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Homepage Archive - July 2018 (page 1)

These archive pages are provided in order to make it easier for you to find items that you remember seeing on the RF Cafe homepage. Of course probably the easiest way to find anything on the website is to use the "Search RF Cafe" box at the top of every page.

Homepage Archive Pages

2018:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2017:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2016:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2015:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2014:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2013:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec

See Page 1 | 2 | 3 of the July 2018 homepage archives.


Tuesday 10

Mini Radar and AI Instead of Finger-Pricking for Diabetics

Mini Radar and AI Instead of Finger-Pricking for Diabetics - RF Cafe"Instead of finger pricking, a miniature radar might one day tell diabetics what their blood-sugar level is, according to the University of Waterloo in Canada. 'We want to sense blood inside the body without actually having to sample any fluid,' said engineer Professor George Shaker. 'Our hope is this can be realized as a smart watch to monitor glucose continuously.' The proof-of-concept involved re-purposing a miniature 60 GHz gesture-recognition radar created by Google and Infineon - Project Soli - both firms are participating in the Waterloo research - to investigate the dielectric properties of samples ..."

Insider $$$tock Trading at Your Company

Insider Stock Trading at Your Company (Kirt's Cogitation #305) - RF CafeIn 2010, I posted a short piece about where to look on the Web to learn what upper management, board members, and large investors were doing with insider company stock trades. At the time, the MSN Money website had a tool where you could enter a company's stock symbol and get a readout of who was buying and - more often than not - selling stock. That web page is gone, but I found the same information on InsiderCow.com. The dollar amounts are truly staggering to people like you (likely) and me (definitely). Numbers reported are sale values, not profit to the stock holder. Many of the stocks were issued as either grants or options, but even outright purchased stocks are included as well. Regardless, prepare to have your jaw drop if you have never seen this type of data before. Some of the more familiar technology companies have been selected for examples ...

The Vanishing Nuclear Industry

The Vanishing Nuclear Industry - RF Cafe"Could nuclear power make a significant contribution to decarbonizing the U.S. energy system over the next three or four decades? That is the question asked by four current and former researchers from Carnegie Mellon University's Department of Engineering and Public Policy. Their answer: probably not. In a paper, 'U.S. nuclear power: The vanishing low-carbon wedge,' just published in PNAS, the team examined the current U.S. nuclear fleet, which is made up of large light water nuclear reactors. While for three decades, approximately 20% of U.S. power generation ..."

DIY Patch-Cord Holder

Patch-Cord Holder, October 1959 Electronics World - RF CafeWith as inexpensive and readily available as prefabricated test lead holders are nowadays, there is not a lot of motivation to make your own. Such was not necessarily the case in 1959 when this DIY article appeared in Electronics World magazine. Still, if you have some spare sheet metal laying around and a bandsaw to cut it, you can save a couple bucks (or euros, yen, rubles, etc.) by making one or more yourself. All of my test leads are draped over nails driven into my wooden test bench, which can create a nasty snarl. Maybe I'll whip up one of these for myself ...

The 5 Most Critical Project Metrics

The Five Most Critical Project Metrics - RF CafeThe phenomenon of chasing growth at the expense of profit margin can happen in any business, but this is nowhere more true than in a professional or creative services business. Yes, you've been busy. Yes, you've served clients. But you could be less busy and serve more clients - and be more profitable. "The 5 Most Critical Project Metrics" will discuss the five most critical metrics that every services business needs to have readily available, and how to calculate them, so you can turn your data into decisions ...

Quantum-Enhanced Sensing of Magnetic Fields

Quantum-Enhanced Sensing of Magnetic Fields - RF Cafe"An international team of physicists has demonstrated that algorithms and hardware developed originally in the context of quantum computation can be harnessed for quantum-enhanced sensing of magnetic fields. The field of quantum science and technology experiences an ever-intensifying flurry of activity. The headlines are currently dominated by reports on progress towards building quantum computers that outperform their classical counterparts at specific computational tasks. A key challenge in that quest is to increase the quality and number of basic building blocks - known as quantum bits, or qubits ..."

Monday 9

How Intermodulation Distortion (IMD) Results from Nonlinearity

Intermodulation Distortion, February 1960 Electronics World - RF CafeAudio distortion is most often expressed as total harmonic distortion (THD) as opposed to intermodulation distortion (IMD). As the name suggests, THD is a measure of harmonic power content relative to the fundamental frequency (a single tone) from which harmonics are created. IMD on the other hand, is generated from the nonlinear mixing of two or more tones, with the products being non-harmonically related to the original tones. The author's discussion of audio frequency IMD applies equally to radio frequency IMD. Intentionally generated harmonic components can enhance sound quality due to being consonant, whereas IM products create dissonant tones not directly related to the originals ...

Making Sound-Opaque Materials Totally Transparent

Making Sound-Opaque Materials Totally Transparent - RF CafeHere is something straight out of "Tom Swift and the Electronic Hydrolung"." "Researchers have found a way to make materials that are normally opaque to sound waves completely transparent. Their system involves placing acoustic relays at strategic locations so that sound waves can propagate at a constant amplitude - regardless of what may lie in their path. This method could eventually be used to make it possible to hide objects like submarines. Most naturally occurring materials have a disordered atomic structure that interferes with the propagation of both sound and electromagnetic waves. When the waves come into contact with these materials ..."

Solder Gun Thermal Wire Stripper

Solder Gun Thermal Wire Stripper, May 1959 Electronics World - RF CafeHidden away on page 134 of a 1959 issue of Electronics World, at the end of a Mac's Service Shop-like electronics shop docudrama (Another Day in the Shop) is this handy tip on how to fabricate a make-shift thermal wire stripper from a soldering gun or a soldering iron. The beauty of thermal strippers over mechanical strippers is that they do not nick the underlying metal wire. Heated elements melt the insulation and then a blunt edge is used to slide the insulation off the end of the wire. Another advantage is that you can strip a wide range of wire gauges and insulation types without needing to adjust the jaws or change to a different hole location - although a proper temperature setting is required to avoid a gloppy, stringy mess ...

July 1969: "The Engineer's" Coverage of the Apollo 11 Mission

July 1969: "The Engineer's" Coverage of the Apollo 11 Mission - RF CafeHere is a subject near and dear to my heart: Apollo 11. The Engineer provided coverage, and they now make available their archive. This is a year shy of the half-century anniversary (July 20, 1969). "Just days before Neil Armstrong became the first person to set foot on the moon. The Engineer took a detailed look at the technology that would get him and his fellow astronauts safely there and back again. How do you mark the most significant achievement in the history of mankind? The Apollo landings of the late 60s and early 70s are still seen as the high water mark of humanity, and as The Engineer pointed out, much of the millions of words of press coverage of the first mission to land, Apollo 11 ..."

JWST Launch Delayed to 2021 at Extra Cost of ~$1B

JWST Launch Delayed to 2021 at Extra Cost of ~$1B - RF CafeI'm looking forward to JWST data, and sure hope it doesn't suffer a HST-type failure. "An independent panel has informed NASA that the James Webb Space Telescope will not be ready for launch until March 2021, and Congress will have to reauthorize the long-delayed, over-budget mission after breaching an $8B cost cap, officials said Wednesday. Blunders made by Webb's manufacturing and test team at Northrop Grumman, the mission's prime contractor, are largely responsible for the launch delay, according to Thomas Young, a former Lockheed Martin executive and NASA program manager who chaired the review board examining the mission's development ..."

Sunday 8

Engineering Crossword Puzzle w/Weekly Headlines for July 8

RF Cafe Engineering Crossword Puzzle w/Weekly Headlines July 8, 2018At least 10 clues with an asterisk (*) in this technology-themed crossword puzzle are pulled from this past week's (7/2 - 7/6) "Tech Industry Headlines" column on the RF Cafe homepage. For the sake of all the avid cruciverbalists amongst us, each week I create a new technology-themed crossword puzzle using only words from my custom-created related to engineering, science, mathematics, chemistry, physics, astronomy, etc. You will never find among the words names of politicians, mountain ranges, exotic foods or plants, movie stars, or anything of the sort. You might, however, see someone or something in the exclusion list who or that is directly related to this puzzle's theme ...

Friday 6

Generate a High-Frequency Magnetic Field Using This Resonant Technique

Generate a High-Frequency Magnetic Field Using This Resonant Technique - RF CafeThis article by KC Yang piqued my interest mainly because of the Helmholtz coil, whose main feature is a uniform magnetic field between the coils. Although this piece discusses generating strong, high frequency AC fields into which test samples are inserted, my first experience with Helmholtz coils was at the Westinghouse Oceanic Division in Annapolis, MD, in the 1980s. Engineers there had a test setup in a special shack located far from the main building. Non-ferromagnetic materials were used in the construction where possible - aluminum nails, wiring, hardware, etc., so at to have a minimal effect on devices under test (DUTs). Yang's application uses resonance techniques to generate high strength, high frequency magnetic fields using voltages significantly lower than might otherwise be required ...

Flexible, Fingertip-Wearable Terahertz Imagers

Carbon Nanotubes for Flexible, Fingertip-Wearable Terahertz Imagers - RF Cafe"Researchers at Tokyo Institute of Technology have developed flexible terahertz imagers based on chemically 'tunable' carbon nanotube materials. The findings expand the scope of terahertz applications to include wrap-around, wearable technologies as well as large-area photonic devices. Carbon nanotubes (CNTs) are beginning to take the electronics world by storm, and now their use in terahertz (THz) technologies has taken a big step forward. Due to their excellent conductivity and unique physical properties, CNTs are an attractive option for next-generation electronic devices. One of the most promising developments ..."

Troubleshooter's Guide to CRT Defects

Troubleshooter's Guide to CRT Defects, July 1959 Electronics World - RF CafeAs an influential member of the Internet media  ;-) , I feel an obligation of sorts to make information I have access to available to fellow vintage electronics aficionados, even if it pertains to a narrow field of interested parties. Not many folks are frantically seeking assistance with troubleshooting cathode ray tube (CRT) problems, but those who are in need greatly appreciate locating content someone else took the trouble to make available. The surest way to have Google, Bing, and other search engines discover and register it is to place a link on the RF Cafe homepage. The main search engines usually grab my content within a couple hours of it being posted; that is one of the perks associated with having been around for 20 years. Many companies I have posted items about ...

Free Whitepaper: Global Supply Chain Risk Report

Global Supply Chain Risk Report - RF Cafe"The report investigates actual supply chain risks faced by European companies with international footprints. Experts from Cranfield's Centre for Logistics and Supply Chain Management have analysed data supplied by Dun & Bradstreet, drawing conclusions from around 600,000 anonymous transactions between European buyers and their suppliers located in more than 150 countries worldwide. The report looks at four key metrics (Supplier Criticality, Supplier Financial Risk, Global Sourcing Risk and Foreign Exchange risk) to assess supply chain risk and provide businesses with a view of trends within their industry sector, and across the wider economy ..."

The Venerable Simpson 260 Multimeter

Simpson 260 Multimeter - RF CafeThe Simpson 260 multimeter has been around a long time - about eight decades. It is on version 8 now. My first encounter with a Simpson 260 was in my high school electrical vocational classes. We had them in the USAF radar shop as well, then in every company lab in which I worked. Sadly, I do not personally own one. John Ellis has a nice historical account of the Simpson 260 multimeter in the July 2018 issue of QST magazine. Unfortunately the ARRL does not make the article available online to non-members, but surely there is a Ham nearby who can lend you his/her copy for reading ...

China Aims to Beat NASA with Super-Powerful Rocket

China Aims to Beat NASA with Super-Powerful Rocket - RF Cafe"China is working on a super-powerful rocket that would be capable of delivering heavier payloads into low orbit than NASA, a leading Chinese space expert was quoted as saying Monday. By 2030, the Long March-9 rocket under development will be able to carry 140 tonnes into low-Earth orbit - where TV and earth observation satellites currently fly - said Long Lehao, a senior official from the Chinese Academy of Engineering, according to the official Xinhua news agency. This compares to the 20 tonnes deliverable by Europe's Ariane 5 rocket or the 64 tonnes by Elon Musk's Falcon Heavy ..."

Thursday 5

Mac's Service Shop: Two for One

Mac's Service Shop: Two for One, March 1960 Electronics World - RF CafeIt is a rare occasion that Barney bests Mac when it comes to electronics prowess. Good natured back and forth often goes on between them during troubleshooting sessions and impromptu discussions about business practices, industry trends, and customer interactions; indeed, John Frye depends on it to make the stories interesting. This time, underling Barney exploits knowledge gained from a recently purchased electronics reference book to trip up shop owner Mac over which of two metals has the lowest resistance. Mac's choice is one many people would instinctively make - and be wrong as Mac was. Here is a table of electrical resistivity values for various metals and substances ...

Free Engineering & Technology Magazine Subscriptions

Engineering White Papers & Books, July 2018 - RF CafeWhitepapers, pamphlets, books, magazines, and chapter examples listed here are a small sample of a lot of new items that are offered for FREE through TradePub. The publishers make them available to qualifying people as a promotional campaign for their full line of offerings. Whitepaper topics include careers, manufacturing, and engineering, while magazine titles include Microwave Engineering Europe, Electronic Design, and Microwave Product Digest. Note: I earn a few pennies when you subscribe to these so please help yourself and me ;-) ...

Ford Mustang Price with Tariffs

Ford Mustang Price with Import Tariffs - RF CafeA radio announcer mentioned today that the base price of a Ford Mustang in the U.S. is $25k while in China it is $64k. Chevy Camaro Price with Import Tariffs - RF CafeA Chevy Camaro costs about $27k in the U.S. and $58k in China. Those are the pre-Trump prices that include import tariffs and special auto taxes. EU countries charge a 10% import tariff on U.S. cars while the U.S. charges 2½% on EU imports. Other fees and taxes often make increase the difference even more. It is a bit confusing, but here is the official Harmonized Tariff Schedule, published by the U.S. International Trade Commission so you don't need to rely on the interpretations of others.

Electron Tube Crossword Puzzle

Electron Tube Crossword Puzzle, May 1959 Electronics World - RF CafeWith even a modicum of familiarity with vacuum tube terminology, you will fairly easily complete the custom crossword puzzle. This Electron Tube Crossword Puzzle appeared in the May 1959 issue Electronics World, which was the first sporting the name change from Radio & TV News. If you are a hard-core crossword puzzle worker, then check out my weekly RF Cafe crossword puzzles that draws upon a custom dictionary of thousands of engineering, science, chemistry, and other technical words, along with words from current news items. Bon chance ...

Whitepaper: Recruiting Millennials

Recruiting Millennials - RF CafeThis could be useful insight into the thinking of the new cadre of college grads. "Leadership estimates that within three years, 60% of their worldwide employees will be Millennials. In an effort to attract these recent college graduates, Unilever partnered with HireVue to transform recruitment efforts using digitally recorded interviews and science-based assessment tests and data analysis. This Bersin by Deloitte case study: Explains the challenges in recruiting Millennials. Reveals how the company digitally transformed the way it hires recent graduates. Demonstrates how to adopt cutting-edge technology while dramatically reducing costs and time to hire ..."

Facebook's Project Aquila Arial Base Station Crashes

Facebook's Project Aquila Arial Base Station Crashes - RF Cafe"Facebook has cancelled its UK-based high altitude unmanned aircraft project, Aquila. The project, based in Somerset, aimed to provide Internet basestations that could stay in the air for weeks at a time at an altitude of 60,000 ft. However the 2 kW power requirements and the laser communications technology that was intended to link aircraft in the sky and to the ground were both significant challenges. 'The only spectrum available for these platforms wasn't suitable for broadband due to technical and geographical limitations,' said Yael Maguire, director of engineering at Facebook ..."

Wednesday 4

Novel Semiconductor Devices

Novel Semiconductor Devices, October 1959 Electronics World - RF CafeGermanium was "the" semiconductor of choice in 1959 even though advances were being made with silicon. Most of the newer semiconductor devices were being fabricated with germanium as the central transducer element. Temperature sensors, strain gauges, "sensistor" variable resistance units, Hall effect sensors and gyrators and circulators, torsional (twist) transducers, displacement sensors, and even neutron detectors were done in germanium. Even though silicon is referenced as being applicable to all the devices, it was not until the 1960s that silicon began to dominate semiconductor fabrication. This paper titled ,"From Germanium to Silicon, A History of Change in the Technology of the Semiconductors ..."

Thanks Once Again to everythingRF for Long-Time Support!

everything RFPlease take a few moments to visit the everythingRF website to see how they can assist you with your everythingRF products - RF Cafeproject. everythingRF is a product discovery platform for RF and microwave products and services. They currently have 169,552 products from more than 1040 companies across 258 categories in our database and enable engineers to search for them using their customized parametric search tool ...

Whitepaper: 7 Hidden Costs and Fails of Legacy Mobile Testing Labs

7 Hidden Costs and Fails of Legacy Mobile Testing Labs - RF Cafe"Rapid evolution and penetration of mobile technology has totally changed the way Dev teams test apps. Yet, some of the biggest names in cloud-based testing have not evolved their models to keep up with this change. Their legacy technology and approach results in costly production glitches and app abandonment. Legacy labs including AWS Device Farm, Perfecto and SauceLabs continue to charge a fortune for capabilities which are out of date and unnecessary. In this paper we will reveal seven hidden costs and capabilities which legacy mobile testing labs charge for but do not deliver. Then we will introduce a new high-performance ..."

TUM Researchers Bring THz Electronics Nearer

TUM Researchers Bring THz Electronics Nearer - RF Cafe"Technical University of Munich physicists Alexander Holleitner and Reinhard Kienberger have succeeded in generating electric pulses in the frequency range up to 10 THz using tiny, so-called plasmonic antennas and run them over a chip. Researchers call antennas plasmonic if, because of their shape, they amplify the light intensity at the metal surfaces. The shape of the antennas is important. They are asymmetrical: One side of the nanometer-sized metal structures is more pointed than the other. When a lens-focused laser pulse excites the antennas, they emit more electrons on their pointed side than on the opposite flat ones. An electric current ..."

The Declaration of Independence

The unanimous Declaration of the thirteen united States of AmericaIn CONGRESS, July 4, 1776.

The unanimous Declaration of the thirteen united States of America.

When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God entitle them, a decent respect to the opinions of mankind requires that they should declare the causes which impel them to the separation. We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.--That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed, --That whenever any Form of Gov ...

Tuesday 3

Hi-Fi Crossover Networks

Hi-Fi Crossover Networks (part 2), May 1959 Electronics World - RF CafeSince I am currently planning a loudspeaker configuration to replace the original speaker in my 1941 Crosley 03CB floor model AM / shortwave radio set, this article made for a good refresh on audio frequency crossover networks. A very nice set of design charts is provided. Of course today there is no need to design and build your own since commercial units are very good and cost less than what I could build myself. Many moons ago while serving in the USAF at Robins AFB, Georgia, I did actually build my own crossover circuit for use in custom speaker cabinets I built in the base woodshop. The speaker that came in the Crosley has a 12" cone, which is still in good condition, but it uses an electromagnetic voice coil rather than a permanent magnet like modern speakers use ...

Where 3 Million Electric Vehicle Batteries Will Go When They Retire

Where 3 Million Electric Vehicle Batteries Will Go When They Retire - RF CafeThe report doesn't mention what portion of the "retired" batteries will be reusable, but this is better than scrapping them all. "The first batches of batteries from electric and hybrid vehicles are hitting retirement age, yet they aren't bound for landfills. Instead, they'll spend their golden years chilling beer at 7-Elevens in Japan, powering car-charging stations in California and storing energy for homes and grids in Europe. Lithium-ion car and bus batteries can collect and discharge electricity for another seven to 10 years after being taken off the roads and stripped from chassis - a shelf life with significant ramifications for global carmakers ..."

ColVisTec UV-Vis Spectrophotometry

ColVisTec UV-Vis spectrophotometry - RF CafeColVisTec, located in Berlin, Germany, has been added to the Manufacturing Equipment vendor list on RF Cafe. "By adding inline UV-Vis spectrophotometry devices onto the assembly line, we can measure the production output in real-time. In addition, it opens opportunities for productivity as well as quality gains, leading to a huge stand-alone benefit for your factory when implemented into the context of digitalized manufacturing. Our technology can be customized for a wide variety of processes, allowing flexible hardware configurations, offering data output in different formats, and excellent integration with the software solutions already in place ...

For the Record - Forty Years Young

For the Record - Forty Years Young, July 1959 Electronics World - RF CafeElectronics World magazine editor W.A. Stocklin commemorated the fortieth anniversary of the publication's existence with a long look back to 1919 when it debuted as Radio Amateur News. Two months previous to this July 1959 issue was the first instance of the name change from Radio & Television News, which was known as simply Radio News from June 1920 through July 1948. Finally, in 1972 Electronics merged with and became Popular Electronics. The inestimable Hugo Gernsback, a prolific writer and inventor, was the progenitor of this magazine series - and many other magazines, fiction, and non-fiction books. Stocklin had taken over as editor a couple decades earlier as Gernsback moved on to other projects ...

Free Presentation: The Spectrum of Mobile Risk

The Spectrum of Mobile Risk - RF Cafe"The world has changed. Yesterday everyone had a managed PC for work and all enterprise data was behind a firewall. Today, mobile devices are the control panel for our personal and professional lives. This change has contributed to the single largest technology-driven lifestyle change of the last 10 years. As productivity tools, mobile devices now access significantly more data than in years past. This has made mobile the new frontier for a wide spectrum of risk that includes cyber attacks, a range of malware families, non-compliant apps that leak data, and vulnerabilities in device operating systems or apps. A secure digital business ecosystem demands technologies ..."

FAA Improves GPS with Raytheon's GEO 5 Navigation Payload

FAA Improves GPS Coverage and Accuracy with Raytheon's GEO 5 Navigation Payload - RF Cafe"The US FAA's Geosynchronous Earth Orbiting 5 Wide Area Augmentation System navigation payload, developed by Raytheon is now operational and fully integrated into the WAAS network. The GEO 5 payload joins two others already in orbit to correct GPS satellite signal ionospheric disturbances, timing issues, and minor orbit adjustments, giving users increased coverage, improved accuracy, and better reliability. According to Matt Gilligan, VP of Raytheon's Navigation, Weather and Services mission area, GPS alone can't meet the FAA's stringent requirements for accuracy, integrity and availability ..."

Monday 2

Siemens to Build Self-Sufficient Smart Microgrid in Finland

Siemens to Build Self-Sufficient Smart Microgrid in Finland - RF Cafe"Siemens will design and build a smart medium-voltage microgrid, the corresponding grid automation system and an electrical storage system as part of the LEMENE project near Tampere. After the microgrid is built, industrial businesses in the area can connect to the distributed energy system and can take part in different energy markets. If necessary, the energy system is also capable of independent off-grid operations by disconnecting from the national grid. 'Our goal is to create an energy community ..."

Room Acoustics for Stereo and Entertainment Systems

Room Acoustics for Stereo and Entertainment Systems, February 1960 Electronics World - RF CafeHome entertainment is as big of a deal (or bigger) today as it was in the 1960's and 1970's when high fidelity personal sound gear was coming into the mainstream. Capability and features were going up while the price was coming down on really nice equipment. In order to achieve theater quality sound from your stereo and/or large screen television, thought and planning is essential or you will end up with a confusing mess of directed and reflected sounds. This article contains very valuable information on room configuration and sound absorbing materials and strategies. A fairly extensive table of common floor, wall, and ceiling sound absorption coefficients is provided, as are charts of reverberation times of various venues and volumes ...

Free Whitepaper: Surviving Electronic Component Shortages

Surviving Electronic Component Shortages - RF Cafe"Increased lead times and the threat of allocation have become a reality. We're in a major component shortage. The electronics industry is currently experiencing the most extreme component scarcity in over a decade. Lead times on passive components have drastically increased as a result, with some suppliers quoting as far out as mid-next year. The shortage and its impact is so widespread that the Electronic Components Supply Network (ECSN) is urging electronics buyers to 'review their outlook on lead times for components amid surging global demand and reports of allocation risks on certain products ..."

Transmitters Protect Wireless Data From Hackers

Transmitters Protect Wireless Data From Hackers - RF Cafe"Researchers from MIT have designed a type of transmitter that could protect wireless data from hackers. This new transmitter uses a method called 'frequency hopping' to keep hackers at bay, and could be a massive step forward regarding data protection. Frequency hopping is not in itself a new type of technology. This method sends each packet of data on a random and unique radio frequency channel. In theory, it prevents hackers from locating any particular piece of data. Unfortunately when it comes to larger packets the hops are markedly slower ..."

Sunday 1

RF Cafe Engineering Crossword Puzzle w/Weekly Headlines for July 1

RF Cafe Engineering Crossword Puzzle w/Weekly Headlines July 1, 2018At least 10 clues with an asterisk (*) in this technology-themed crossword puzzle are pulled from this past week's (6/25 - 6/29) "Tech Industry Headlines" column on the RF Cafe homepage. For the sake of all the avid cruciverbalists amongst us, each week I create a new technology-themed crossword puzzle using only words from my custom-created related to engineering, science, mathematics, chemistry, physics, astronomy, etc. You will never find among the words names of politicians, mountain ranges, exotic foods or plants, movie stars, or anything of the sort. You might, however, see someone or something in the exclusion list who or that is directly related to this puzzle's theme, such as Hedy Lamar or the Bikini Atoll, respectively. Enjoy ...

   

Windfreak Technologies Rohde & Schwarz RTM3000 & RTA4000 Oscilloscopes - RF Cafe
QuinStar - RF Cafe Antenna Test Lab - RF Cafe
About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2018
Webmaster:
    Kirt Blattenberger,
    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:  AirplanesAndRockets.com

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