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"Competition brings out the best in products and the worst in people." – David Sarnoff

Today in Science History

ConductRF RF Test Cables for Field Engineers

ConductRF RF Test Cables for Field Engineers 10/17/2017 - RF CafeConductRF's SiteFlex Range of ruggedized Field RF Test Cables are designed Field Test Engineers working in applications that require on site RF Testing. These cables are directly compatible with Hand-Held Network and Spectrum analyzers. Options include DC to 7 GHz through DC to 50 GHz. The ruggedized construction includes anti-torque connectors that are firmly attached to the cables external armor. Crush resistant SF series cable can withstand 1,200 lbs/sq.in ...

Quantum Spin Current Detection Potential for Alternative Electronics

Spin Current Detection in Quantum Materials Potential Alternative Electronics - RF Cafe"A new method that precisely measures the mysterious behavior and magnetic properties of electrons flowing across the surface of quantum materials could open a path to next-generation electronics. Found at the heart of electronic devices, silicon-based semiconductors rely on the controlled electrical current responsible for powering electronics. These semiconductors can only access the electrons' charge for ..."

Printed-Circuit Kits for Short Runs

Printed-Circuit Kits for Short Runs, October 1969 Electronics World - RF CafePrinted circuit boards (PCBs), especially high density and many layered, were still a relatively new technology in 1969. Point-to-point wiring was still a large part of most products in the commercial, military, industrial, and aerospace worlds. Producing artwork and contracting for a lot of PCBs was rather expensive, especially in small quantities. Many people, including me, made quite a few single- and two-sided boards using photoresist pens and self-adhesive tape and pads, then bathing them in an etchant solution of ferric chloride. Through holes were made on a drill press and then traces and pads were tinned with flux and solder ...

Nokia Plans to Conduct 90-96 GHz Tests

Nokia Plans to Conduct 90-96 GHz Tests - RF Cafe"At a time when much of the industry's attention has been on midband spectrum, Nokia is taking it up a notch by pursuing tests in the 90-96 GHz range. The vendor filed an application with the FCC asking for permission to conduct the tests over the course of two years at Nokia facilities in Murray Hill, New Jersey; Arlington Heights and Naperville, Illinois; and Sunnyvale, California. The application ..."

Teardowns Explore Bluetooth, Cellular IoT

Teardowns Explore Bluetooth, Cellular IoT - RF Cafe"TechInsights explored some of the Bluetooth and cellular IoT devices that it expects will dominate the Internet of Things for some time. Bluetooth 5.0 SoCs will be rapidly adopted by consumer IoT devices such as smartwatches and health and fitness products. Two emerging cellular IoT standards - narrowband IoT (NB-IoT) and Enhanced Machine-type Communications (eMTC) - will see wide applications in smart meters, bikes and other new emerging ..."

First American Made Quartz Watch

First American Made Quartz Watch, March 1972 Popular Electronics - RF CafeThis Bulova Accuquartz wristwatch is not the first quartz-controlled wearable timepiece; however, it was the first to be manufactured in the U.S. Interestingly, it is not a fully electronic watch because the quartz crystal stimulates a mechanical tuning fork which ultimately drives the hands. Bulova's first tuning-fork-driven "Accutron" was introduced in 1960. It sported a 360 Hz tuning fork that was stimulated by a pair of electromagnets ...

Keysight's Corporate HQ Damaged in California Wildfires

Keysight's Corporate HQ Damaged in California Wildfires - RF CafeUpdate: "The corporate headquarters of test company Keysight Technologies is shut down and suffered minor damage in the wildfires that have wiped out parts of Santa Rosa, California. Although a local news report claimed that the campus had been destroyed, the most recent update from the company said that as of Monday afternoon, 'all four main buildings are intact, although there appears to be some minor damage. Two modular structures and several automobiles suffered more ..."

Wireless Temperature Sensor Having No Electrical Connections

Wireless Temperature Sensor Having No Electrical Connections - RF Cafe"Robust, flexible, wireless temperature sensor based on SansEC. NASA Langley Research Center has developed a robust, wireless temperature sensor that does not require an electrical connection. The temperature sensor is built on NASA's SansEC sensor platform, which takes advantage of measuring dielectric changes. The temperature sensor is damage tolerant, wireless, flexible, precise, and inexpensive. One promising application is for tire temperature ..."

Saelig Introduces GW Instek GPM-8213 AC Power Meter

Saelig Introduces GW Instek GPM-8213 AC Power Meter - RF CafeSaelig Company has introduced the GW Instek GPM-8213 AC Power Meter, which has been designed specifically for power measurements on single-phase AC power supplies. This instrument offers high-accuracy voltage, current, and power measurement capabilities from both front- and rear-panel inputs, presenting users with clear, convenient, and accurate AC power measurements. The GPM-8213 provides 2 display modes in order to maximize its measurement usefulness. In the Standard Mode it simultaneously displays 8 measurement parameters; this is ideal for R&D and engineering ...

Pasternack Introduces New Cross Guide Couplers for C to K Bands

Pasternack Introduces New Cross Guide Couplers for C to K Bands - RF CafePasternack, a leading provider of RF, microwave and millimeter wave products, has introduced a new line of cross guide waveguide couplers with 4 port, 3 port and 2 port with coax interface that work across C to K bands. Typical applications include instrumentation, test benches, product development and characterization. Pasternack's new line of cross guide couplers consists of 160 parts in three sub-categories: cross guide couplers (4 waveguide ports), cross guide couplers with terminations (3 waveguide ports) and cross ...

Qualcomm Gets OK to Conduct 4.4-4.94 GHz 5G Tests in San Diego

Qualcomm Gets OK to Conduct 4.4-4.94 GHz 5G Tests in San Diego - RF Cafe"Qualcomm was granted FCC authorization to conduct experiments using a small 5G R&D development and demonstration network at 4.4-4.94 GHz in its hometown of San Diego. Specifically, the location is within a 0.5-mile radius of Qualcomm's campus in the Sorrento Valley area of San Diego. The authorization is effective until October 1, 2019. The application lists 30 mobile units and four base stations to be used in a test network that will use a single TDD 100 MHz channel ..."

Advertise on RF Cafe

Advertise on RF Cafe

RF Cafe typically receives 30,000-40,000 page views each weekday and about half that on weekends. RF Cafe is a favorite of engineers, technicians, hobbyists, and students all over the world. With more than 8,600 pages in the Google search index, RF Cafe returns in favorable positions on many types of keyword searches, both for text and images. New content is added on a daily basis. Advertising plans start at a mere $35 per month ...

MILCOM 2017 - October 23-25, Baltimore, Maryland

MILCOM 2017 (October 23-25, Baltimore) - RF Cafe"Now in its 36th year, MILCOM continues to be the premier international conference for military communications. At MILCOM, global military communications professionals face command, control, communications, computing, intelligence, surveillance and reconnaissance (C4ISR) challenges head on. They look at them from every angle and discuss them from end to end - research and development through future needs. The conference allows industry the opportunity to hear and understand the requirements, pace of change and state of play in a variety of C4ISR ..."

Many Thanks to Res-Net Microwave for Continuing Support!

Res-Net Microwave componentsRes-Net Microwave has a complete line of precision RF & microwave components including attenuators, terminations, resistors, and diode detectors for commercial, military, and space applications. Products range from the small flange type to large 2 kW connectorized power attenuators and/or terminations at frequencies up to 26.5 GHz. In-house photo etch and laser trim capability. Please check out Res-Net Microwave's website to see how they can help with your current project ...

'Krack' Hack Attack Threatens Every Wi−Fi Network

'Krack' Hack Attack Threatens Every Wi-Fi Network - RF Cafe"Every Wi-Fi connection is potentially vulnerable to an unprecedented security flaw that allows hackers to snoop on internet traffic, researchers have revealed. The vulnerability is the first to be found in the modern encryption techniques that have been used to secure Wi-Fi networks for the last 14 years. The so-called 'Krack' attack has been described as a “fundamental flaw” in wireless security techniques by experts. Apple, Android and Windows software are all susceptible to some version ..."

Many Thanks 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 ...

RF Cafe Engineering Crossword Puzzle w/Weekly Headlines October 15

RF Cafe Engineering Crossword Puzzle w/Weekly Headlines October 15, 2017For the sake of avid cruciverbalists amongst us, each week I create a new technology-themed crossword puzzle using only words related to engineering, science, mathematics, chemistry, physics, astronomy, etc. At least 10 clues in this puzzle with an asterisk (*) are pulled from this past week's (10/9 - 10/13) "Tech Industry Headlines" column on the RF Cafe homepage (see the Headline Archives page for help) ...

Mac's Service Shop: Fix It or Junk It?

Mac's Service Shop: Fix It or Junk It?, September 1969 Electronics World - RF CafeThere are not too many honest-to-goodness electronics repair shops around anymore - those where the proprietor uses multimeters, oscilloscopes, and signal generators to troubleshoot and align equipment. In fact, I would guess that most such shops do most of their business based on customers who find their services as the result of a Google search. You can find lots of cool videos of technicians demonstrating (and showing off) their collection of test equipment and solder rework stations - mostly for fixing vintage audio and video gear. Nowadays the smartphone screen replacement dude / dudette working from a kiosk in the shopping mall is considered an electronics ...

Stepped-Notch Airborne Sense and Avoid Radar Panel

Stepped-Notch Airborne Sense and Avoid Radar Panel - RF Cafe"An antenna designed for sense-and-avoid systems for unmanned aircraft may not only help open the national airspace to unmanned air vehicles but also transform the design of wide-bandwidth radar systems. The Airborne Sense and Avoid Radar Panel is seen during installation on a Twin Otter aircraft. Although unmanned aerial systems (UAS) have proven increasingly useful in a variety of applications - disaster response operations, land and crop surveys, aerial photography, and critical infrastructure protection ..."

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

New Study Shows That Cracked Phones May Be No Accident

TV Stocks Tumble After AT&T Cord-Cutting Disclosure

Sprint Touts 33% Network Speed Increase over Last Year

Massive Adoption of Laser Tech for Semiconductor Manufacturing

Google and Others Likely to Make Spectrum Sharing Easier

28% of Telcos Expect to Deploy 5G in 2018

WD to Offer 40 TByte Hard Drives

JOTA-JOTI Reports More Than 2,500 Registered for October 20-22 Event

Taiwan Hits Qualcomm with $773M Antirust Fine

Intel Delivers 17-Qubit Superconducting Chip

Carbon Nanotubes Bring Background Noise to Computation

Carbon Nanotubes Bring Background Noise to Computation - RF Cafe"Key to the stochastic-resonance device's constant buzzing of movement is the use of single-walled carbon nanotubes (SWNTs) in parallel and spanning chromium electrodes, and phosphomolybdic acid (PMo12) molecules [red and blue clusters]. It seems counterintuitive that background noise - like a white noise - could actually be used to help detect faint signals. But that's what happens in an unexpected phenomenon known as stochastic ..."

More Great Engineering Website Articles for October

More Great Engineering Website Articles for October - RF CafeOne article by Danny Rockett introduces an approach to selecting the most suitable battery for a mobile device. I have posted many of my own commentaries on the importance of critical battery selection based mainly on my use of various technologies in my flying models. Kickstarter and other startup funding websites are full of gizmos people have invented that are battery-powered, so it is not just the "big boys" who need to be concerned. Back in the early days of Bluetooth, I jokingly said that I should invest in battery company stocks because if the scheme took off, I would be rich in a couple decades due to all the wireless devices. Well, I didn't - but it did - and now I'm still not ...

Zero-Index Waveguide for Infinitely Long Wavelengths

Zero-Index Waveguide for Infinitely Long Wavelengths - RF Cafe"Researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) developed the first on-chip metamaterial with a refractive index of zero, meaning that the phase of light could be stretched infinitely long. The metamaterial represented a new method to manipulate light and was an important step forward for integrated photonic circuits, which use light rather than electrons to perform a wide variety of functions. Now SEAS researchers have ..."

Color Code Charts

Color Code Charts, October 1969 Electronics World - RF CafeIt has been over a year since I have worked on any old electronics gear, so the need for hand-dandy color code charts has not been at the top of my list for publishing. My bad. Every day there are untold thousands of people hard at work - although most wouldn't consider it work - restoring and maintaining a bit of world history. If you do a search on the RF Cafe website, you will find many types of color code charts that were published over the decades by the likes of Electronics World, Popular Electronics, Radio & TV News, Short Wave Craft ...

Triad RF Systems Intros a 6.4-7.1 GHz, 5 W SSPA for COFDM

Triad RF Systems Intros a 6.4-7.1 GHz, 5 W SSPA for COFDM - RF CafeTriad RF Systems announces the TA1167, a compact 5 W amplifier suitable for COFDM video links in the UAS and DTV broadcast space, covering 6,400 to 7,100 MHz. It's compact, efficient, design allows for camera-back installations or other applications that are SWaP constrained. The amplifier is capable of 1 W COFDM meeting -30 dB ACPR. Features include: Over / under / reverse voltage protection, optional heatsink, high speed On/Off control, and thermal shutdown ...

Memristor-Driven Analog Compute Engine Uses Chaos

Memristor-Driven Analog Compute Engine Would Use Chaos to Compute Efficiently - RF Cafe"When you're really harried, you probably feel like your head is brimful of chaos. You're pretty close. Neuroscientists say your brain operates in a regime termed the 'edge of chaos,' and it's actually a good thing. It's a state that allows for fast, efficient analog computation of the kind that can solve problems that grow vastly more difficult as they become bigger in size. The trouble is, if you're trying to replicate that kind of chaotic computation ..."

The Origin of Ohm's Law

The Origin of Ohm's Law, May 1972 Popular Electronics - RF CafeGeorg Simon Ohm's eponymous "law," i.e., Ohm's law, is perhaps the best-known formula in the realm of electricity and electronics. Although Mr. Ohm did not know it at the time, his conclusion holds up in both the macro and micro scale worlds of electron behavior. Voltage is equal to the product of a resistance and the current flowing through it, E = I * R. It is hard to believe that we have only had his result, announced in 1825, at our disposal for less than 200 years. A thorough grasp of Ohm's law is a minimum requirement for entry into the fields of electrical and electronics work; fortunately, only a fundamental grasp of algebra is required. Kirchhoff's law is a relatively easy next step. The big hurdle comes with wanting ...

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Kirt Blattenberger - RF Cafe WebmasterCopyright
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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 ...

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