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Today in Science History

Silicon Nanowire Springs Stretch, Keep Electrical Properties

Silicon Nanowire Springs Stretch, Keep Electrical Properties - RF Cafe"In a paper titled 'Deterministic Line-Shape Programming of Silicon Nanowires for Extremely Stretchable Springs and Electronics' published in the Nano Letters, an international team of researchers from Nanjing University, Peking University, and CNRS-Ecole Polytechnique has demonstrated a new route to designing silicon-based flexible electronics in a scalable way. Rather than starting from Si wafers cut-out from drawn silicon ingots, they describe in their paper a nanoscale-version of the crystal-pulling methods used to grow ..."

Quantum Radio for Communicating in Problematic Environments

Quantum Radio May Offer New Twist on Communicating in Problematic Environments - RF Cafe"Researchers at the National Institute of Standards and Technology (NIST) have demonstrated that quantum physics might enable communication and mapping in locations where GPS, cell phones, and radio is not reliable or don't work at all, such as indoors, in urban canyons, underwater, and underground. NIST announced the technology advance on January 2. The technology may have marine, military, and surveying applications. The NIST team is experimenting with very low frequency (VLF) digitally modulated magnetic signals ..."

Crystals for CB & Ham Communication

Crystals for CB & Ham Communication, March 1973 Popular Electronics - RF CafeAccording to author R.R. Freeland, manufacturing processes for radio-quality manmade crystals saw major improvements toward the end of World War II. At the time, the process was highly manual-intensive, as can be seen in this really nicely done 1940s video titled "Crystals Go to War." Prior to the use of crystals as frequency-determining devices, inductor-capacitor (LC) tank circuits were the dominant configuration. There were actually other frequency-determining schemes like spark gaps and even vibrating mechanical reeds. As you might guess, anything less than ...

Antenova High Performing 4G/LTE Diversity Antennas for Small PCBs

Antenova's New High Performing 4G/LTE Diversity Antennas for Small PCBs at CES - RF CafeAntenova Ltd, manufacturer of antennas and RF antenna modules, is showing a brand new pair of high performing 4G/LTE antennas which are suitable for PCBs as small as 60mm, at the consumer electronics show CES. The two antennas can also be used in 3G and MIMO applications. The two antennas are similar - the difference being that Inversa is built for the USA market while Integra is for European and Asian markets. Both antennas are available in left and right versions to provide more options for placement on the PCB, and can be used ...

RF Cafe Engineering Crossword Puzzle w/Weekly Headlines

RF Cafe Engineering Crossword Puzzle w/Weekly Headlines January 14, 2018At least 10 clues with an asterisk (*) in this technology-themed crossword puzzle are pulled from this past week's (1/8 - 1/14) "Tech Industry Headlines" column on the RF Cafe homepage (see the Headline Archives page for help). 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 ...

Five Traits of Highly Effective Engineers

Five Traits of Highly Effective Engineers - RF Cafe"Many engineers possess unique traits such as initiative and eagerness to learn that help make them more successful in their careers. Effective engineers use their resourcefulness and initiative to find solutions. They identify problems, but they aren't limited to finding, fixing, and troubleshooting. They assess their current situations and continually seek to improve upon the status quo. They listen and learn. They ask for ideas, consider possible solutions, and then synthesize opinions and facts to create appropriate responses. Here are some essential qualities found in the most successful engineers ..."

A Few More Electronics-Themed Comics

Electronics-Themed Comics, March 1969 Electronics World - RF CafeTGIF. If this past week has had you on edge, cheer up -the weekend's almost here. Once the final fire has been put out - or is at least contained - give yourself a break and enjoy these tech-themed comics from a vintage issue of Electronics World magazine. My favorite is the one on page 83 which is a takeoff on the well-worn comedy meme of the husband trying to sneak back into the house after a night out with the boys. This poor guy has been outwitted by his wife, who evidently has a bit of tech savvy working for her ...

Hybrid 3-D Printing Method for Flexible Electronics

Hybrid 3-D Printing Method for Flexible Electronics - RF Cafe"It is often said that 'two heads are better than one;' for the Air Force, leveraging the expertise and insights of academia has led to advances in materials development and processing destined to be a game changer for the future fight. A collaboration between scientists at the Air Force Research Laboratory and Harvard University's Wyss Institute for Biologically Inspired Engineering has resulted in a new method for digital design and printing of stretchable, flexible electronics. The process, called Hybrid 3-D printing, uses additive ..."

Wartime Solder

Wartime Solder, September 1942, Radio-Craft - RF CafePrior to the big push for leadless solder in the 1990s, probably 99% or more of the solder used by industry, tradesmen, and hobbyists contained lead. The 60/40 Sn-Pb (and 63/47) alloy, both with and without a rosin or acid core, was used for electrical work, electronics, plumbing, copper guttering, radiators, and many mechanical assemblies made of steel, brass, copper, tin, etc. Between World War I, "The War to [Not] End All Wars," and World War II, the electronics industry exploded in growth. All realms of society and government became utterly dependent on products assembled using solder. Both tin and lead were abundantly available ...

Saelig Intros Compact 6 GHz USB RF Vector Spectrum Analyzer

Saelig Introduces Compact 6 GHz USB RF Vector Spectrum Analyzer - RF CafeSaelig Company announces the availability of the Triarchy Technologies VSA6G2A Vector Spectrum Analyzer - an economical USB RF tool that plugs into the USB port of a PC and is controlled with the provided PC application software. It offers almost all of the functionality of a benchtop spectrum analyzer. Its frequency range of operation is from 100 Hz to 6.2 GHz, with an amplitude measurement range of -140 dBm to 24 dBm. The RBW (resolution bandwidth) range is from 0.2 Hz to 10 MHz and the noise level (DANL) is as low as -140 dBm. The VSA6G2A is very compact (4" x 1" x 1") and easy to use. The software user ...

Someone Is Already Stealing Panels from China's New Solar Road

Someone Is Already Stealing Panels from China's New Solar Road - RF Cafe"China has been leading the world in construction of solar energy plants, building dozens of new solar farms over the past few years. In addition to building standard solar farms, the country has also been experimenting with more innovative ways to draw energy from the sun. Recently, the city of Jinan built China's very first solar road, which lasted about a week until someone stole it. The road opened on December 28, and on January 2 an inspection team noticed a piece of the road was missing. The piece was small, measuring only 6 inches wide ..."

Webinar: Are You Ready for 5G? - Unlocking 6 Key Measurements

Webinar: Are You Ready for 5G? Unlocking 6 Key Measurement Challenges for 5G Radio Validation - RF Cafe
Are You Ready for 5G? Unlocking 6 Key Measurement Challenges for 5G Radio Validation. Date: January 24, 2018 Time: 1pm ET. Abstract: "The 5G New Radio era officially begins with the publication of 3GPP Release 15 in December 2017, which defines a 5G overlay onto the existing 4G networks. As 5G and emerging wireless standards continue to evolve, wireless designers need flexibility to troubleshoot leading-edge issues in a variety of spectrum bands as well as high performance for more rigorous R&D validation. Join Daren McClearnon, 5G ...

Semiconductor Blocks Heat Transfer and Preserves Conductivity

Semiconductor Blocks Heat Transfer and Preserves Conductivity - RF Cafe"Unique thermoelectric properties in cesium tin iodide could reduce heat buildup in electronic devices. A collective rattling effect in a type of crystalline semiconductor was discovered to block most heat transfer while preserving high electrical conductivity - a rare pairing that could reduce heat buildup in electronic devices and turbine engines. The traits were discovered in a class of materials known as halide perovskites, which are also considered promising candidates for next-generation solar panels ..."

Comsat Laboratories Needed Electronic Technicians

Comsat Laboratories Needed an Electronic Technicians, March 1969 Electronics World - RF CafeFor the benefit of RF Cafe visitors, I have posted at no charge to companies many employment announcements for engineers, technicians, managers, and other technical positions. This electronics technician job was located at COMSAT Laboratories' (Communications Satellite Corporation) Washington, D.C., facilities since 1969 was prior to when the then-futuristic-looking Clarksburg, Maryland, campus was established. In the early 1990s, I worked as an RF design engineer for a few years at COMSAT Laboratories in Clarksburg. About a decade earlier, before earning my BSEE degree, I was working as an electronics technician at ...

ConductRF RF Test Cables for Field Engineers

ConductRF RF Test Cables for Field Engineers 1/11/2018 - RF CafeConductRF's SiteFlex Range of ruggedized Field RF Test Cables are designed specially for Field Test Engineers working in applications that require on site RF Testing. These cables are directly compatible with handheld network and spectrum analyzers. Options include DC-7 GHz through DC-50 GHz. The ruggedized construction includes anti-torque connectors that are firmly attached to the cables external armor. Crush resistant SF cable can withstand 1,200 lbs./sq.in. Methuen, MA, is ConductRF's principle U.S. manufacturing location ...

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

A Note to Members from ARRL President Rick Roderick, K5UR

EU Outlines Supercomputer Plan

DARPA Looks to Radio for Better Network Resiliency

UK Telcos Make Record Compensation Payouts in 2017

Toy Vendor VTech Hit with FTC Fine for Child Privacy Breach

FCC Launching Full Inquiry into False Hawaii Missile Alert

OTA, Far-Field RF Charger Gets FCC Approval

Microsoft Tweaks Edge Browser in Wake of Meltdown, Spectre CPU Flaws

Nominations Sought for Philip J. McGan Memorial Silver Antenna Award

Qorvo® Selected for Qualcomm Cellular-V2X Automotive Reference Design

FCC Opens Era of Wireless Charging 'At-Distance'

China, Samsung Rise in U.S. Patents

QuinStar Technology Redefines State-of-the-Art Power

QuinStar Technology Redefines State-of-the-Art Power - RF CafeQuinStar Technology, a major supplier of millimeter-wave products for communication, announces that their R&D team has recently achieved a new milestone for GaN power amplifiers operating above 100 GHz. Using multiple GaN MMIC chips in a combiner network, we have achieved an output power of 3 W at 114 GHz. These GaN-based power amplifiers will soon be available for commercial applications ...

everythingRF Coverage of the Consumer Electronics Show (CES) 2018

everythingRF CES 2018 Coverage - RF CafeeverythingRF is providing up-to-the-minute coverage of events at the Consumer Electronics Show (CES) 2018. CES has been the launch pad for new innovation and technology for the last 50 years. The event is held in Las Vegas every year and is the world’s gathering place for everyone in the business of consumer technologies. It is where next-generation innovations are introduced to the marketplace. check in with everythingRF for news important to RF Cafe visitors ...

LG Rolling out Robots to Replace Hotel, Airport, Supermarket Workers

LG Rolling out Robots to Replace Hotel, Airport, Supermarket Workers - RF Cafe"A Korean tech giant on Thursday announced new robots that take aim squarely at the jobs of many services industry workers around the globe. There have long been predictions that advances in artificial intelligence and automation could end up eliminating millions of jobs over time, and tech companies have been testing robots to carry out a variety of tasks - from working in a pizza parlor to making deliveries that could greatly affect the services industry in the future. For its part, South Korean giant LG Electronics is the latest company that is ..."

Axiom Test Equipment New Year 2018 Specials

Axiom Test Equipment New Year 2018 Specials - RF CafeWhy rent test equipment from Axiom? Get test equipment without a capital budget. Tax benefits - the expense of a rental can be deducted immediately. Protects you against product obsolescence. Save time and money with quick delivery. Try equipment out before committing a lot of money to a purchase. Save time and money on maintenance costs (which are the responsibility of the rental company). Please contact Axiom today for your rental needs ...

4 Things to Consider Before Prototyping a PCB

4 Things You Must Consider Before Prototyping a PCB - RF Cafe"There's more to creating a PCB prototype than meets the eye. Do you have any PCB prototype successes or disasters that you would care to share with the rest of us? Many of my friends are involved in designing silicon chips in the form of ASICs, ASSPs, and SoCs, so if you say 'prototyping' to them, it means something very different to someone who wishes to create a prototype of a design that will be realized on a printed circuit board (PCB). In this column, we will consider four of the things that you really should consider before prototyping PCB ..."

Atomic Radiation: Types & Relationships

Atomic Radiation: Types & Relationships, May 1969 Electronics World - RF CafeNuclear energy was a big topic in the 1960s and 1970s as it was believed to be the future of electrical power generation for the world (at least up until the 3 Mile Island and Chernobyl incidents occurred). Ships and submarines were being powered by reactors that allowed them to run for months at a time without refueling, atmospheric emissions were practically zero, and the fuel source was abundant (albeit not simple to obtain). Medical and space applications were increasingly dependent on a greater knowledge of radiation and its effects on humans, plants, animals, and electronics. Many people by that ...

Author: Kirt Blattenberger on Google+ Author:
Kirt Blattenberger