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Today in Science History

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

Super Semiconductor: Stiff in Day, Bendy at Night

• CQ Announces 2018 Hall of Fame Inductees

• Highly Sensitive Encrypted Email at Risk of Exposure

• Ofcom Reveals UK Consumer Telecoms Value for Money is Improving (except see below)

• Britain's Broadband Speeds 51% Slower Than Advertised

• Google, Facebook, Others Press for 6 GHz Rulemaking

• New Material Reduces Losses in Inductive Components

• Global Ecosystem Integration Key China's Semiconductor Industry Growth

• Harris to Modernize India's ATC Communications Infrastructure

Electronics Still Thrives as a Hobby

Lou Frenzel Electronics Hobby - RF CafeLou Frenzel has posted a good article titled, "Electronics Still Thrives as a Hobby" on the Electronic Design website. While attending his local Maker Faire in Austin, Texas, he discovered some statistics on the cross-section of electronic hobbyists as gathered by the Jameco Electronics supply company, who sponsored the event. He expressed surprise at the average age of participants, but it actually comports well with that of many - if not most - hands-on (not including game controller and smartphone button pushing) types of hobbies these days ...

RF Cafe Morse Code Player Working Again

Morse Code page - RF CafeIf you look just beneath the RF Cafe page title, you will see the Morse code dits and dahs that represent this website's name. Click on it and you will be taken to the Morse Code information page, and therein is an audio player that will sound out the code for you. The music file was originally created in MIDI format in order to keep it as small as possible. At the time, all the web browsers supported MIDI files. Times have changed and now most browsers will not support them. I finally got around to converting the file to MP3 format, so now the embedded player will provide the intended code transmission ...

DARPA Project to Examine THz for Wireless Communications

DARPA Project to Examine THz for Wireless Communications - RF Cafe"It may be too early for the wireless industry to make major investments in spectrum above 95 GHz, but it is the right time for researchers to take a closer look at the spectrum and see where it might lead. ComSenTer is a newly formed hub for advanced wireless and sensing research founded by a consortium of industrial partners and the U.S. Defense Advanced Research Projects Agency (DARPA). ComSenTer researchers are developing technologies for the high gigahertz and terahertz spectrum that present opportunities for imaging and sensing capabilities at transmission speeds that are largely unheard ..."

Electronic Countermeasures - The Art of Jamming

Electronic Countermeasures - the Art of Jamming, December 1959 Electronics World - RF CafeDo you own one of those RFID-blocking wallets to keep your credit cards from being read unawares? If so, you are engaging in electronic countermeasures. Anyone interested in the history of electronic countermeasures (ECM) and electronic counter-countermeasures (ECCM) will benefit from this 1959 Electronics World article. ECM has been practiced as early as World War I when wireless communications was first used for military purposes. ECCM, of course, followed immediately on its heels. Electronic countermeasures range from simple jamming of receivers to emitting spoofing signals that fool receivers. In extreme cases ECM can destroy receiver front-ends by overdriving and burning out circuitry. ECM and ECCM ...

Thanks to Rigol for Their Continued Support

Thanks to Rigol for Their Continued Support - RF CafePlease express your appreciation to Rigol Technologies for their support of RF Cafe. Rigol's extensive line of products includes digital and mixed signal o-scopes, spectrum analyzers and RF signal generators, arbitrary waveform generators, power supplies, sensitive measurement products, and data acquisition systems. Applications include applications such as technical education, embedded design, WiFi integration, EMC, and manufacturing. Backed with a 3 year warranty and a 30 day no questions asked return policy ...

 

Normally-Off GaN Nanowire Transistors w/Inverted P-Channel

Normally-Off GaN Nanowire Transistors w/Inverted P-Channel - RF Cafe"Researchers based in Germany claim the first vertical GaN nanowire MOSFETs with an inverted channel, allowing a positive 2.5 V threshold voltage and giving enhancement-mode normally-off behavior. The high threshold was achieved by using p-GaN as the channel material. With 0 V on the gate, the channel blocks current flow. Increasing the gate potential inverts the channel, increasing the electron density and allowing transport. The team from Technische Universität Braunschweig, Universität Kassel and Physikalisch-Technische Bundesanstalt sees advantages from GaN ..."

RF Cafe Engineering Crossword Puzzle w/Weekly Headlines

RF Cafe Engineering Crossword Puzzle w/Weekly Headlines May 20, 2018At least 10 clues with an asterisk (*) in this technology-themed crossword puzzle are pulled from this past week's "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 ...

Bandwidth Efficiency Techniques Learned from Cave-Dwelling Fish

Bandwidth Efficiency Techniques Learned from Cave-Dwelling Fish - RF Cafe"A new light-based device, demonstrated recently by researchers, could mimic a fish's incredible Jamming Avoidance Response (JAR) ability. JAR is a behavior performed by some species of fish when their discharge frequencies are very similar, each fish will shift its discharge frequency to increase the difference between the two fish's discharge frequencies. By doing this, both fish prevent jamming of their sense of electroreception. Moving the frequency of an emitted signal away from other signals that could potentially cause interference can eventually help overcome the spectral bandwidth ..."

Electronic Factor Quiz

Electronic Factor Quiz, November 1966 Popular Electronics - RF CafeRobert Balin created this Electronic Factor Quiz for the November 1966 edition of Popular Electronics magazine. Your challenge is to match the drawing of a particular electronics circuit or implement with the corresponding "factor." Examples are "current amplification factor," "damping factor," "modulation factor," "duty factor," "form factor," "quality factor," etc. There are ten in all. Of course on a quiz like this you cannot get just one answer wrong - or any odd number for that matter. I managed to reverse #5 and #10 (I and B, respectively). For some reason I couldn't remember what "form factor" was, but was sure that #10 was a scale factor of sorts... wrong - a clear case of cranial rectumitis ...

PIM in Mobile Broadband Networks - Measurement and Management

PIM in Mobile Broadband Networks - RF CafeNigel Chapman and Fiona Wilson, of the UK's AceAxis, have authored a short paper titled, "PIM in Mobile Broadband Networks - Measurement and Management." "Passive Intermodulation (PIM) is an unpleasant side effect of the successful deployments of mobile networks, and is a problem that is growing in impact as complexity increases with the deployment of 4G and - in the very near future - 5G networks. PIM has the potential to degrade the efficiency of a cell site, and this network degradation directly impacts the edge of cell performance and/or the throughput of the cell site. What is PIM? PIM is a form of intermodulation distortion that occurs in components that are normally thought of as linear ..."

Mysterious Wireless Band Fits IoT Apps

Mysterious Wireless Band Fits IoT Apps - RF Cafe"Some useful frequencies are elusive or simply unknown to many engineers, so it wouldn't hurt to take some time and dig through the FCC 'bible' of federal regulations. If your application is relatively simple, you have even more choices than you know. Studying the FCC rules and regulations 'bible,' the Code of Federal Regulations (CFR) 47 Parts 15, 18, 95 and others you can discover some interesting possibilities. Of late, I learned of one alternative that fits basic industrial needs and eliminates the complexity of complying with some of the more well-known standards. This may be of interest if you're designing wireless applications ..."

Microtoroid Resonator Promises Reconfigurable On-Chip Light Routing

Microtoroid Resonator Promises Reconfigurable On-Chip Light Routing - RF Cafe"Researchers from AMOLF and the University of Texas have demonstrated a micrometer-sized optical circulator consisting of a silica microtoroid to which tapered optical fibers feed incoming light beams. In a paper titled 'Optical circulation in a multimode optomechanical resonator' published in Nature Communications, the researchers highlight that for the first time, an optical circulator was designed 'magnet-free,' relying on tiny mechanical vibrations imparted to a glass ring to directionally route light on an optical chip. 'Light propagation is symmetric in nature, which means if light can propagate from A to B, the reverse path is equally possible ..."

Comics: The Ham... As Seen by Walt Miller

Comics: The Ham... As Seen by Walt Miller, November 1965 Popular Electronics - RF CafeThis handful of Ham-related comics appeared in the November 1965 issue of Popular Electronics. One of them has an operator using "oboe" as the phonetic alphabet version of the letter "O." Having never seen that before, I did a search and learned that the British Forces in World War II uniquely used "oboe" for the letter "O." Maybe the artist, Walt Miller, was either a member of the British Forces or hung around (or served in the military) with someone that was. For that matter, using "able" for the letter "A" is also a British thing. The Silent English phonetic alphabet is interesting. I guarantee you'll appreciate the others as well, or double your money back ...

Many Thanks to Centric RF for Their Continued Support!

Centric RF microwave components - RF CafeCentric RF components - RF CafeCentric RF is a company offering from stock various RF and Microwave coaxial components, including attenuators, adapters, cable assemblies, terminations, power dividers, and more. We believe in offering high performance parts from stock at a reasonable cost. Frequency ranges of 0-110 GHz at power levels from 0.5-500 watts. Order today, ship today! Centric RF is currently looking for vendors to partner with them. Please visit Centric RF today ...

Sensitivity and PSRR Enhancement of RF Amplifiers

Sensitivity and PSRR Enhancement of RF Amplifiers - RF CafeMichael Hopkins, CurrentRF - RF CafeMichael Hopkins, founder of CurrentRF, published an article in High Frequency Electronics magazine titled, "Sensitivity and PSRR Enhancement of RF Amplifiers." Michael developed the RFDAC methodology and Current Reuse Mixer, and more recently, the PowerOptimizer and Silicon Supercapacitor methodologies and technologies. "Utilizing the Silicon Super Capacitor IP demonstrates a substantial improvement in analog and RF circuit sensitivity and signal cleanliness due to the additional effective capacitance the device and IP cell provide. With the increased effective capacitance per unit area ..."

Electronic Magic at the World's Fair

Electronic Magic at the World's Fair, July 1965 Popular Electronics - RF CafeMaybe it's just because black and white photos don't offer the visual stimulus of vivid color that we're used to seeing nowadays, but these images used to evoke a sense of awe and wonder at displays featured at the 1964 New York World's Fair don't quite hit the mark. Disney played a large role in the building of the displays. Audiovisual and robotic technology were the main themes of the event, and no doubt they were impressive at the time, although the recently posted video of Boston Dynamics' "Atlas" robot / humanoid running through a field puts General Electric's Progressland's "Grandpa" to shame. Each will give you a different kind of nightmare. Note Elon Musk's comment on "Atlas." Melanie and I went to Disney World / Epcot Center on our honeymoon in May of 1983, and saw what was billed as first walking, talking humanoids where Mark Twain ...

Transparent Curved Transistor Fabrication for Sensing and Imaging

Transparent Curved Transistor Fabrication Opens Door to Combined Sensing and Imaging - RF Cafe"Nanotechnologists at Oregon State University's College of engineering have developed a way of fabricating transparent transistors onto sharply curved surfaces, building on research to develop glucose sensors that can be wrapped around a tube. Although the research was originally directed towards diabetes treatments, and these may be an important application for the technique, it has potential for many other medical applications. The original research was intended to manufacture a catheter that could be inserted into the bloodstream of a diabetic patient to continuously measure glucose ..."

Noise Can Tell Much About Material

Noise Can Tell Much About Material - RF CafeJiri Polivka has an article in Microwaves & RF magazine that has a different type of topic - using noise to measure various properties of materials. Any time you can exploit an entity what would otherwise be considered wasteful and/or a nuisance it is a good thing. Says Jiri, "Noise can hide details, but it can also reveal them. If properly used, noise will tell a great deal about a device under test (DUT), including when a DUT is raw material. For example, the Microwave Noise Field (MNF) test method has the capability to test different objects that can move ..."

For How Long Will the USA Remain the Nobel Prize Leader?

For How Long Will the USA Remain the Nobel Prize Leader? - RF Cafe"Since first being awarded in 1901, most Nobel Prizes for science have gone to the U.S., the UK, Germany and France. An empirical study by Professor Claudius Gros from the Institute for Theoretical Physics at the Goethe University in Frankfurt has now shown that the Nobel Prize productivity in these countries is primarily determined by two factors: a long-term success rate, and periods during which each country has been able to win an especially large number of Nobel Prizes. For the study, Nobel Prizes for physics, chemistry and medicine were assigned proportionately, since up to three scientists can share ..."

Find the Hidden Electronics Components

Find the Hidden Electronics Components, July 1965 Popular Electronics - RF CafeIf you like word puzzles, then maybe you'll want to give this word search with names of common electronics components hidden within a matrix of random letter a go. It appeared in a 1965 issue of Popular Electronics magazine. Keep that in mind while searching for the Mystery Word. Enjoy ...

 

 

Thanks Once Again to Electro-Photonics for Long-Time Support

Electro-PhotonicsElectro-Photonics components - RF CafeElectro-Photonics LLC is a global supplier of RF & Microwave components. Our products include SMT hybrid and directional couplers, wire bondable passive components, filters, and very useful test boards for evaluating components (spiral inductors, single-layer capacitors). The Electro-Photonics team can support your small R&D design requirements with RF & Microwave test fixtures and save you valuable design and characterization time. Please take a moment to visit their website and see how your project might benefit ...

Cloaking Devices — Not Just for 'Star Trek' Anymore

Cloaking Devices — Not Just for 'Star Trek' Anymore - RF Cafe"Cloaking devices play a pivotal role in many sci-fi television programs. Scientists are now working to take this technology from the dramatic realm of science fiction and make it real. Amanda D. Hanford, at Pennsylvania State University, is taking the introductory steps to make acoustic ground cloaks. These materials redirect approaching waves around an object without scattering the wave energy, concealing the object from the sound waves. Hanford will describe the physics behind an underwater acoustic shield designed in her lab. Hanford and her team set out to engineer ..."

Author: Kirt Blattenberger on Google+ Author:
Kirt Blattenberger