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"Engineers operate at the interface between science and society." - Gordon Brown, MIT School of Engineering

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- Archives -

FCC Spectrum Auction Pushes Past $13B in Round 10

Scalable Production of Highly Crystalline Graphene Films

Semi Foundries to Grow 9% in 2016, Says IC Insights

Coffee Drinking Habits Can Be Written in Our DNA (C8H10N4O2)

Apple Tackles iPhone 1-Tap Spyware Flaws

98 Things Facebook Knows About You

Pothead Rats Get Lazy, Less Willing to Try Cognitively Demanding Tasks

EW Ideas Get Real at Army's Cyber Quest

Indian Smartphone Market Recovers After Successive Declines

China's Semiconductor Industry Worth $157B by 2020

Apple Accused of iPhone 6 'Touch Disease' Defect

Aemulus and Peregrine Collaborate to Advance High Frequency Testing

Aemulus and Peregrine Semiconductor Collaborate to Advance High Frequency Testing - RF CafeAemulus, a leader in automated test equipment (ATE) solutions, and Peregrine Semiconductor Corp., founder of RF SOI and pioneer of advanced RF solutions, announce their strategic partnership in the development of a new microwave frequency tester. Building on the success of Aemulus's Amoeba™ AMB7600 RF tester, this next-generation test solution will extend its support into microwave ..."

The Neglected Current-Squared Galvanometer

The Neglected Current-Squared Galvanometer, February 1931 QST - RF CafeGalvanometers are the basis for most analog type meter movements - remember those things? They work by having the current flowing through a fine wire coil armature generate a magnetic field that displaces an attached needle. Most galvanometers respond nearly linearly to applied current, and therefore are used in voltmeters and ammeters with simple resistor series and parallel configurations. The current-squared galvanometer, on the other hand, responds roughly linearly to power values. It can therefore be used in a transmitter output monitoring circuit, for instance, or within amplifier ...

Engineering Career and Job Hunting Advice for August 24, 2016

Engineering Career Advice Articles for August 23, 2016 - RF CafeLots of new job hunting, job improving, and job retention articles have been published since my last round-up in early July. The vast majority of articles are, IMHO, useless and appear to be written by people whose only job experience is writing employment advice for people who actually work. I'm guessing they'll ...
 - Communications Skills Needed to
    Advance an Engineering Career
 - How to Avoid the Job-Search
    Black Hole
 - How Einstein and Edison Solved
    Problems in Their Sleep
 - Quick and Easy Tips for Writing
    Attention Getting Emails  <more>

'Artificial Atom' Created in Graphene

'Artificial Atom' Created in Graphene - RF Cafe"In a tiny quantum prison, electrons behave quite differently as compared to their counterparts in free space. They can only occupy discrete energy levels, much like the electrons in an atom - for this reason, such electron prisons are often called 'artificial atoms.' Artificial atoms may also feature properties beyond those of conventional ones, with the potential for many applications for example in quantum computing. Such additional properties have now been shown ..."

Laser Slicing to Slash SiC Wafer Production Costs, Increases Yield

Laser Slicing to Slash SiC Wafer Production Costs, Increases Yield - RF Cafe"Dubbed KABRA (for Key Amorphous-Black Repetitive Absorption), the patent-pending process uses a focused laser to form an amorphous layer of SiC decomposed into its constituents silicon (Si) and carbon (C), which becomes the base point for separating the wafer through cleavage. While today's wafer production typically involves the use of multiple diamond wire saws ..."

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 ..."

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Amateur Radio Crossword Puzzle for August 28

Amateur Radio Crossword Puzzle for August 28, 2016 - RF CafeThis week's Amateur Radio crossword puzzle contains the usual collection of science, math, and engineering terms, and amateur radio. Words specifically pertaining to Ham radio have clues marked with an asterisk (*). You'll never be 'challenged' to know terms relating to movie stars, leaders of obscure countries, or archaic pottery making terms. Enjoy ...

VidaRF Intros 1 to 12.4 GHz 90° Degree 3dB Hybrid Coupler

VidaRF 1 to 12.4 GHz 90 Degree 3dB Hybrid Coupler - RF CafeVidaRF offers a new high performance hybrid coupler Model: VHC-10124A operating frequency 1-12.4 GHz. Type VSWR 1.30:1, Insertion Loss 1.0 dB and Isolation 20 dB minimum. Power handling Average ≤50 watt ; Peak ≤1 kW with SMA connectors, operating temp -55 to 85 °C. If required we could seal and paint to meet IP65 standards ...

Advances Get a Grip on Single Photons & Molecules

Advances Get a Grip on Single Photons & Molecules - RF Cafe"The Moscow Institute of Physics and Technology (MIPT) is probing cutting edge diamond technologies to emit single photons (for uncrackable cybersecurity) and graphene to detect single molecules . While experts around the world are also addressing these angstrom scale problems, few laboratories are making headway in both. Dmitry Fedyanin, a researcher from MIPT's Laboratory of Nano ..."

Radio Controlled Flight

Radio Controlled Flight, January 1947 Radio News - RF CafeEven though the U.S. Army Air Force and other research agencies around the world were at the forefront of experimenting with remote control airplanes, helicopters, and rockets, hobbyists were forging their own paths in the electronic art. I did not know until reading this article that drones were flown through the radiation field at the Bikini Atoll atom bomb test site for data collection. In fact amateur radio operators have long had the privilege of broadcasting for the purpose of remotely controlling a vehicle - the only scenario of Earth-based* transmission whereby the 'control operator' is not required ...

Covalent Organic Frameworks Promise Huge Energy Storage Potential

Covalent Organic Frameworks Promise Huge Energy Storage Potential - RF Cafe"A powerful new material (COF) developed by Northwestern University chemist William Dichtel and his research team could one day speed up the charging process of electric cars and help increase their driving range. 'Our material combines the best of both worlds - the ability to store large amounts of electrical energy or charge, like a battery, and the ability to charge and discharge rapidly, like a supercapacitor ..."

Analog DNA Circuit Does Math in a Test Tube

Analog DNA Circuit Does Math in a Test Tube - RF Cafe"Often described as the blueprint of life, DNA contains the instructions for making every living thing from a human to a house fly. But in recent decades, some researchers have been putting the letters of the genetic code to a different use: making tiny nanoscale computers. In a new study, a Duke University team led by professor John Reif created strands of synthetic DNA that, when mixed ..."

Where the Tech Jobs Are: 2016

Where the Tech Jobs Are: 2016 - RF Cafe"The Class of 2016 will enter the most welcoming U.S. job market in nearly a decade: 67% of employers say they plan to hire recent college graduates this year, the highest number since 2007, according to job site CareerBuilder's annual forecast. Second only to business majors, freshly minted engineers are set to enjoy most of that hiring goodwill as the U.S. economy continues its slow-but-steady post-recession growth. According to a survey conducted by the National Association of Colleges and Employers, at the end of last year, 2/3 of company respondents were planning to hire engineers ..."

China Raises Cyber Stakes with Quantum Satellite

China Raises Cyber Stakes with Quantum Satellite - RF Cafe"China's successful launch of what is billed as the world's first hack-proof communications satellite promises to transform experimental ground networks into ultra-secure global links as China raises the stakes in its ongoing cyber rivalry with the west. The recent launch of the 1,400-pound quantum satellite aboard a Long March-2D booster opens the door to a new era of secure communications that leverages the ephemeral properties of quantum physics, including the mysterious phenomenon known as quantum entanglement ..."

Microsoft Excel Blamed for Gene Study Errors

Microsoft Excel Blamed for Gene Study Errors - RF CafeHere is an example of smart people doing dumb things and blaming it on anything other than themselves. I would be so embarrassed for being such a dummkopf who didn't understand a simple feature of the software, that I would never take it public and blame Microsoft. "Researchers trying to raise awareness of the issue claim that the spreadsheet software automatically converts the names of certain genes into dates. Gene symbols like SEPT2 (Septin 2) were found to be altered to 'September 2.' Microsoft said the gene renaming ..."

Own a Piece of Your Vocation's History & Support RF Cafe at the Same Time

Vintage Electronics Magazines for Sale - RF CafeMy 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. It is really interesting to peruse the pages of these old magazines and see what was considered cutting edge technology in the day ...

CW Room-Temperature Indium Arsenide Quantum Cascade Laser

CW Room-Temperature Indium Arsenide Quantum Cascade Laser - RF Cafe"University of Montpellier in France claims the first continuous-wave (cw) operation at room temperature of a 15μm indium arsenide (InAs) quantum cascade laser (QCL) [Alexei N. Baranov et al, Optics Express, vol. 24, p18799, 2016]. "To our knowledge, the longest emission wavelength of RT cw operation for QCLs fabricated from other materials is 12.4μm," the team reports. The thresholds are ..."

EDI CON USA Announces Amplifier Design Content

EDI CON USA Announces Amplifier Design Content - RF CafeEDI CON USA 2016, a conference that brings together engineers working on high-frequency analog and high-speed digital designs, taking place September 20-22 in Boston, Mass. at the Hynes Convention Center, announces its RF Amplifier Design track for this year's conference and exhibition. The exhibition will host more than 138 exhibiting companies from the RF, microwave, and high-speed digital industries, including demonstration pods in the Signal Integrity Zone. Featured keynote microwave and millimeter wave power amplifiers: technology, applications, benchmarks ...

ARRL Labs Called upon to Find Source of Strange RFI

Unintentional Source Causes Strange RFI - RF Cafe"After a strange series of reports were received regarding malfunctioning key fobs and disabled cellphone use all within an isolated area, city officials in Evanston, Illinois turned to the ARRL lab for help in investigating the cause of such odd interference. Originally, officials turned to the FCC with their concerns of intentional radio frequency interference (RFI) but because key fob malfunctions are considered the responsibility of the automaker the issue was not of ..."

Locating Your New Store

Locating Your New Store, April 1947 Radio News - RF CafeLocation, location, and location. Those are always half-jokingly cited as the most important three factors to consider when deciding where to best set up a retail business. Unfortunately, the days of scouting out a spot to set up an electronics sales and service shop are long gone. Except for a cellphone screen replacement service at a mall kiosk and maybe the Geek Squad desk at the Best Buy store, there are not many places left that do consumer electronics repair - at least as a primary vocation. This story makes a good read for anyone contemplating setting up shop where serving the local population is a prime objective ...

Skyworks' New Wi-Fi, Bluetooth®, ZigBee® RF Switches

Skyworks' New Wi-Fi, Bluetooth®, ZigBee® RF Switches - RF CafeSkyworks is pleased to introduce two new Wi-Fi switches that are ideal for WLAN networks, repeaters, ISM band radios, Bluetooth® systems, smartphones, and connectivity modules. The SKY13585-679LF is a single-pole, double-throw (SPDT) switch intended for 1 to 6 GHz applications. Using advanced switching technologies, this switch maintains low insertion loss and high isolation for all switching paths. The SKY13586-678LF is a single-pole, triple-throw (SP3T) antenna switch for 2.4 GHz Wi-Fi applications ...

Infineon Enables NFC Payment Ring

Infineon Enables NFC Payment Ring - RF Cafe"The ring is made by NFCring. 'Proximity payments based on NFC technology are clearly on the rise – and payment solutions with smart wearables will accelerate this trend,' says Infineon's Thomas Rostek. The global standard EMVCo facilitates worldwide interoperability and acceptance of secure payment transactions. Management of specifications and related testing processes is ..."

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