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Homepage Archive - December 2019 (page 4)

These archive pages are provided in order to make it easier for you to find items that you remember seeing on the RF Cafe homepage. Of course probably the easiest way to find anything on the website is to use the "Search RF Cafe" box at the top of every page. About RF Cafe.

Homepage Archive Pages

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See Page 1 | 2 | 3 | 4 of the December 2019 homepage archives.

Friday 27

2020 Consumer Electronics Show: January 7 - 10

2020 Consumer Electronics Show: January 7 - 10 - RF CafeThe 2020 Consumer Electronics Show (CES), being held in Las Vegas, is only a couple weeks off (January 7-10). CES is the world's gathering place for all those who thrive on the business of consumer technologies. It has served as the proving ground for innovators and breakthrough technologies for 50 years - the global stage where next-generation innovations are introduced to the marketplace. Owned and produced by the Consumer Technology Association (CTA), it attracts the world's business leaders and pioneering thinkers. Alan Jope, of Unilever, is the keynote speaker ...

RF Superstore Adds New Power Divider / Combiner Line

RF Superstore Adds New Power Divider / Combiner Line - RF CafeRF Superstore is proud to announce the addition of our fifth new product category in 2019. The latest category launch includes 14 new part numbers for small size, low insertion loss RF power dividers / combiners, 3 of which are in stock and ready to ship. Applications include amplifiers, mixers, antennas. and laboratory testing. If you have interest in pre-ordering the other model numbers, please contact us for current lead times. Pricing and availability for all power divider / combiner models can be found on the RF Superstore website. RF coaxial connectors & adapters, coaxial cable & cable assemblies, surge protectors, attenuators. Items added daily. Free shipping on orders over $99. We're leading the way again!...

Voltage-Multiplying Circuits

Voltage-Multiplying Circuits, January 1953 QST - RF CafeVoltage multipliers were found in nearly every form of battery-powered electronics in the days of vacuum tubes, because of the 100-volt or more requirement for plate voltages. Primary batteries in 30, 45, and 67½ volt sizes were produced by Eveready, Burgess, and a few other companies in order to help simplify biasing circuits. They were bulky and heavy, often comprising a significant portion of the assembly's volume. Heavy transformers contributed mightily to the weight and size as well. Exell still manufactures 30, 45, and 67½ V batteries both for the few products that are still designed to use them, and for vintage radio owners. Most circuits that need higher DC voltages these days use DC-DC converters, many of which are ICs...

Diamond Film Technology Improves Heat Dissipation in GaN HEMTs

Diamond Film Technology Improves Heat Dissipation in GaN HEMTs - RF Cafe"Fujitsu Limited and Fujitsu Laboratories have successfully developed the world's first technology for growing a diamond film with highly-efficient heat dissipation on the surface of gallium nitride (GaN) high electron mobility transistors (GaN HEMTs), which are used in power amplifiers for technologies like weather radars and communications equipment. The new design reduces the amount of heat generated by the devices during operations by 40%, leading to simplification of the cooling system and making it possible to miniaturize radar systems that rely on GaN HEMTs. This improvement to the design will make it significantly easier to install larger numbers of the devices for applications including improved weather forecasting and 5G communications ..."

Sound Level Charts & Data

Sound Level Charts & Data - RF CafeSound powers for the following equation in dBA units are referenced to a picowatt (10-12 W). The threshold of pain for the human ear is usually taken to be around 120 dBA. One of the best compilation of noise power level data can be accessed in Chapter 5 of the OSHA Technical Manual website. Loudness is the subjective human response to sound. It depends primarily on sound pressure but is also influenced by frequency. Three different internationally standardized characteristics are used for sound measurement: weighting networks A, C, and Z (or "zero" weighting). The A and C weighting networks are the sound level meter's means of responding to some frequencies more than others...

Copper Mountain Technologies: Vector Network Analyzers

Copper Mountain TechnologiesCopper Mountain Technologies develops innovative and robust RF test and measurement solutions for engineers all over the world. Copper Mountain's extensive line of unique form factor Vector Network Analyzers include an RF measurement module and a software application which runs on any Windows PC, laptop or tablet, connecting to the measurement hardware via USB interface. The result is a lower cost, faster, more effective test process that fits into the modern workspace in lab, production, field and secure testing environments.

Thursday 26

3-D Color TV for the Future?

3-D Color TV for the Future?, May 1958 Radio News - RF CafeYou can add to the long list of technical wonders promised - and not delivered - to us by the end of the twentieth century (this is now the 21st century, btw) a three-dimensional (3D) television set. This 1958 article from Radio & TV News magazine described efforts already made by the movie industry for generating 3D films that provided audiences with life-like projections that were designed to shock their senses by having scary or dangerous objects suddenly hurled at them. Pictures of a theater filled with people wearing the cardboard-framed red/blue stereoscopic glasses are a very familiar symbol of the scheme known as stereoscopy. Another method of 3D image perception was to use horizontal and vertical polarization along with appropriately configured glasses to separate the images entering the eyes and relying on the brain to convert a pair of 2-dimensional pictures into a 3-dimensional image...

Antenna Pattern Editor Software - Free Download

Antenna Pattern Editor Software - Free Download - RF CafeCenter of Telecommunication Technologies is proud to announce immediate availability of Antenna Pattern Editor 1.1, a free universal tool to view, create, edit and convert antenna patterns. The main idea embedded in the program is to provide the user with the opportunity to quickly create an antenna pattern file using various methods. Antenna pattern file is a simple text or xml file that describes the main characteristics of the antennas - radiation patterns, gain, frequency range, name, manufacturer and other data. These files are used in various radio planning tools including our RadioPlanner and MLinkPlanner. There are a large number of antenna pattern file formats, but it often happens that there is no file in the required format. In this case, using the Antenna Pattern Editor, you can easily convert the file to the format you need...

Many Thanks to ConductRF for Continued Support!

ConductRF coaxial cables & connectors - RF CafeConductRF is continually innovating and developing new and improved solutions for RF Interconnect needs. See the latest TESTeCON RF Test Cables for labs. ConductRF makes production and test coax cable assemblies for amplitude and phased matched VNA applications as well as standard & precision RF connectors. Over 1,000 solutions for low PIM in-building to choose from in the iBwave component library. They also provide custom coax solutions for applications where some standard just won't do. A partnership with Newark assures fast, reliable access. Please visit ConductRF today to see how they can help your project! 

Crosley Roamio Automotive Superhet Models 95 and 96 Radio Service Data Sheet

Crosley Roamio Automotive Superheterodyne Models 95 and 96 Radio Service Datat Sheet, April 1933 Radio-Craft - RF CafeAs in the past, I am posting these Radio Service Data Sheets as a service to someone who might be doing research on vintage radios and/or restoring one. Roamio is not producing automobile radios anymore, but they do now make TiVo recorders and streaming media players. The Crosley Roamio Automotive Superheterodyne Models 95 and 96 was made in the early 1930s at a time when cars and trucks were just starting to experience such luxury. Those sets had the power supply and RF receiver components mounted in the trunk and/or under the seat, with the operator interface controls (tuning and volume) mounted in the dashboard. Crosley did not begin manufacturing its own line of cars until 1939, so none of these radios made it into Crosley autos...

Skyworks Intros the SKY85772-11, Wi-Fi 6 Front-End Module

Skyworks Intros the SKY85772-11, Wi-Fi 6 Front-End Module - RF CafeSkyworks Solutions is pleased to launch the SKY85772-11, a new addition to our family of front-end modules (FEMs) that are designed for growing retail, carrier and enterprise Wi-Fi 6 applications. The 5 GHz FEM offers best-in-class power and linearity for devices such as access points, routers and gateways. The module's logarithmic power detector allows for wide dynamic power range and its harmonics are FCC compliant, reducing filtering requirements. The solution also delivers 2 dB higher gain, improving linearity when compared to system-on-chip (SoC) architectures. The SKY85772-11 is also part of major transceiver reference designs...

Where Does 5G Conformance Testing Stand in 2020?

Where Does 5G Conformance Testing Stand in 2020? - RF Cafe"The 5G test cases presented here encompass RF characteristics, radio resource management (RRM), and protocol suites that work at the chipset, device, and base-station levels on sub-6-GHz and mmWave frequencies in both lab and field environments. The 5G test and conformance era is far more challenging than 4G wireless amid a broad range of new services and technology paradigms. There's a large matrix of test cases that vary widely, and these changes reinforce the importance of adequately validating the device performance on 5G networks as specified in the New Radio (NR) standard. The 5G conformance test spans RF characteristics, radio resource management (RRM), and communication protocol suites ..."

ERZIA: Microwave & mm-Wave Modular Amplifiers

ERZIA serves critical aerospace and defense missions by designing and manufacturing RF, microwave, and mm-wave amplifiers, integrated assemblies operating from low frequencies up to 100 GHz, and by providing high reliable satellite communications. The company was founded in 2002 to become a worldwide reference of advanced engineering, performance, reliability and ruggedness. Their catalogue of standard amplifier modules comprises more than 100 different models, having also a high capacity of customization for amplifiers and integrated assemblies. Some of products have space heritage and are used in aerospace, commercial, military and scientific systems, having a wide range of final applications.

Wednesday 25

Nanotube Digital Electronics to Replace CMOS

Nanotube Digital Electronics to Replace CMOS - RF CafeSome experts in the field of electronics engineering have suggested that the use of silicon complementary metal-oxide semiconductors (CMOS) will start declining rapidly by the end of 2020. Despite their predictions, a class of alternative materials that can effectively sustain the computational power of new devices, while maintaining good energy efficiencies is yet to be clearly established. Over the past few years, researchers have proposed several materials that could ultimately substitute current CMOS devices. Some of the most promising candidates ...

Triad RF Systems: RF/Microwave Amplifiers and Amplifier Systems

Triad 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. PA, LNA, bi-directional, and frequency translating amplifiers are available, in formats including tower mount, benchtop, rack mount, and chassis mount. "We view Triad more as a technology partner than a vendor for our line-of-sight communications product line." Please check to see how they can help your project.

Tuesday 24

Picosecond Laser Technique Sheds Light on Conductivity

Picosecond Laser Technique Sheds Light on Conductivity - RF CafeCanadian researchers use laser pulses to record frame-by-frame how electrons react with atomic vibrations in solids, revealing superconductivity mechanisms. New insights into superconductivity could be gleaned from the technique, discussed by physicists from the Stewart Blusson Quantum Matter Institute (SBQMI) at the University of British Columbia and their colleagues in Science. The researchers have developed a new extreme-ultraviolet laser source to enable a technique called time-resolved photoemission spectroscopy ... 

Modelithics Welcomes Chris DeMartino as Sales and Applications Engineer

Modelithics Welcomes Chris DeMartino as Sales and Applications Engineer - RF CafeModelithics® the leader in providing simulation models for RF, microwave and mm-wave devices, is pleased to welcome Chris DeMartino to the company as Sales and Applications Engineer. In this role, Mr. DeMartino will be responsible for technical support and application development for Modelithics products and services. He joins the Modelithics team from Informa PLC (formerly Penton Media), where he served as the editor of Microwaves & RF magazine. At this position, his responsibilities included generating technical content to serve the needs of the RF/microwave engineering community. Prior to assuming the role of editor of Microwaves & RF in May 2015, he was able to gain valuable experience in RF/microwave design and testing. DeMartino holds a M.S. degree in Electrical Engineering and has worked for several companies in the RF/microwave industry...

Transient Specialists: EMC, EMI, RFI Test Equipment Rentals

Transient Specialists specializes in EMC test equipment rentals and carries a complete line of ESD guns, surge immunity test equipment, and EFT generators. Rentals available for military (Mil-Std 461), automotive (ISO 7637), and commercial (IEC 61000-4) EMC testing. Flexible terms, accredited calibrations and technical support on EMC testing equipment offered. Equipment consists of top EMC Test System manufacturers, including Teseq, Thermo Keytek, EM Test and EMC Partner. Contact Transient Specialists today for your ESD / EMC / RFI testing needs.

Monday 23

U.S. Treasury War Bond Ad

U.S. Treasury War Bond Ad, December 1944 Radio News - RF CafeWar Bonds were used by countries, including the United States, Canada, Germany, and the United Kingdom, to help finance the expense of war without causing massive inflation caused by printing more money. Particularly during war times, governments were concerned with any amount of inflation since it would raise the cost of procuring necessary materials. A meme popularized (by the government) during World War II was, "Use it up. Wear it out. Make it do, or do without." Similar to how modern day Savings Bonds work, citizens bought the bonds at some fraction of the face value (typically 1/2 or 3/4) with a maturity date of 10, 20, or more years. On or after the maturity date, the bonds could/can be redeemed for the face value plus and amount of interest which might have accumulated during the period. I remember while in elementary school in the early--to-mid 1960s taking a dime to class each week to buy a stamp for a $25 savings bond. Those bonds matured in the mid 1980s and sat in a box...

Practical Antenna Design for Wireless Products

Practical Antenna Design for Wireless Products - RF CafeA special 25% discount is being offered for a limited time from Artech House publishers for the purchase of Practical Antenna Design for Wireless Products, a new book written by Henry Lau of Lexiwave Technology that features NI AWR software. This comprehensive resource covers the fundamentals and implementation strategies for practical antenna design and helps readers understand how to effectively use electromagnetic (EM) simulation for the design of real-world antenna products. Topics include PCB layout, component placement, and casing design. Design examples of wearable electronic products are presented. Available for purchase in hardback or digital download through Artech House (25% discount with promotional code NI25), or get it from Amazon.com.

RadioPlanner 2.1 Wireless Planning Software

RadioPlanner 2.1 Wireless Planning Software - RF CafeCenter of Telecommunication Technologies is proud to announce immediate availability of their RadioPlanner 2.1 wireless network software simulation tool for modeling microwave point-to-point (PtP) and point-to-multipoint (PtMP) links. Perform frequency planning of radio networks considering co-channel and adjacent channels interference, points calculation showing the profile of the path, losses, and levels of the signal and interference on co-channel and adjacent channels. You can import the measurement results of the received signal power levels for comparison with calculated values and adjust propagation model parameters, and save the result of the coverage calculation as an interactive web page or as a raster image. Flexibly adjust the layers on the base map, show custom vector layers. RadioPlanner 2.1 uses propagation models that include ITU-R P.1812-4 (for mobile and broadcasting), Longley-Rice (ITM) v 1.2.2 (for broadcasting only, for mobile coming soon), ITU-R P.1546-6 (for broadcasting only), and combined ITU-R P.528-3 + P.526-14 model (for aeronautical radio only...

Post Your Engineer & Technician Job Openings on RF Cafe for Free

Engineering Job Board - RF CafeRF Cafe's raison d'être is and always has been to provide useful, quality content for engineers, technicians, engineering managers, students, and hobbyists. Part of that mission is offering to post applicable job openings. HR department employees and/or managers of hiring companies are welcome to submit opportunities for posting at no charge (of course a gratuity will be graciously accepted). 3rd party recruiters and temp agencies are not included so as to assure a high quality of listings. Please read through the easy procedure to benefit from RF Cafe's high quality visitors ...

Electronic Map Reveals 'Rules of the Road' in Superconductor

Electronic Map Reveals 'Rules of the Road' in Superconductor - RF Cafe"Using a clever technique that causes unruly crystals of iron selenide to snap into alignment, Rice University physicists have drawn a detailed map that reveals the "rules of the road" for electrons both in normal conditions and in the critical moments just before the material transforms into a superconductor. In a study online this week in the American Physical Society journal Physical Review X (PRX), physicist Ming Yi and colleagues offer up a band structure map for iron selenide, a material that has long puzzled physicists because of its structural simplicity and behavioral complexity. The map, which details the electronic states of the material, is a visual summary of data gathered from measurements of a single crystal of iron selenide as it was cooled to the point of superconductivity ..."

The Christmas Equation

The Christmas Equation - RF CafeAn RF Cafe visitor sent this equation to me a few years ago. It can be found all over the Internet (including here), but I cannot determine a definite origin. Mathematicians claim that math can explain everything in the universe, which is not quite true. It can't for example, explain why my next-door neighbor is a junk hoarder. This Christmas equation does not appear to begin with a particular application; it looks like something from a set of textbook end-of-chapter problems. Even if you don't celebrate Christmas, it provides a secondary benefit by demonstrating rules for the manipulation of logarithms and exponents along with basic algebraic rearrangements of terms.

everythingRF: Their Name Says It All

everything RF Searchable Database - RF CafePlease take a few moments to visit the everythingRF website to see how they can assist you with your project. everythingRF is a product discovery platform for RF and microwave products and services. They currently have 227,460 products from more than 1210 companies across 285 categories in their database and enable engineers to search for them using their customized parametric search tool. Amplifiers, test equipment, power couplers and dividers, coaxial connectors, waveguide, antennas, filters, mixers, power supplies, and everything else. Please visit everythingRF today to see how they can help you.

Sunday 22

RF Cafe Engineering & Science Crossword Puzzle December 22, 2019

RF Cafe Engineering & Science Crossword Puzzle December 22, 2019Each week, for the sake of all avid cruciverbalists amongst us, I create a new technology-themed crossword puzzle using only words from my custom-created lexicon related to engineering, science, mathematics, chemistry, physics, astronomy, etc. This week's puzzle contains a special holiday message (clues with asterisks) to all RF Cafe visitors. You will never find among the words names of politicians, mountain ranges, exotic foods or plants, movie stars, or anything of the sort. You might, however, see someone or something in the exclusion list who or that is directly related to this puzzle's theme, such as Hedy Lamarr or the Bikini Atoll, respectively. Enjoy!...

Friday 20

Electronics-Themed Comics

Electronics-Themed Comics, December 1944 Radio News - RF CafeThere are few better ways to wind down a work week than with some good old-fashioned (literally) technology-themed comics. This three fifths of a handful of comics appeared in a 1944 issue of Radio News magazine. You need to know when looking at these scenarios that people in the 1940s cherished and revered their radio sets like people today do with their cellphones. Magical and supernatural attributes were assigned to them by some, especially the non-technically inclined. Entire families gathered around the radio in eager anticipation of the latest episode of "The Shadow," The Lone Ranger," "Little Orphan Annie," "Jack Benny," and "Inner Sanctum Mystery." BTW, if you want to experience the aura of old time radio shows, many of them are available for listening online on the Old Time Radio Catalog website and others...

KR Electronics (RF Filters) - RF Cafe
Innovative Power Products Passive RF Products - RF Cafe

Copper Mountain Technologies (VNA) - RF Cafe