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Tech Industry Headlines - RF Cafe- Archive -

Galileo Capability Mandated in All Smartphones Sold in the EU

• FCC Casts an Eye North of 95 GHz

• Operators Face Local Opposition to 5G Small Cell Deployments

• Author Warns of Wireless Power Transmission Interference

5G Wireless Change Wave to Impact Every Industry

• NATO to Assess Potential Risk of Chinese 5G Equipment

German Watchdog Ignores MNO Objections to Proceed with 5G Spectrum Auction

• OneWeb Bags Another $1.25B for Global Satellite Mission

• Nanocrystal Factory for Mass Manufacturing Quantum Dots

RF Cafe Forums Archive

Thousands of old forum topics - still useful.

How Far Can You Go in Electronics Without a Degree?

How Far Can You Go in Electronics Without a Degree?, September 1957 Popular Electronics - RF CafeThis story reads like an infomercial for IBM, which it probably is. Of course infomercials had not been invented by 1957, so IBM was ahead of its time. The answer to the article's title, "How Far Can You Go in Electronics Without a Degree?" was the same 55 years ago as it is today: As far as your intellect and ambition will take you. Back then, as with today, few people could rise to the level of design engineer without a college degree. However, there are many aspects of electronics that requires no formal education at all if you possess the requisite skills. I never have bought into the feel-good lie about anyone being able to be whatever he or she wants to be. Some people simply cannot achieve the mastery necessary to do a particular job ...

Quantum Radio Can Detect Universe's Weakest Quantum Signals

Quantum Radio Detects Universe's Weakest Quantum Signals - RF Cafe"A new 'quantum radio' has been demonstrated that can detect the weakest signals allowable under quantum mechanics. Researchers have demonstrated how to detect the weakest radio signals allowed under quantum mechanics, opening the door to advances in radio astronomy and medicine, and physics. The Quanta in the Noise Researchers at Delft University of Technology (DUT) in the Netherlands have built a quantum circuit that allows them to listen to the faintest signal allowable under quantum mechanics, leading to possible advances in radio astronomy, medicine, and attempts to reconcile quantum mechanics and relativity ..."

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 ...

Engineering & Science Crossword Puzzle for March 24

RF Cafe Engineering & Science Crossword Puzzle March 24, 2019Since 2000, I have been creating custom technology-themed crossword puzzles for the brain-exercising benefit and pleasure of RF Cafe visitors who are fellow cruciverbalists. The jury is out on whether or not this type of mental challenge helps keep your gray matter from atrophying in old age, but it certainly helps maintain your vocabulary and cognitive skills at all ages. A database of thousands of words has been built up over the years and contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc. 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 ...

Hitachi Nuvistor Advertisement

Hitachi Nuvistor Advertisement, March 6, 1964 Electronics Magazine - RF CafeAccording to the somewhat limited unique information available about the "nuvistor" vacuum tube amplifier, it was superior to many glass-encapsulated vacuum tubes. Lower noise figure, smaller size, greater ruggedness, intrinsically shielded, and relatively higher operating frequency were the main marketing standpoint. RCA introduced the nuvistor in 1959, and shortly thereafter GE, started making them, and then by 1964 Hitachi was offering nuvistors. The manufacturing process, where the entire assembly was performed in a vacuum chamber, made nuvistors more expensive than competitor glass tubes. The nuvistor concept might have been big if transistors had not been making such rapid progress in supplanting most vacuum tubes. In fact, nuvistors (a portmanteau of "new" and "transistor") were supposed ...

Design PCBs for EMI, Part 2: Basic Stack-Up

Design PCBs for EMI, Part 2: Basic Stack-Up - RF Cafe"Part 1 of this series [by Kenneth Wyatt] described how digital signals propagate through PC boards. In part 2, we look at specific board designs to achieve low EMI. The biggest issue I see in my clients' board designs is poor layer stack-up. Reiterating the two fundamental rules from part 1 and realizing digital signals and power (transients) are electromagnetic waves moving in the dielectric layer, we see there are two very important principles when it comes to PC board design: Every signal and power trace (or plane) on a PC board should be considered a transmission line. Digital signal propagation in transmission lines is really the movement of electromagnetic fields in the space ..."

Smiths Interconnect Needs a Manufacturing Engineer

Smiths Interconnect Needs a Manufacturing Engineer - RF CafeSmiths Interconnect currently has a job opportunity for a Manufacturing Engineer. Smiths is always looking for curious minds. For new colleagues who want responsibility and relish a challenge. Those who would like to use their talents to help make the world safer, healthier, more efficient and more connected. Job Description: Develops and Implements production and assembly methodologies for High Reliability high frequency RF electronics used in commercial and military applications, Development of assembly fixtures and RF Test fixtures, Conducts manufacturability and variation analyses to insure that manufacturing process capability matches requirements, Analyzes design/build concepts to evaluate producible products, Root cause analysis, Continuous flow ...

Vector-Circuit Matching Quiz

Vector-Circuit Matching Quiz, June 1970 Popular Electronics - RF CafeThis vector circuit matching quiz will hurt the brain a little more than most of the ones that were printed in Popular Electronics magazine. In order to score well, it helps to visualize the circuits relative to where they would appear on a Smith Chart. Capacitive impedances lie in the bottom half and have negative phases (-s, -jω). Inductance lie in the upper half and have positive phases (s, jω). The familiar 'ELI the ICE man' mnemonic helps, too. Be sure to pay attention to the color of the vector arrow heads. Example: In a purely inductive circuit like #4, voltage leads current by 90°. Since phase rotation is CCW, you need to look for lettered phase diagram where the white arrowhead (voltage) is 90° ahead of the black arrow head ...

Microfabrication Modifies Semiconductor Material Atom-by-Atom

Microfabrication Modifies Semiconductor Material Atom-by-Atom - RF Cafe"To keep up with Moore's Law - an observation made in the 1960s that the number of transistors on an integrated circuit doubles about every two years - researchers are finding ways to cram as many transistors as possible onto microchips. The newest trend is 3D transistors that stand vertically, like fins, and measure about 7 nanometers across - tens of thousands of times thinner than a human hair. Tens of billions of these transistors can fit on a single microchip, which is about the size of a fingernail. A modified chemical-etching technique, called thermal atomic level etching (thermal ALE), was used to enable precision modification of semiconductor materials at the atomic level ..."

Custom MMIC Design Services: Off-the-Shelf and Custom MMICs

Custom MMIC Design Services - RF CafeCustom MMIC Design Services 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 can help your project ...

Z-Comm Intros 640 MHz Fixed Frequency Synthesizer

Z-Communications Intros 640 MHz Fixed Frequency SynthesizerZ-Comm announces a new RoHS compliant Fixed Frequency Synthesizer model SFS0640A-LF in the UHF frequency. The SFS0640A-LF is a single frequency synthesizer that operates at 640 MHz with an external 10 MHz reference and features a typical phase noise of -100 dBc/Hz, -105 dBc/Hz, and -124 dBc/Hz at the 1 kHz, 10 kHz and 100 kHz offsets, respectively. The SFS0640A-LF is designed to deliver a typical output power of 0 dBm with a VCO voltage supply of 5 Vdc while drawing 25 mA (typical) and a phase locked loop voltage of 3 Vdc while drawing 9 mA (typical). This Fixed Frequency Synthesizer ...

QuinStar Technology Seeking a Tester / Technician

Tester / Technician Needed by QuinStar Technology - RF CafeQuinstar Technology, an AS9100 certified aerospace hardware design and manufacturing company in Torrance, CA, is currently looking for an Tester / Technician to join our team! We are primarily looking for candidates with experience and/or background in RF/microwave testing. Preference will be given to those with relevant experience. Primary job responsibilities include testing of microwave components and associated duties. Employment is contingent upon successfully passing a background check and pre-employment physical and providing proof of eligibility to work in the U.S. ...

Introduction to Solid-State Devices and Power Supplies

Introduction to Solid-State Devices and Power Supplies (NEETS Module 7, pp1-10) - RF CafeThese NEETS training modules created by the U.S. Navy appear to have originally come out in 1990s and has been modernized a few times since then, so the information is fairly up to date. You will still find a lot of descriptions of vacuum tubes, but that is because even in 1998 the military still had a lot of legacy equipment that needed to be maintained. This particular module provides the student with an introduction to and history of semiconductor physics. The chapter runs a total of 62 pages so there's a lot of content ...

L-M, Sequans Develop LTE-over-Satellite Solution

LM, Sequans Develop LTE-over-Satellite Solution - RF Caf"The aerospace giant Lockheed Martin is working with Sequans Communications to develop new LTE for satellite technologies. The two companies are enabling LTE end user devices to connect directly to geostationary satellites in what they’re describing as a world-first achievement with wide application. 'Sequans has expertise adapting LTE technology for special purposes such as this one,' said Scott Landis, a director at Lockheed Martin, in a press release. 'Sequans engineers modified their existing LTE chips to enable a new LTE-to-satellite communication specification developed by Lockheed Martin. LTE to satellite represents an important breakthrough in mobility and ..."

Acoustic Surface-Wave Devices

Acoustic Surface-Wave Devices, March 1971 Popular Electronics - RF Cafe"Praetersonic" - now that's a word you don't run up against very often. It is a combination of praeter* (beyond) and sonic (related to sounds), or what more familiarly is called ultrasonic. If fact, praetersonics was the early term given to surface acoustic wave (SAW) piezoelectric devices. Amazingly, even as far back as the early 1970s, SAW filters were being fabricated that worked in the 40 MHz realm. This Popular Electronics article does a really nice job of introducing the basics of SAW and BAW (bulk acoustic wave) technology at the time it was coming into the mainstream. Lots of hurdles still needed to be overcome, like high insertion loss, difficult to control impedances and internal signal reflections, etc. As with many new technologies, pundits cast hopeful ...

ConductRF PFT33 Micro Flexible NanoRF Cables for VITA67.3

ConductRF PFT33 Micro Flexible NanoRF Cables for VITA67.3 - RF CafeConductRF's close partnership with TE in its development of its new Nano-miniature RF Solutions for VITA67.3 has put us in a great position to support your VPX RF cable assembly needs. We can support solutions up to the top frequencies of the new connector system. ConductRF's PFT33 Series of Micro Flexible Cable Assemblies has been designed directly with TE Connectivity involvement and in partnership to maximize the capabilities of TE's new Vita67.3 NanoRF VPX Modular connector system. ConductRF offers its soft FEP jacketed ø0.047"cable to facilitate maximum flexibility and provides solutions for jumper cables or assemblies to SMA, MCX ...

Many Thanks to BBTLine for Continued Support!

BBTLine - BroadBand Transmission Line Products - RF CafeBBTLine offers a unique patented combiner / splitter design that allows for more compact devices while maintaining low insertion loss, excellent return loss and excellent amplitude/phase balance. These are not standard Wilkinson-style RF splitters. 2-, 4-, and 8-way, broadband 0.5 - 6 GHz, low loss (0.7 dB @ 6 GHz), excellent amplitude / θ balance (±0.1 dB, ±1°), surface mount & connectorized. Please visit BBTLine today to see how they can help your project ...

Transtector Releases New Series of NEMA-Rated Weatherproof Enclosures

Transtector Releases New Series of NEMA-Rated Weatherproof Enclosures - RF CafeTranstector Systems, an Infinite Electronics brand, today released a new, comprehensive line of NEMA-rated weatherproof equipment enclosures that are engineered to securely protect mission-critical electronics and are available with same day shipping to meet crucial deadlines. The new TEF14-series includes 45 enclosure configurations and 15 essential accessories available for immediate shipment. The line features multiple configurations for global applications including industrial automation, SCADA, oil and gas, mining, transportation, public works, security and automation, and much more. Each enclosure provides vital protection for key electronic ...

Windfreak Technologies ConductRF Precision RF Test Cables - RF Cafe
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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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