which sees aluminum get completely destroyed by even a small amount of Al or Hg. Although pure aluminum is highly reactive ..."

USAF Reveals Plan to 'Bomb the Sky' to Improve Radio Reception

USAF Reveals Plan to 'Bomb the Sky' to Improve Radio Reception"A fleet of tiny satellites could one day be used to detonate plasma bombs in Earth's upper atmosphere to improve the range of radio communications. The U.S. Air Force has granted contracts to three research teams to develop the technology needed to do this, with hopes that CubeSats could carry massive amounts of ionized gas to the ionosphere to create radio-reflecting plasma. The ionosphere begins roughly 40 miles above the surface and becomes denser with charged particles at night, allowing signals to travel ..."

A Hyperbolic Compact Generalized Smith Chart

A Hyperbolic Compact Generalized Smith Chart - RF CafeNo, this is not yet another depiction of the event horizon of a black hole. It is, however, a new way of visualizing information on the Smith Chart, as conceived by the originator of the 3D Smith Chart, Andrei A. Muller, with co-author Esther Sanabria-Codesal. The similarity to relativity is not so unexpected. Both involve the 2D projection of a 3D surface, both involve a scientist / engineer enlisting the assistance of a mathematician, and both involve the work of Poincaré. "The hyperbolic Smith chart maps the circuits with positive reactance above the horizontal (real line) of the ρh plane and the circuits with negative reactance below the real line of the hyperbolic reflection coefficients plane." Got that? ...

What Is Li-Fi and How Can It Improve 5G Communications?

What Is Li-Fi and How Can It Improve 5G Communications? - RF Cafe"Nowadays there are many ways in which cell phones can connect to Internet by switching between the 3G, 4G and Wi-Fi services. However, these systems can be easily saturated in places where there is a high user density. Li-Fi is a complementary system that has been studied for more than 100 years and data would be transmitted in frequencies between the 400 and 800 THz, the visible light spectrum. The aim of Li-Fi is to send information through conventional lighting elements (LEDs) at the same ..."

Painless Reconversion - Establishing Hobby Relations on a Firm Footing

Painless Reconversion, September 1947 QST - RF CafeWhen the FCC forbade amateur radio operators from transmitting during the years encompassing World War II (with a few exceptions), many Hams who were very active in the hobby went a bit stir crazy and began looking for other pastimes. They could still listen to other broadcasts, but no CW or phone transmissions were allowed. Author Chester Cunningham recounts here his chosen replacement avocation - aviation. His humorous story demonstrates one way Hams, whose curtailed radio activities resulted in equipment that had atrophied ...

Nuclear Puzzle May Be Clue to 5th Force of Nature

Nuclear Puzzle May Be Clue to 5th Force - RF Cafe"In a new paper, University of California, Riverside theoretical physicist Flip Tanedo and his collaborators have made new progress towards unraveling a mystery in the beryllium nucleus that may be evidence for a fifth force of nature. Earlier this year, an experiment in Hungary reported very unusual behavior in the decays of beryllium-8 nuclei. The experimental collaboration suggested that their results may come from the effects of a new ..."

Genetically Modified Bacteria Conduct Electricity

Genetically Modified Bacteria Conduct Electricity - RF Cafe"Researchers at the University of Massachusetts at Amherst have genetically modified common soil bacteria to produce nanowires capable of conducting electricity at a level that surprised even the scientists themselves. After years of skepticism that this was even theoretically possible, the practical demonstration could lead to a new generation of 'green' electronics in which nanowires could be produced in plant waste, without the need for toxic chemicals. The research ..."

Wireless Engineering Crossword Puzzle for August 21, 2016

For the sake of avid cruciverbalists amongst us, each week I create a new crossword puzzle that has a theme related to engineering, mathematics, chemistry, physics, and other technical words. You will never be asked the name of a movie star unless he/she was involved in a technical endeavor (e.g., Hedy Lamar). Enjoy! ...

National Company Infomercial

National Company Infomercial, May 1951 QST - RF CafeNational Company, headquartered in Malden, MA, was a manufacturer of radio receivers for military and amateur use in the mid part of last century. They ran many full-page advertisements that were actually infomercials in that much more of the content presented generally useful technical information than pitched a product. This particular installment, which appeared in a 1951 issue of QST magazine, describes how extensive experimentation and testing on their HRO-50 receiver by a Ham radio guy led to a circuit change in future production models. It involved ...

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