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Today in Science History

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

Huawei Hits Back at U.S.

• Vodafone UK Does Its Bit with Free Unlimited Mobile Data

Engineers in the Covid-19 Era

U.S. Chip Industry Lobbying to Stay Open Despite Virus Concerns

• FCC Extends 3.65 GHz CBRS Transition Deadline

• Prolonged Outbreak Presents Significant Problems to Telcos

Ultra-Secure, Jam-Resistant GPS M-Code Signal Underway

• Atlas 5 Launch Deployment of Ultra-Secure Military Communications Network

• Ofcom, UK Telcos to Launch National "Stay Connected" Campaign

Engineering & Science Crossword Puzzle for April 5

Engineering & Science Crossword Puzzle April 5, 2020 - RF CafeWorking crossword puzzles can be contagious. This April 5, 2020, tech-themed crossword puzzle may even go viral. It contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc., which I have personally built over nearly two decades. That includes the cause for our planet's current dilemma. Many new words and company names have been added that had not even been created when I started in the year 2002. You will never find a word taxing your knowledge of a numbnut soap opera star or the name of some obscure village in the Andes mountains. You might, however, encounter the name of a movie star like Hedy Lamarr or a geographical location like Tunguska, Russia, for reasons which, if you don't already know, might surprise you...

A Few Winning Words on Hi-Fi

A Few Winning Words on Hi-Fi, July 1963 Popular Electronics - RF CafeComics in modern magazines are a rather rare phenomenon for some reason, but they were fairly regular features up until a couple decades ago. This set of comics from the July 1963 edition of Popular Electronics deals with high fidelity (Hi-Fi) stereo equipment, which was considered somewhat exotic and high-end for many people's budgets in the day. Inexplicably (not), that is about the time that increases in hearing losses among younger people were first being noticed in audiograms.

Skyworks Ultra-Low Power FEM Features 4X Range Extension

Skyworks Ultra-Low Power Front-End Module Features 4X Range Extension - RF CafeSkyworks Solutions is empowering the wireless networking revolution. Skyworks is pleased to launch the SKY66404-11, a 2.4 GHz front-end module (FEM) designed for Zigbee®, Thread, and Bluetooth® (including Low Energy) ultra-low power IoT applications spanning sensors, beacons, smart meters and thermostats, wireless cameras, smoke and CO detectors, and wearables including medical devices. Featuring high-performance in a compact form factor, SKY66404-11 provides increased efficiency, and more than 4X range extension over previous models. The integrated module includes a power amplifier, low-noise amplifier, low-loss bypass path, transmit and receive switches, and digital controls compatible with 1.7 to 3.6 V CMOS levels...

Mary Burke, W3CUL Wins 1956 Edison Award

Mary Burke, W3CUL Wins 1956 Edison Award, April 1957 Radio & TV News - RF Cafe$5,000 in 1956 currency is equivalent to about $46,000 in 2020, per the U.S. Bureau of Labor Statistics' "Inflation Calculator." That is the value of the amateur radio equipment used by Mrs. Mary Burke in her work handling "an average of 3000 messages per month, principally for service personnel overseas." For her tireless wireless efforts, she was the first woman to win the coveted Edison Award Cup (sponsored by General Electric). Most of Mrs. Burke's communications was via Morse code, where she restrained herself to "about 30 words a minute to maintain accuracy". Way to go, Mary!

Wearable Device Camouflages Its Wearer Regardless of Weather

Wearable Device Camouflages Its Wearer Regardless of Weather - RF Cafe"Researchers at the University of California San Diego developed a wearable technology that can hide its wearer from heat-detecting sensors such as night vision goggles, even when the ambient temperature changes. It's a feat that current state of the art technology cannot match. The new technology can adapt to temperature changes in just a few minutes, while keeping the wearer comfortable. The device, which is at the proof-of-concept stage, has a surface that quickly cools down or heats up to match ambient temperatures, camouflaging the wearer's body heat. The surface can go from 10 to 38°C in less than a minute. Meanwhile, the inside remains at the same temperature as human skin, making it comfortable for the wearer. The wireless device..."

Electronic Design's 2019 Continuing Education Survey

Electronic Design's 2019 Continuing Education Survey - RF CafeElectronic Design's 2019 Salary & Career Survey asked readers, among other topics, what their attitudes were regarding continuing education. The main question in that sections was, "What are some of the ways in which you continue your engineering education?" I could not find the total number of respondents to the survey, but of those who did, 87% held a Bachelor's degree or higher. Among resources used to maintain currency in their professions, 60% say they use printed engineering & technology publications while 57% use similar websites. 60% use seminars and webcasts and 65% read whitepapers. 13% attend in-classroom instruction while 31% use online courses. About 45% of employers reimburse costs for seminars and trade shows, 32% pay for college courses, and 23% cover nothing at all. Click the link above for the full report, as well as to access the Job Satisfaction section from last week.

TotalTemp Technologies: Thermal Platforms for −100°C to +200°C

TotalTemp Technologies - RF CafeTotalTemp Technologies has more than 40 years of combined experience providing thermal platforms. Thermal Platforms are available to provide temperatures between −100°C and +200°C for cryogenic cooling, recirculating circulating coolers, temperature chambers and temperature controllers, thermal range safety controllers, space simulation chambers, hybrid benchtop chambers, custom systems and platforms. Manual and automated configurations for laboratory and production environments. Please contact TotalTemp Technologies today to learn how they can help your project.

Antenna Principles - Directional Arrays for 300 MHz and Higher

Antenna Principles, April 1947 Radio-Craft - RF CafeThis installment of the multi-month series of articles on antenna principles covers directional arrays for 300 MHz and higher. Keep in mind that in 1947 when this appeared in Radio-Craft magazine, wavelengths of a meter or less were considered to be at the upper end of the operational range. Parabolic reflector antennas were the domain primarily of ground-based installations due to the physical size and weight being prohibitive in airborne platforms, and even then they were rarely used at the time. Most ground and airborne installations were composed of dipole antennas with various configurations of reflector and director elements for desired gain and directivity characteristics. Special applications like for direction finding and longer wavelength radio communications used loop and long wire antennas, respectively. Highly directive dipole...

WithWave HFSS 3D Electromagnetic Connector Simulation Models

Withwave HFSS 3D Electromagnetic Connector Simulation Models - RF CafeWithwave offers ANSYS HFSS 3D EM(Electromagnetic) Simulation Model of board connectors and panel type connectors for customer design. These 3D models allows RF designers and engineers to simulate the RF performance of these connectors which is launched on various types of high frequency PCB. They can reduce time to assemble the connectors and verify the performance prior to placing an order. we hope to make a commitment to give customers better testing & Simulation environment. Design Assistance for ANSYS HFSS Models (version 17.0 or newer) for 3D EM Simulation and 3D Model for Mechanical Layout (STEP file)...

Bell Telephone Labs Project Echo

 Bell Telephone Laboratories Project Echo, November 1960 Electronics World - RF CafeEcho 1 launched in August of 1960, finally allowing America to participate in the Space Race, which until then was roundly being won by the USSR. Electronics magazines of the day were filled with prognostications of the future of space communications. Electronics World dedicated most of their November issue to satellite Earth stations and advancements being made in ultra sensitive receivers and powerful transmitters. Since the earliest satellites were literally metallic balls for reflecting radio signals, it was necessary to optimize both ends of the communications path since there were no circuits onboard the satellite to perform signal processing and re-transmission. Bell Labs, of course, was at the forefront of the technology. In fact a famously serendipitous discovery was made by a couple scientists in 1964 using the very antenna featured in this advertisement...

ConductRF Performance TSA89 Flexible RF Test Cables to 40 GHz

ConductRF Performance TSA89 Flexible RF Test Cables to 40 GHz - RF CafeManufacturing of all our products continues to operate at full capacity as part of the "Essential Business" community. Professional high frequency TSA89 series of RF test cables with performance to 40 GHz. Connector choices include; SMA, Type-N, 3.5mm, 2.92mm, & 2.4mm. Key features: High-frequency point to point cable, light weight rugged flexible cable, low loss <0.68 dB/ft @ 40 GHz, low VSWR < 1.35:1 (Typical < 1.25:1), RF leakage >-100 dB to 18 GHz, temperature rated from -55ºC to 125ºC. Cables are in stock and available immediately from Digi−Key. Here is an interview with ConductRF founder Dean Gammell.

Ultra-Low Threshold Continuous-Wave Lasing in GeSn

1st Ultra-Low Threshold Continuous-Wave Lasing in GeSn - RF Cafe"Transistors in computer chips work electrically, but data can be transmitted more quickly with light. Researchers have therefore been looking for a way to integrate a laser directly into silicon chips for a long time. A team of physicists at the Centre de Nanosciences et de Nanotechnologies (C2N), in collaboration with researchers at Germany's Forschungszentrum Jülich (FZJ) and STMicroelectronics, have implemented a new material engineering method to fabricate a laser microdisk in a strained germanium-tin (GeSn) alloy. They have demonstrated the laser device with a group IV compound, compatible with Silicon, operating with ultra-low threshold and under continuous-wave excitation. Optical data transmission enables significantly higher data rates and ranges than conventional electronic processes, while using less energy. In data centers, optical cables of a length of around 1 meter are therefore standard..."

A Coronavirus (aka Wuhan Flu) Pandemic Thought

A Coronavirus (aka Wuhan Flu) Pandemic Thought - RF CafeWakeup call to everyone: By Ana Swanson in the March 11, 2020 edition of The New York Times newspaper, "While the United States remains a global leader in drug discovery, much of the manufacturing has moved offshore. The last American plant to make key ingredients for penicillin announced it would close its doors in 2004. Chinese pharmaceutical companies have supplied more than 90% of U.S. antibiotics, vitamin C, ibuprofen and hydrocortisone, as well as 70% of acetaminophen and 40 to 45% of heparin in recent years, according to Yanzhong Huang, a senior fellow for global health at the Council on Foreign Relations..."

Custom MMIC: Off-the-Shelf and Custom MMICs

Custom MMIC- RF CafeCustom MMIC is a fabless RF and microwave MMIC designer entrusted by government and defense industry OEMs. Custom and off-the-shelf products include switches, phase shifters, attenuators, mixers and multipliers, and low noise, low phase noise, and distributed amplifiers. From next-generation long range military radar systems, to advanced aerospace and space-qualified satellite communications, microwave signal chains are being pushed to new limits - and no one understands this more than Custom MMIC. Please contact Custom MMIC today to see how they use their modern engineering, testing and packaging facility to help your project. 

Mac's Service Shop: Development of a Modern ECG

Mac's Service Shop: Development of a Modern ECG, January 1974 Popular Electronics - RF CafeProbably the first exposure most of us have had to an electrocardiogram (ECG) is from a television show or a movie. Earlier instances appeared in hospital settings in a patient's room or in the operating room. Around the time this installment of "Mac's Service Shop" appeared in Popular Electronics magazine (1974), the TV show "Emergency" introduced my generation to the field-portable ECG machine as deployed by Emergency Medical Technician (EMT) responders Johnny Gage and Roy DeSoto. I remember some of the first episodes had the emergency room doctors lamenting not having equipment available on the scene that could wirelessly send critical heart status parameters along with the standard fare of the victim's "vital signs." Then, one day a portable ECG unit was finally available, ostensibly revolutionizing the profession...

Keysight Technologies Launches Innovate Anywhere Program

Keysight Technologies Launches Innovate Anywhere Program - RF CafeKeysight Technologies, a leading technology company that helps enterprises, service providers and governments accelerate innovation to connect and secure the world, has launched the Innovate Anywhere program in response to COVID-19, spanning three key areas: 90-day software trials, remote learning, and scalable live network testing. "At Keysight, we are committed to helping customers maintain their engineering productivity no matter where they are working," stated Marie Hattar, CMO at Keysight. "We recognize COVID-19 is causing drastic changes across the globe, in our communities, our homes, and our workplaces. We want to help provide a sense of normalcy and enable customers to do what they do best: to innovate, from anywhere..."

Honeywell Soon to Release "Most Powerful Quantum Computer Yet"

Honeywell Soon to Release "Most Powerful Quantum Computer Yet" - RF Cafe"Honeywell says that it will release the world's most powerful commercial quantum computer by mid-2020. The U.S.-based manufacturer of scientific and commercial equipment says that the device is based on trapped ions, which is a different technology than that being pursued by most other commercial developers including Google and IBM. Honeywell researchers have published details of a smaller version of the machine that has a 'quantum volume' of 16 and say that it should be straightforward to scale this up to 64. The fundamental requirement for quantum computation is a set of quantum bits (qubits) that can interact to form quantum logic gates that process quantum information. In principle, quantum computers can perform certain computational task much faster than conventional computers. However, qubits tend to be very fragile so creating..."

Z-Comm 6.75 GHz VCO in MINI Package w/Exceptional Φ-Noise

Z-Communications 6.75 GHz CRO VCO in MINI Package Delivers Exceptional Phase Noise - RF CafeZ-Communications' new CRO6750X2-LF utilizes a doubled CRO oscillator design to cover the frequency range of 6750-6750 MHz within a tuning window of 0.5-4.5 Vdc. This new ceramic resonator VCO features phase noise of -101 dBc/Hz @ 10 kHz offset and is available in Z-COMM's standard MINI-16-SM package measuring 0.5 in. x 0.5 in. x 0.22 in. The CRO6750X2-LF is well suited for radar systems requiring optimal spectral purity. This unmatched VCO is configured to deliver output power of 0±3 dBm into a 50 ohms load and covers the operating frequency with a low Kvco figure of 5 MHz/V all while operating over the industrial temperature range of -40 to 85°C. It is specified to run off a 5.0 Vdc supply while drawing only 30 mA of current. The CRO6750X2-LF suppresses both the ½ and 2nd harmonic to better than -20dBc while limiting pulling...

CB Radio wave Propagation

CB Radio-Wave Propagation, December 1963 Electronics World - RF CafeRaise your hand if you have ever owned a CB (Citizens Band) radio. Waaaaay back before everyone carried a cellphone (pre-late-1990s), the most common form of unlicensed communication was CB radio. Actually, up through the mid 1970s you were supposed to purchase a license from the FCC, although no test was required as it was for amateur radio. My first CB was a 23 channel job that I installed in my 1969 Chevy Camaro SS, during my senior year in Southern Senior High School. It was right in the middle of big CB radio craze with CW McCall's "Convoy" song topping the U.S. Billboard charts. My self-appointed 'handle' was "RC Flyer." Most people had no idea what it referred to (radio-controlled model airplanes). Now that all cellphones use internal antennas, almost nobody even thinks of them as being radios. CB radios reminded you of their true nature by requiring that a 1/4-wave vertical antenna (typically with a loading coil to keep it shorter than its 27 MHz operational frequency...

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About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,
    BSEE - KB3UON

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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