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

ARRL Black Friday Sale

ARRL Black Friday Sale - RF CafeThe ARRL Store is having a Black Friday (and Saturday and Sunday) sale. Enter the coupon code of SAVETEN at checkout to save $10 on orders over $70. There are also buy-one-get-one-free deals and members-only pricing on some items. The 2018 ARRL Handbook for Radio Communications is supposed to be really nice with lots of new material. I haven't bought a new edition since 2012 - sure would make a nice present ;-) ...

NI AWR Webinar Highlights Design of IoT MIMO Antenna Using AntSyn

NI AWR Webinar Highlights Design of IoT MIMO Antenna Using AntSyn - RF CafeA Microwave Journal technical education webinar will highlight the use of NI AWR software products specifically Microwave Office circuit design and AntSyn™ antenna synthesis and optimization software, for designing a compact internet of things (IoT) dual-band Wi-Fi multiple-in-multiple-out (MIMO) array antenna. Presented by Dr. Derek S. Linden, director of technology for AntSyn at AWR Group, NI, the webinar will describe how to determine the initial specifications, explore the design space ...

Happy Thanksgiving!!!

"As God As My Witness, I Thought Turkeys Could Fly"

WKRP in Cincinnati: "As God As My Witness, I Thought Turkeys Could Fly" - RF CafeAnyone who watched the WKRP in Cincinnati sitcom back in the 1970s has to remember what was one of the funniest episodes ever. Here is the 5 minutes that made Prime Time history. In this Thanksgiving episode, station owner Arthur Carlson decided he would do a surprise good deed - that doubled as a promotional stunt - and drop live turkeys from a helicopter for lucky shoppers at the local shopping mall. Watch the disaster unfold as Les Nessman reports live, and then hear Carlson's final comment that is still used or alluded to in many ...

Please Visit Triad RF Systems to Thank Them for Their Support

Triad RF SystemsTriad RF Systems designs and manufactures RF power amplifiers and systems. Triad RF Systems comprises three partners (hence 'Triad') with over 40 years of accumulated knowledge of what is required to design, manufacture, market, sell and service RF/Microwave amplifiers and amplifier systems. "We view Triad more as a technology partner than a vendor for our line-of-sight communications product line." Please check to see how we can help your project ...

ConductRF D38999 Standard & Custom RF Solutions to 65 GHz

ConductRF D38999 Standard & Custom RF Solutions - RF CafeConductRF is offering standard D38999 RF coaxial cable assembly configurations with RF Contacts including; BMA to 20 GHz SMPM to 60 GHz Size #8 to 18 GHz Size #12 Mil-Spec. Size #16 Mil-Spec. Cable choice include Low Loss Flexible and standard RG styles. Custom marking and also ruggedization coverings including Nomex weave available ...

Qualcomm, ZTE, China Mobile Demo End-to-End 5G NR Interoperability Test

Qualcomm, ZTE, China Mobile Demo End-to-End 5G NR Interoperability Test"Qualcomm, China Mobile and ZTE combined their 5G expertise and demonstrated what's being described as the world's first end-to-end 5G New Radio (NR) Interoperability Data Testing (IoD) system with a data connection based on 3GPP Release 15. Conducted at China Mobile's 5G Joint Innovation Center, the demo used ZTE's 5G NR) system with a data connection based on 3GPP Release 15. Conducted at China Mobile's 5G Joint Innovation Center, the demo used ZTE's 5G NR) system with a data connection based on 3GPP Release 15. Conducted at China Mobile's 5G Joint Innovation ..."

Anatech Electronics November Product Update

Anatech Electronics Product Update November 14, 2017 - RF CafeAnatech Electronics offers the industry's largest portfolio of high-performance standard and customized RF and microwave filters and filter-related products for military, commercial, aerospace and defense, and industrial applications up to 40 GHz. Anatech has introduced a two new filters and a gas tube surge arrestor for your convenience: a surface mount 32.0 MHz SAW filter, a leaded 1.25 MHz crystal filter, and a cool-looking DC-3 GHz gas tube surge arrester with SMA connectors ...

UK Government Launches Year of Engineering

UK Government Launches Year of Engineering to Inspire - RF Cafe"UK government launches Year of Engineering campaign to inspire next generation of engineers. The UK government has pledged to work with hundreds of industry partners throughout 2018 to encourage young people and their parents to take a closer look at engineering. Launched in response to an estimated shortfall of 20,000 engineering graduates a year, and growing reports from industry that the skills shortage is having a significant impact on productivity and growth the so-called 'Year of Engineering' hopes to galvanise ..."

Mac's Service Shop: Leakage Current Testing and Using Square Waves

Mac's Service Shop: Leakage Current Testing and Using Square Waves, April 1973 Popular Electronics - RF CafeLong before any one was overly concerned with relatively paltry electrostatic discharge (ESD) current causing damage to semiconductor components, there was a need to model the human body's resistance to current flow due to electric shock concerns. Even with a huge number of people being severely shocked and/or killed due to exposure to potentially lethal voltage levels, it was not until the late 1960s that OSHA and the National Electric Code began requiring exposed metal components (chassis, switches, etc.) to have a safety ground connection. Popular Electronics ran an article titled "Shocking But True" in August ...

BBTLine Intros Surface Mount 8-Way RF Splitter / Combiner

BBTLine Intros Surface Mount 8-Way RF Splitter / Combiner - RF CafeBBTLine has introduced an 8-way, surface mount (SMT), RF Power Combiner / Divider. Shown to the right is a patented broadband 8-way surface mount (SMT) RF Splitter / Combiner. This RF splitter is not a typical Wilkinson-style device, but a design which yields a more compact splitter / combiner with excellent low loss RF characteristics and high power handling capability. • BroadBand 0.5 to 7 GHz Operation • Low Loss (<2.3 dB at 6 GHz) • Excellent Amplitude / Phase Balance (±0.3 dB, ±5°) • RoHs Compliant • High Power (>20 watts as splitter) ...

Deciding at What Age to Give a Kid a Smartphone

Deciding at What Age to Give a Kid a Smartphone - RF Cafe"It's the time of year when kids are thinking about their holiday wish lists. So what's a parent to do when a child, possibly a very young child, asks for a smartphone? We hear that smartphones can be addictive, that screen time can hurt learning, but can't these minicomputers also teach kids about responsibility and put educational apps at their tiny fingertips? To learn more, let's look at two families: one where smartphones are allowed for elementary to middle school-aged ..."

Germanium Better Than Silicon for Electronics?

Germanium Better Than Silicon for Electronics? - RF Cafe"Germanium, an elemental semiconductor, was the material of choice in the early history of electronic devices, before it was largely replaced by silicon. But due to its high charge carrier mobility - higher than silicon by threefold - the semiconductor is making a comeback. Germanium (Ge) is generally grown on expensive single-crystal substrates, adding another challenge to making it sustainably viable for most applications. To address this aspect, researchers at RPI demonstrate ..."

Farewell and Adieu, H. Ward Silver

Farewell and Adieu, H. Ward Silver - RF CafeAnother era, sadly, has come to an end. H. Ward Silver (aka Ward Silver, NØAX) has announced the end of his monthly column, "Hands-On Radio," in QST magazine. The title of each column was enumerated as "Experiment #nnn," followed by the subject. To wit, "Experiment #179 Maxwell's Equations - The Wave Emerges" is Mr. Silver's final column, appearing in the December 2017 QST. "Hands-On Radio" topics ranged in intensity from relatively simple discussion on calculating power dissipation in resistors, capacitors, and inductors to more heady treatises on subjects like electromagnetic fields within coaxial cable and waveguide to Maxwell's equations. Mathematics, too ...

Solid-State LSA Microwave Diodes

Solid-State LSA Microwave Diodes, February 1969 Electronics World - RF CafePrior to the advent of high frequency solid state devices like Gunn diodes, working at or above a couple GHz - even at low power - required the use of cavity oscillators such as klystrons and magnetrons. They were bulky, espensize and electrically very inefficient. This article outlines the theory of bulk oscillators as developed by Dr. John A. Copeland, of Bell Labs, and points out the peculiarities of the LSA (limited space-charge accumulation) mode that makes it possible to obtain 20 milliwatts of power at 88 GHz. Use of gallium arsenide (GaAs) enabled designers to construct receiver circuits into the mm-wave region without the need for klystrons, thereby reducing cost ...

'Twisted' Light Could Illuminate New Path for Wireless Communications

'Twisted' Light Could Illuminate New Path for Wireless Communications - RF Cafe"Scientists have taken an important step towards using 'twisted' light as a form of wireless, high-capacity data transmission which could make fiber optics obsolete. Scientists can 'twist' photons - individual particles of light - by passing them through a special type of hologram, similar to that on a credit card, giving the photons a twist known as optical angular momentum. While conventional digital communications use photons as ones and zeroes to carry information, the number of intertwined twists in the photons ..."

Free Engineering Magazines for Qualified Engineers & Technicians

Engineering White Papers & Books, November 2017 - 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 to qualified users through TradePub. 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 (literally) when you download one of these or the many other pubs available, so please help yourself ...

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

UK Government Announces Boost to R&D Spending

GaN Device Market to Grow at 4.6% CAGR to $22.47B in 2023

New Window into Electron Behavior

iPhone X Reportedly Assembled with Illegal High School Student Labor

Mysterious Signals Did Not Come from Missing Submarine

Worldwide Electronics Production Increasing Strongly Except in Taiwan

Women in Tech: 25 Profiles in Persistence

RadFxSat (Fox-1B) Launched Successfully, Designated AO-91

A New Window into Electron Behavior

ARRL Headquarters Closed for Thanksgiving on November 23 & 24

SIA 'Encouraged' by FCC Order on Bands Above 24 GHz

SIA 'Encouraged' by FCC Order on Bands Above 24 GHz - RF Cafe"So far, the FCC appears to have struck a balance between the goals of terrestrial wireless and satellite interests, at least based on early reads of the millimeter wave spectrum item it passed at its open meeting Thursday. The Satellite Industry Association (SIA) announced that it is initially encouraged by the FCC order regarding the future deployment of wireless services in spectrum bands above 24 GHz. In a news release, the FCC stated it will adopt rules regarding the use of spectrum ..."

Thanks Once Again to Electro-Photonics for Continued Support!

Electro-PhotonicsElectro-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 Electro-Photonics components - RF Cafeinductors, 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 ...

Reflections on the News, February 1969 Electronics World

Reflections on the News, February 1969 Electronics World - RF CafeReading through the news items in the vintage electronics magazines provides a mixture of important historical facts and figures along with some predictions on the future of the industry. Some of the predictions turn out to be amazingly accurate, even though in retrospect they might seem obvious. Take, for example, Sylvania VP Dr. Robert Castor's foresight about how, "the future growth of the semiconductor industry lies in a major switch from the production of individual components to solid-state subsystems that can be used as building blocks in electronic designs." "Well of course," you might be temped to say; however, at the time there were still significant hurdles to overcome related to material ...

Innovations in Jammer Technologies

Empower RF Systems Seminar: Pulse Shaping in High Power Solid State Jamming Amplifiers - RF CafeWebinar Title:  Pulse Shaping in High Power Solid State Jamming Amplifiers When: Thursday, November 30, 12 pm to 1:30 pm Location: Marriott Marquis Hotel Marquis Ballroom. Pulse shaping, as it is done today, is an effort to fix fidelity issues caused by the transmitting amplifier and is accomplished by a combination of imperfect methods, most external to the amplifier. In this technical session, Paulo Correa will describe a new high power amplifier architecture with built in real time feedback that is capable of matching the input signal shape, minimizing droop, overshoot, ringing, rise ...

RF Cafe Engineering Crossword w/Headlines:  November 19

RF Cafe Engineering Crossword Puzzle w/Weekly Headlines November 19, 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 (11/13 - 11/17) "Tech Industry Headlines" column on the RF Cafe homepage (see the Headline Archives page for help). Enjoy! ...

IBM Offers 20-Qubit Quantum Computer to Clients

IBM Offers 20-Qubit Quantum Computer to Clients - RF Cafe"IBM quantum computers with 20 superconducting qubits will soon be available for online use by the firm’s clients – according to the US-based company. The quantum systems will be running by the end of 2017 and IBM also says that it has built and tested a prototype quantum computer with 50 qubits. Part of the IBM Q family of quantum computers, the new systems are based on transmon qubits. These store quantum information in terms ..."

Apologies - No E-Mail Address Change After All

Earthlink offered a deal on keeping my original e-mail address, so I will be retaining the long-time after all. Please ignore the previously announced address. I apologize once again for any inconvenience. Please change your records as needed. Thank you.

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Kirt Blattenberger - RF Cafe WebmasterCopyright
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Kirt Blattenberger,

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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