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Berkely Nucleonics Academy

Homepage Archive - March 2020 (page 5)

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

2020:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2018:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2017:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2016:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2015:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2014:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2013:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec

See Page 1 | 2 | 3 | 4 | 5 | of the March 2020 homepage archives.

Friday 3

Thursday 2

Wednesday 1

Tuesday 31

Monday 30

Sunday 29

Engineering & Science Crossword Puzzle for March 29

Engineering & Science Crossword Puzzle March 29, 2020 - RF CafeThis March 29, 2020, tech-themed crossword puzzle contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc., which I have personally built over nearly two decades. 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...


Ham Radio Documentary Videos

  Ham Radio Documentary Videos  

Receiver Noise from Antenna to Detector

Receiver Noise from Antenna to Detector, August 1965 Electronics World - RF CafeHere from a 1965 issue of Electronics World magazine is a really nice write-up on electrical noise, both how it originates and how it affects receiver systems. Although vacuum tubes were still the predominant active amplification components in 1965 (the date of this article), semiconductors were already solidly ensconced in the signal detector role. I have to confess to learning a new term that I probably should be familiar with: Equivalent-Noise-Sideband-Input, or ENSI. It appears also in Reference Data for Engineers: Radio, Electronics, Computer, and Communications. Interestingly, this is the first time in a long time I have seen noise referred to as "grass;" the drawings make it clear why the moniker was created. We were taught to use "grass" in USAF radar tech school and used it in common parlance...

"Chirp" - A New Radar Technique

 "Chirp" - A New Radar Technique   

CB Radio wave Propagation

   CB Radio Wave Propagation  

Electronics-Themed Comics

  electronics-themed comics 

February 1967 Electronics World

February 1969 Electronics World

May 1961 Electronics World

Bell Telephone Labs Project Echo

  Bell Telephone Labs Project Echo  



Engineering Job Opening

Promote Your Company on RF Cafe for as Little as $45/mo.

Sponsor RF Cafe for as Little as $45 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 10,000 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 $45/month.

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. 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...

NEW - RF & Electronics Symbols for Visio

RF Electronics Wireless Analog Block Diagrams Symbols Shapes for Visio - RF CafeWith more than 1000 custom-built symbols, this has got to be the most comprehensive set of Visio Symbols available for RF, analog, and digital system and schematic drawings! Every object has been built to fit proportionally on the provided A-, B- and C-size drawing page templates (or can use your own). Symbols are provided for equipment racks and test equipment, system block diagrams, conceptual drawings, and schematics. Unlike previous versions, these are NOT Stencils, but instead are all contained on tabbed pages within a single Visio document. That puts everything in front of you in its full glory. Just copy and paste what you need on your drawing. The file format is XML so everything plays nicely with Visio 2013 and later...

Get Your Custom-Designed RF Cafe Gear!

Custom-Designed RF-Themed Cups, T-Shirts, Mouse Pads, Clocks (Cafe Press) - RF CafeThis assortment of custom-designed themes by RF Cafe includes T-Shirts, Mouse Pads, Clocks, Tote Bags, Coffee Mugs and Steins, Purses, Sweatshirts, and Baseball Caps. Choose from amazingly clever "We Are the World's Matchmakers" Smith chart design or the "Engineer's Troubleshooting Flow Chart." My "Matchmaker's" design has been ripped off by other people and used on their products, so please be sure to purchase only official RF Cafe gear. My markup is only a paltry 50¢ per item - Cafe Press gets the rest of your purchase price. These would make excellent gifts for husbands, wives, kids, significant others, and for handing out at company events or as rewards for excellent service. It's a great way to help support RF Cafe. Thanks...

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...


Millimeter-Scale Transceiver Boosts Ingestible Sensors

Millimetre-Scale Transceiver Boosts Ingestible Sensors - RF Cafe"Sensing from the inside A mock-up of an ingestible pill containing the wireless transceiver. Researchers at Imec, a Leuven, Belgium-based center for nanoelectronics and digital technologies, have developed a wireless receiver and transmitter small enough to fit inside a millimeter-scale capsule. The transceiver, which was presented at the International Solid-State Circuits conference in San Francisco, U.S., last month, is 1/30th the size of today's state-of-the-art systems and could be used in a broad range of so-called 'ingestibles' - sensors that monitor health conditions from inside the human body. Like their external, wearable cousins, ingestible sensors..."

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 practical quantum computers is a significant scientific and technological challenge..."

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..."

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..."

Graphene Transistor Amplifier for THz & Light

Graphene Transistor Amplifier for THz & Light - RF Cafe"A new type of graphene amplifier could offer researchers a unique way to access the electromagnetic spectrum. Engineers from Loughborough University have designed an optical transistor out of graphene and a high-temperature superconductor that can amplify terahertz frequencies, and could unlock a whole new field of potential technologies. Terahertz waves (THz) have long fascinated scientists, but unfortunately, their use has been limited by their weak signals. Without an added boost of power, the wavelengths have been too weak for researchers to harness their potential power - until now, that is. The amplifier is deceptively simple, made up of two layers of graphene and the superconductor..."

Spin Capacitor Cuts Heat and Power

Spin Capacitor Cuts Heat and Power - RF CafeAnd now, the cousin of the Flux Capacitor --- the Spin Capacitor! "In what is claimed to be a world first, physicists have developed a so-called spin capacitor that could herald new electronics that require less power and generate less heat. The advance by scientists at Leeds University generates and holds the spin state of electrons for a number of hours compared to previous efforts that held the spin state for a fraction of a second. Their results are published in Science Advances. A conventional capacitor holds energy in the form of electric charge and the development from Leeds does this also whilst storing the spin state of a group of electrons. According to the university, this could lead to a storage device measuring one square inch that could store 100 terabytes of data..."












Not sure how I missed this, but on July 21th,


Custom MMIC Distributed Amplifier Design - RF Cafe QuinStar Technology (Millimeter Wave Solutions) - RF Cafe
Lemos International Technologies Axiom Test Equipment - RF Cafe
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Kirt Blattenberger - RF Cafe Webmaster
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    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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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