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Today in Science History

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

• Could Japan Offer a 5G Solution?

Brexit Signatories Call on PM to Avoid "N Deal" or "Bad Deal

Chip Sector Provides Lifeline During Wuhan Flu Pandemic

China Aims to Complete Its Own Navigation System to Decrease Reliance on GPS

Men and Women Go Separate Ways in College Labs

• Army to Allow Users Access to Classified Info from Home (can't imagine any problems with that)

5G Continues to Expand Despite Wuhan Flu Pandemic

Hydrogel Cools Electronics, Uses Waste Heat for Power

• New Method to Control Electromagnetic Compatibility

Independence Day 2020 Radio Crossword Puzzle

Independence Day Radio Crossword Puzzle for July 5, 2020 - RF CafeThis week's custom RF Cafe crossword puzzle celebrates the 244th anniversary of the signing of the Declaration of Independence, and uses as a background the John Trumbull painting. Clues marked with an asterisk (*) are part of the theme. Each week for two decades, for the sake of all avid cruciverbalists amongst us, I have created a new technology-themed crossword puzzle using only words from my custom-created lexicon related to engineering, science, mathematics, chemistry, physics, astronomy, etc. 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, find someone or something in the otherwise excluded list directly related to this puzzle's technology theme...

Printed Radio Components

Printed Radios, September 1947 Radio-Craft - RF CafeAs I have written often, Hugo Gernsback was one of the electronics industry's most prolific authors, inventors, and innovators. In this 1947 article in his Radio-Craft magazine, he proposes using printed components in place of leaded resistors. In fact, he sold printed resistive cards through his Radio Specialty Company (Rasco) that could be cut into whatever size was needed to achieve the required amount resistance based on a certain ohms/square value. He also mentions creating printed inductors on Bakelite and even fashioning variable-coupling transformers with a pair of inductor plates sliding relative to each other, similar to capacitive "variometers" used for tuning RF circuits. Not to neglect the possibility of capacitors, Gernsback suggests possibly spraying a thin conductive coating on paper and then rolling multiple layers into a tubular form, achieving a smaller form factor per unit capacitance...

CMT Release Compact VNAs with Improved Performance

Copper Mountain Technologies Release Compact VNAs with Improved Performance - RF CafeCopper Mountain Technologies has released the new Compact S5045 and M5045 VNAs with a frequency range from 9 kHz to 4.5 GHz. Featuring a dynamic range of 130 dB typ. and measurement speed of 70 µs, these new Compact VNA offerings will effectively replace the functionality of the recently discontinued S5048, while delivering improved performance. The S5045 will come with the advanced software features engineers expect from CMT's S Series Compact VNAs. The M5045 will join the M Series line of Compact VNAs and include standard VNA software features in an economical package that excludes a number of advanced software features...

Northrop Grumman, Boeing Build C-Band Satellites to Clear 5G Spectrum

Northrop Grumman, Boeing Build C-Band Satellites to Clear Spectrum for 5G - RF Cafe"SES, leader in global content connectivity solutions, announced its selection of two U.S. satellite manufacturers, Northrop Grumman and the Boeing Company, to deliver four new satellites as part of the company's accelerated C-band clearing plan to meet the Federal Communication Commission's objectives to roll-out 5G services. Northrop Grumman will deliver two flight-proven GeoStar-3 satellites, each equipped with a high-quality C-band payload to deliver the superior customer experience that end users are accustomed to. The two satellites - SES-18 and SES-19 - will be designed, assembled and tested in Dulles, Virginia. The Boeing Company will deliver a pair of highly efficient all-electric 702SP satellites. The two satellites - SES-20 and SES-21 - will be manufactured and assembled in Los Angeles, California..."

Today, July 3, Marks the Beginning of The Dog Days of Summer

The Dog Days of Summer - RF CafeThe Dog Days of Summer, contrary to what many people believe, is named not to describe the hottest, most humid, most oppressive period of the year, but marks the astronomical point in time following the heliacal rising of the star system Sirius, aka the Dog Star in the constellation Canis Major. 40 days later, on August 11th, the Dog Days end. That also happens to be middle of summer (not midsummer), which is on or about August 6th. Never having been a proponent of summer, the end of the Dog Days has always meant we're closer to the end of summer than to the beginning, and autumn is on the way.

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. 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...

Google Technology & Science Doodles

Google Technology & Science Doodles - RF CafeDo you remember seeing a cool Doodle on the Google search page and would like to find it again? Would you like to see not only the Doodle that piqued your interest, but ALL of the Doodles that Google has ever published? You can do that, but what might be more useful would a page full of all the technology- and science-related Doodles (click large image below) or some other specific topic. Fortunately, there is an easy way to find what you want by going to the Google website and typing "google doodles" into the search box, or just go to www.google.com/doodles. Once you get there, enter the specific event that interests you. Since some events have Doodles in more than one year, add a year to your search to narrow down returns...

San Francisco Circuits: PCB Fabrications & Assembly Service

San Francisco CircuitsSF Circuits' specialty is in the complex, advanced technology of PCB fabrication and assembly, producing high quality multi-layered PCBs from elaborate layouts. With them, you receive unparalleled technical expertise at competitive prices as well as the most progressive solutions available. Their customers request PCB production that is outside the capabilities of normal circuit board providers. Please take a moment to visit San Francisco Circuits today. "Printed Circuit Fabrication & Assembly with No Limit on Technology or Quantity."

Transatlantic News

Transatlantic News, September 1947 Radio-Craft - RF Cafe"Transatlantic News" was a regular column in the 1940 issues of Radio-Craft magazine, written by their European correspondent Major Ralph Hallows. As the title suggests, it reported on happenings from across the pond. A couple items caught my attention in this edition. One is about one of the first instances of the prediction of existence of a D-Layer in the ionosphere based on radio signal propagation characteristics noted by operators. The article estimates a height of about 30 miles, while the modern definition of the D-Layer places it at between 60 km (37 mi) to 90 km (56 mi). It also has a piece describing a simple method for silver plating without the need for supplying an electrical current. It involves making a paste of silver chloride and cream of tartar...

It's All About the Antennas for 5G

It's All About the Antennas for 5G - RF CafeLou Frenzel has an article on the Microwave & RF website entitled, "It's All About the Antennas for 5G." He begins: "For 5G technology to function as expected in apps from factory automation to self-driving vehicles, multiple antennas must be properly implemented. When studying 5G NR operation, it's not immediately obvious that 5G meets all of the objectives of the 3GPP standard by using advanced antenna technology. Antennas are often overlooked and treated with indifference. After all, antennas are just that nuisance metal thing that you have to put on a radio to make it work. In the case of 5G, antennas play a major role in achieving the expected features and performance. The primary objectives of 5G NR..."

Please Welcome ISOTEC as an RF Cafe Supporter!

ISOTEC Corporation - RF CafeSince 1996, ISOTEC has designed, developed and manufactured an extensive line of RF/microwave connectors, between-series adapters, RF components and filters for wireless service providers including non-magnetic connectors for quantum computing and MRI equipments etc. ISOTEC's product line includes low-PIM RF connectors components such as power dividers and directional couplers. Off-the-shelf and customized products up to 40 GHz and our low-PIM products can meet -160 dBc with 2 tones and 20 W test. Quick prototyping, advanced in-house testing and high-performance. Designs that are cost effective practical and repeatable...

Radio Terms Illustrated

Radio Terms Illustrated, January 1947 Radio-Craft - RF CafeThe "Radio Terms Illustrated" comics was a pretty clever feature in Radio-Craft magazine in the 1940s. Readers submitted ideas about how words and phrases commonly used in electronics and communications could be rendered in comical picture form. Illustrator Frank Beaven, who did work for many magazines of the day, then put pen to paper to render the kinds of comics shown here. You will note that the first of the drawings, "Amplitude," is one which probably would not pass editorial review these days, but was de rigueur back in the days when men made up the vast majority of readers. By today's standards many advertisers would face a threat of boycott and a front-page apology would be demanded... and then the magazine would be forced out of business anyway. There is no satisfying "the mob." Utter destruction of the past is their goal. To show how extreme...

RF Cascade Workbook 2018

RF Cascade Workbook 2018 Is Available Now! - RF CafeRF Cascade Workbook 2018 is the next phase in the evolution of RF Cafe's long-running series, RF Cascade Workbook. Chances are you have never used a spreadsheet quite like this. It is a full-featured RF system cascade parameter and frequency planner that includes filters and mixers for a mere $45. Built in MS Excel, using RF Cascade Workbook 2018 is a cinch and the format is entirely customizable. It is significantly easier and faster than using a multi-thousand dollar simulator when a high level system analysis is all that is needed. An intro video takes you through the main features...

Alliance Test Equipment: Used & Refurbished, Purchase & Rental

Allied Test Equipment Products - RF CafeAlliance Test Equipment sells used / refurbished test equipment and offers short- and long-term rentals. They also offer repair, maintenance and calibration. Prices discounted up to 80% off list price. Agilent/HP, Tektronix, Anritsu, Fluke, R&S and other major brands. A global organization with ability to source hard to find equipment through our network of suppliers. Alliance Test will purchase your excess test equipment in large or small lots. Please visit Allied Test Equipment today to see how they can help your project.

Radio Inventions of Lee de Forest

Radio Inventions of Lee de Forest, January 1947 Radio-Craft - RF CafeAs is the case with most genius inventors who change the world, Lee de Forest's contribution to the world of electronics neither began with nor ended with his invention of the Audion amplifying vacuum tube. As detailed in many of the other articles published in the January 1947 edition of Radio-Craft magazine that commemorated the 40-year anniversary (see ToC), de Forest's path from a simple open flame type of demodulator to the ultimate design of the evacuated glass-encased Audion tube with plate, control grid cathode, and heater element required many years of trial and error. The stories were so captivating that I actually read every article in this edition. Eventually, I will have all of them posted. This particular piece by Fred Shunaman reports on some of the many other innovative, patented inventions of de Forest such as antenna transmission lines (twin lead and coaxial), radio signal detector...

RF Cascade Workbook 2018 by RF Cafe ConductRF Precision RF VNA Test Cables - RF Cafe
Lemos International Technologies Res-Net Microwave - RF Cafe
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Copyright: 1996 - 2024
    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 World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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