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"Nothing spoils numbers faster than a lot of arithmetic!" - Peppermint Patty, December 4, 1968 PeanutsPeppermint Patty, December 4, 1968 Peanuts - RF Cafe

Today in Science History

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

Wi-Fi Alliance Mandates WPA3 for Device Certification

Samsung Q2 Profits up 26%

China Chips Lag Government Targets

• AirFuel Alliance Invites Participation in Global RF Wireless Charging Standard

TVA CEO Highest Paid Federal Employee @$8M/yr - Replacing Americans w/H1B

5G Smartphone Production to Exceed 200M Units in 2020

BAE Systems Acquires Raytheon's Military GPS for $1.9B (another U.S. business gone)

• FCC Shuts Down Boston Area Pirate Radio Stations

Huawei Leads in Smartphone Shipments for 1st Time

Tech and Business Related Anagrams

Tech and Business Related Anagrams - RF CafeHow's this for a great anagram? International Microwave Symposium = Comparatively Winsome Ruminations, or maybe Unwise Improvisational Commentary. I came up with that today when noting that IMS 2020 Virtual Event begins today. An anagram, BTW, is a word or words created from the letters of another word or words. Some results are very descriptive of the original subject (Western Union = No Wire Unsent and The Morse Code = Here Come Dots), but the best are results that mock (New York Times = Monkeys Write) or suggest the opposite of the original. Here's another: Electrical Engineer = Career Intelligence. There are many anagram finders out there, including AnagramMaker.com, which is the one I used to find my International Microwave Symposium anagram...

The 4G Decade: Quantifying the Benefits

The 4G Decade: Quantifying the Benefits - RF Cafe"According to a report by Recon Analytics and CTIA, 4G wireless networks powered remarkable economic growth and transformed the way Americans live and work. The study shows the powerful impact of wireless on the economy as American providers begin to rollout next-generation 5G networks, which will create a new 5G economy over the next decade. The report's key findings include that nearly 10% of the GDP increase of the entire U.S. economy from 2011 to 2019 was due to the growth of the U.S. wireless industry, and that U.S. 4G networks support 20 million jobs, drove nearly $700 billion in economic contribution last year alone, and save consumers $130 billion each year..."

Altum RF Products and Expertise at IMS2020 Virtual Conference

Altum RF Showcases Products and Expertise at IMS2020 Virtual Conference - RF CafeJoin Altum RF, a supplier of high performance RF to millimeter-wave semiconductor solutions for next generation markets and applications, at the IMS2020 Virtual Conference. Altum RF will showcase its featured products and technical expertise in its virtual booth. Company leaders will be online to answer questions about specific products, future plans and their decades of expertise designing and delivering RF, microwave and millimeter-wave semiconductors. New products featured in the booth include the ARF1307C7, a 1-20 GHz GaN distributed amplifier that delivers 10 W of saturated output power, and the ARF1010Q4, a 20-30 GHz 1 Watt amplifier for 5G millimeter-wave infrastructure and 24 GHz ISM applications...

The Amazing Collection in Thomas Edison's Garage

The Amazing Collection in Thomas Edison's Garage - RF CafeIf you think electric cars are a new idea, read on. I saw this article, "The Amazing Collection in Thomas Edison's Garage," on another website (the equivalent of Jay Leno's Garage from a century ago) and thought it was a special report, but then I noticed it was actually a paid promotion. So, I contacted the company, B.R. Howard & Associates, Inc., asking for permission to re-post it in its entirety on RF Cafe. They kindly agreed to it. Per their mission statement: "Our company focuses on the conservation of historic artifacts in accordance with the principles defined in the American Institute for Conservation of Historic and Artistic Works Code of Ethics and Guidelines for Practice." Their portfolio of projects include...

Deep Learning for Radar and Communications Automatic Target Recognition

Deep Learning for Radar and Communications Automatic Target Recognition - RF CafeArtech House today announced the release of Artech House today announced the release Deep Learning for Radar and Communications Automatic Target Recognition by U. Majumder, E. Blasch and D. This exciting resource identifies technical challenges, benefits, and directions of Deep Learning based object classification using radar data (i.e., SAR and High range resolution Radar / HRR data). An overview of machine learning (ML) theory to include a history, background primer, and example and performance of ML algorithm (i.e., DL method) on video imagery is provided. Radar data with issues of collection, application, and examples for SAR/HRR data and communication signals analysis is also discussed. Practical considerations of deploying such techniques, including performance evaluation, hardware issues, and the future unresolved issues are presented. Special intro price available for a short time.

Urgent Need !!!

Cree CMPA0060025F - RF CafeAn engineer friend wrote saying he is in immediate need of 50 pieces of the Cree CMPA0060025F, 25 W, 20-6000 MHz, GaN MMIC power amplifier. If you can supply any quantity, please contact me at kirtrfc@aol.com to let me know. Time is of the essence. Thank you very much!

Many Thanks to Exodus Advanced Communications for Their Support

Exodus Advanced Communications - RF CafeExodus Advanced Communications is a multinational RF communication equipment and engineering service company serving both commercial and government entities and their affiliates worldwide. Power amplifiers ranging from 10 kHz to 51 GHz with various output power levels and noise figure ranges, we fully support custom designs and manufacturing requirements for both small and large volume levels. decades of combined experience in the RF field for numerous applications including military jamming, communications, radar, EMI/EMC and various commercial projects with all designing and manufacturing of our HPA, MPA, and LNA products in-house.

Why Tubes Fail Prematurely

Why Tubes Fail Prematurely, September 1958 Radio & TV News - RF CafeAfter reading so many articles about vintage vacuum tube radios and TVs in the older electronics magazines, it makes me appreciate the relatively trouble-free products we enjoy today thanks to semiconductor technology. Monthly columns were filled with troubleshooting advice and tips for making modifications to factory designs that will enhance performance and/or reduce the likelihood of premature failure. Although many tubes did outlast the lifetime of the chassis in which they were installed, it was pretty much a given expectation that sooner or later some tubes would need to be replaced - that is why they were the only components that came installed in sockets for easy removal and installation. Fortunately, because of the huge volumes produced, prices were relatively low, and many stores - not just electronics shops - had self-serve...

Cubesats Close Proximity Operation

Cubesats Close Proximity Operation - RF Cafe"With some technical panache, one of The Aerospace Corporation's CubeSats maneuvered itself within 22 meters of its sibling CubeSat and snapped a series of photos while orbiting at 17,000 miles per hour. This incredibly difficult technology demonstration, performed by a satellite the size of a tissue box, paves the way for future inspection or servicing missions. 'AeroCube-10 is by far the smallest spacecraft to have accomplished a rendezvous and proximity operation so close,' said Catherine Venturini, an Aerospace Senior Project Leader and team lead..."

Promote Your Company on RF Cafe for as Little as $40/mo.

Sponsor RF Cafe for as Little as $40 per Month - RF CafeRF Cafe typically receives 8,000-15,000 website visits each weekday and about half that on weekends. RF Cafe is a favorite of engineers, technicians, hobbyists, and students all over the world. With more than 13,000 pages in the Google search index, RF Cafe returns in favorable positions on many types of key searches, both for text and images. New content is added on a daily basis, which keeps the major search engines interested enough to spider it multiple times each day. Items added on the homepage often can be found in a Google search within a few hours of being posted. I also re-broadcast homepage items on LinkedIn. If you need your company news to be seen, RF Cafe is the place to be. Advertising begins at $40/month.

Thanks to TotalTemp Technologies for Continued Support!

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.

Radio Corporation of America Advertisement

Radio Corporation of America (RCA) Advertisement, April 1945 QST - RF CafeMost Ham radio operators know that Franklin D. Roosevelt issued an order during World War II that effectively suspended the hobby of amateur radio for the duration of the war. Many guys sold or donated equipment to the military and/or civil defense organizations out of a sense of patriotism. The Radio Corporation of America (RCA) gave a symbolic tip of the hat to them in this advertisement that I scanned from the back cover of my copy of the April 1945 QST magazine. Of course RCA pitched the ruggedness of its vacuum tubes in the process. By this edition's printing, there was a general sense that the war was nearing an end and eager Hams would not have to wait much longer to re-engage in their beloved hobby. Indeed, the next month Germany surrendered and four months after that Japan surrendered. WWII was over at long last...

MPDevice: RF & Microwave Circulators & Isolators

MPDevice - RF CafeMPDevice (MPD) has become a trustworthy and reliable company in the global RF market as a manufacturer of passive RF Devices. Included are attenuators and terminations, coaxial connectors, adapters, and cable assemblies, DC blocks, surge arrestors, power combiner / dividers, and directional couplers. The Korean Telecommunication market is now entering into the era of hyperconnected society. With continuous enhancement in R&D capabilities and quality control, MPD will continue in an effort to become the No. 1 technologically innovative company with a focus on the emerging 5G marketplace.

Communications Crossword Puzzle for August 2nd

Communications Crossword Puzzle for August 2, 2020 - RF CafeAugust 2nd's custom Communications Engineering crossword puzzle contains some words particular to radio, radar, analog and digital circuits, components, and other tech-themed words and clues. Each week for two decades I have created a new technology-themed crossword puzzle using only words (1,000s of them) 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, such as Hedy Lamarr or the Bikini Atoll, respectively...

Mac's Radio Service Shop: Barney Turns Inventor

Mac's Radio Service Shop: Barney Turns Inventor, February 1950 Radio & Television News - RF CafeIt has been a long time since I heard this saying: "Well, they always say that if you want to find out the best and easiest way of doing something, just put a lazy man at the job." Mac McGregor offered that line to his service shop technician Barney - in jest of course - when Barney explains his million dollar invention idea for a fool-proof vacuum tube tester that can be used by just about anyone. Mac's Radio Service Shop creator John Frye often used the monthly techno-drama to introduce some good ideas for new inventions and/or new methods for troubleshooting problems. Somewhere along the line I think I have seen an advertisement for a tube tester that used the automation concept dreamed up by Barney...

Cognitive Radios Will Go Where No Deep-Space Mission Has Gone Before

Cognitive Radios Will Go Where No Deep-Space Mission Has Gone Before - RF Cafe"How radios can use neural networks to adapt to alien environments. Space seems empty and therefore the perfect environment for radio communications. Don't let that fool you: There's still plenty that can disrupt radio communications. Earth's fluctuating ionosphere can impair a link between a satellite and a ground station. The materials of the antenna can be distorted as it heats and cools. And the near-vacuum of space is filled with low-level ambient radio emanations, known as cosmic noise, which come from distant quasars, the sun, and the center of our Milky Way galaxy. This noise also includes the cosmic microwave background radiation, a ghost..."

Electronic Photo Album Quiz

Electronic Photo Album Quiz, March 1963 Popular Electronics - RF CafeThis is a different type of electronics-related quiz from Quizmaster Robert P. Balin. Mr. Balin created many monthly quizzes for Popular Electronics magazine. Here you are provided a series of images and a list of men's first names, and you need to match the image to the name. There are nine in all. Sure, it's kind of hokey (especially B and I), but it is a good Friday afternoon challenge to help pass the time until the weekend begins. Enjoy.

Anatech Electronics Intros 2 New RF Filters

Anatech Electronics Intros 2 New RF Filters - 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. Our 902 MHz ISM cavity notch filter part number AE902N2246 is a high performance ISM band notch filter exhibiting a very sharp roll off and low insertion loss in the passbands below and above the notch portion. Notch frequency range is 892-912 MHz, notch rejection is ≥40 dB, passband low side of notch is DC-882 MHz, passband high side of notch: 922-2700 MHz. Part number AE18000SSH6615 has a cutoff frequency of 18 GHz and a passband frequency of 18~40 GHz. The passband insertion loss: ≤2.0 dB @18~19.5 GHz and ≤1.0 dB @19.5~40 GHz. Custom RF power directional coupler designs...

Tutorial: Half Band Filters

Tutorial: Half Band Filters - RF CafeI have to admit to not being familiar with half-band filters, so this article entitled "Tutorial: Half Band Filters" posted by Ain Rehman on the High Frequency Electronics website was a good introduction. Wikipedia defines the half-band filter thusly: "In digital signal processing, half-band filters are widely used for their efficiency in multi-rate applications. A half-band filter is a low-pass filter that reduces the maximum bandwidth of sampled data by a factor of 2 (one octave). When multiple octaves of reduction are needed, a cascade of half-band filters is common. And when the goal is downsampling, each half-band filter needs to compute only half as many output samples as input samples. It follows from the filter's definition that its transition region..."

Withwave: RF & Microwave Components

Withwave RF & Microwave Components - RF CafeWithwave manufactures an extensive line of metrology quality coaxial test cable assemblies, connectors (wave-, end-, vertical-launch, board edge, panel mount), calibration kits (SOLT), a fully automated 4-port vector network analyzer (VNA) calibrator, between- and in-series connector adaptors, attenuators, terminations, DC blocks, torque wrenches, test probes & probe positioner. Special test fixtures for calibration and multicoax cable assemblies. Frequency ranges from DC through 110 GHz. Please contact Withwave today to see how they can help your project succeed.

Anatech Electronics (RF Filters) - RF Cafe withwave microwave devices - RF Cafe
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About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
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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