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"The trouble with the world is that the stupid are cocksure and the intelligent full of doubt." - Bertrand Russell

Today in Science History

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

• Will the Tech Workplace Ever Be the Same Again?

Hong Kong's Status as Semiconductor Hub Under Threat (thanks to China)

• Cambium Embraces 60 GHz, Wi-Fi 6

Breakthrough in Spintronics Could Boost High Speed Data

Rural Cloud Initiative Brings the "Edge" to Rural America

Radio Broadcasting Bouncing Back

• UK: Huawei Must Meet Conditions for Use in 5G Network

South Korea Nears 7M 5G Subscribers

GaN and SiC Semiconductor Markets to Surpass $1B in 2021

Empower RF Systems' Technologically Advanced 90 kW SSPA

Empower RF Systems' Technologically Advanced 90 kW Power Amplifier - RF CafeEmpower RF Systems' Model 2225 is a long duty cycle pulsed amplifier operating from 5.2 to 5.9 GHz and represents our new technologically advanced liquid cooled and scalable architecture. This breakthrough solid state GaN design replaces tube technology to bring new capabilities to EW, Radar, Directed Energy and Satcom applications where tens and hundreds of kilowatts of CW and Pulse power are required. This new modern architecture offers scalability for affordable upgrade paths to future power needs by adding hardware to an existing system. Additional racks can be combined and for racks not fully populated, 2U amplifier drawers can be added without the need for tuning...

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 267,269 products from more than 1397 companies across 314 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.

For the Record: The Flat Age

For the Record: The Flat Age, July 1955 Radio & Television News - RF CafeRadio & Television News editor Oliver Reed wrote in this 1955 issue about the "flattening" of electronics - including both individual components and overall assembled products. He described a large screen, wall-mountable television system with built-in flat stereo electrostatic speakers. "The so-called 'picture on the wall' television screen has also received widespread publicity although such a screen is not yet commercially available. In this system, a flat screen is connected to the TV receiver by means of a cable, and the picture is formed on the screen electronically." That is a lot like a large flat LCD or LED monitor being fed by an HDMI cable from a computer. Mr. Reed also writes of a magnetic tape video playback system akin to what eventually became the VHS / VCR. Evidently the concept of an optical-based storage medium like the DVD and Blu-ray disk was too far out of the realm of possibility...

Guidelines for Choosing RF and Microwave Products: Coaxial Cables

Guidelines for Choosing RF and Microwave Products - RF CafeAnatech Electronics has a handy app note describing how to select and specify coaxial cables and assemblies. "Coaxial cables are too often taken for granted and RF and microwave systems. As a result, they are often treated like a spool of bell wire, twisted, band, crimped, stepped on, and subject to assorted other abuses. However, the more you know about coaxial cable the more likely you are to treat it with respect, as its integrity, lifetime, and overall performance are at stake. To get a better understanding of coaxial cables in general, Anatech Electronics has prepared a series of guides that provide information about RF and microwave coaxial cables ranging from the basics contained in this application note to more detailed information about characteristics, applications, specific cable types, and other topics..."

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...

Many Thanks to Lemos International Technologies for Continued Support!

Lemos International - RF CafeLemos International Technologies is both a designer and manufacturer of wireless products and a distributor of products from other world-class manufacturers. A modular approach to wireless connectivity helps eliminate much of the technical design and testing and also simplifies or eliminates the need for expensive conformance testing and certification. Ready-to-use Bluetooth, GPS, Wi-Fi, licensed and unlicensed band products are available. Custom design services can help you achieve success with your project's unique needs.

Editorial re FCC Potentially Shutting Down Amateur Radio During WWII

Editorial on FCC Potentially Shutting Down Amateur Radio During WWII, November 1940 QST - RF Cafe"Do you think that F.C.C. would be engaged in the present terrific expense and effort of getting our fingerprints and citizenship histories if there were intention of shutting us down shortly?" That statement was printed by the QST magazine editor in the issue that preceded the December 7, 1941, attack on Pearl Harbor by thirteen months. A few things about it are troubling. First, the FCC was collecting fingerprints of licensed amateur radio operators. Second, the FCC was assimilating information about licensed amateur radio operators' citizenship histories. Third, a combination of short-sightedness and apparent naiveté concerning the FCC's willingness to shut down amateur radio operations once America had been inevitably drawn into World War II...

Withwave Multicoax Cable Assemblies

Withwave Multichannel Coaxial Cable AssembliesWithwave's High Speed & High-density Multicoax Cable Assemblies (WMX Series) provides a wide range of multiple coax connectors and flexible cable assemblies with a choice of 20, 40, 50, 67 GHz configurations based on precision array design and superior high frequency cabling solutions. WMX Series cables are excellent signal integrity solutions for bench-top testing and automated test equipment to meet increasing demands of semiconductor test equipment and optical testing industries. These products consist of high performance flexible assemblies which can be bundled in housings (8 and 16 channels) and the interface to board is compression type which provides lower total cost of testing by avoiding costly soldering components...

KR Electronics: RF & Microwave Filters

KR ElectronicsKR Electronics designs and manufactures high quality filters for both the commercial and military markets. KR Electronics' line of filters includes lowpass, highpass, bandpass, bandstop and individually synthesized filters for special applications - both commercial and military. State of the art computer synthesis, analysis and test methods are used to meet the most challenging specifications. All common connector types and package form factors are available. Please visit their website today to see how they might be of assistance. Products are designed and manufactured in the USA.

Hi-Fi Anagram (crossword, actually)

Hi-Fi Anagram, July 1958 Radio & Television News - RF CafeFrom about the middle of the 1950s through the 1990s, stereo systems were a pretty big deal amongst music listeners. A lot of the interest was driven by rapid improvements in technology in sound recording and reproduction equipment. An economical boom in the post Korean War years combined with a process developed by Emory Cook to cut dual channels of stereophonic sound onto vinyl records enabled a fad fueled by teenagers of building the best home sound systems possible with available funds. Audiophiliac adults, of course, were also prime motivators of the technology since they had deeper pockets and could afford higher-end equipment and larger collections of records. Magnetic tape was also a bit part of the craze, but the big money was in vinyl. If you peruse the vintage electronics magazines like this Radio & TV News, Popular Electronics, Electronics World, et al, you will notice the pages were filled with technical articles on and advertisements for stereo music reproduction gear...

Measuring Tiny Quasiparticle a Major Step for Semiconductor Technology

Measuring Tiny Quasiparticle a Major Step for Semiconductor Technology - RF Cafe"A team of researchers led by Sufei Shi, an assistant professor of chemical and biological engineering at Rensselaer Polytechnic Institute, has uncovered new information about the mass of individual components that make up a promising quasiparticle, known as an exciton, that could play a critical role in future applications for quantum computing, improved memory storage, and more efficient energy conversion. Published today in Nature Communications, the team's work brings researchers one step closer to advancing the development of semiconductor devices by deepening their understanding of an atomically thin class of materials known as transitional metal dichalcogenides (TMDCs), which have been eyed for their electronic and optical properties..."

Make Sure EVs and HEVs Are Good for Every Mile

Make Sure EVs and HEVs Are Good for Every Mile - RF CafeAxiom Test Equipment, an electronic test equipment rental and sales company has published a new blog post that examines electric vehicles (EVs) and hybrid electric vehicle (HEVs) power systems to understand what should be tested and how to perform those measurements in order to achieve peak vehicle operation. Manufacturers of EVs and HEVs are making it simpler and more convenient to maintain adequate electric charge levels to keep their vehicles running for longer distances on electric power, enticing more drivers to try these environmentally friendly vehicles. Of course, testing the electrical motors, systems, and their components is an important part of ensuring that every EV and HEV has the longest running times and operating lifetimes possible, and that involves understanding what needs to be tested and how...

Many Thanks to Res-Net Microwave for Continuing Support!

Res-Net Microwave Components - RF CafeRes-Net Microwave has a complete line of precision RF & microwave components including attenuators, terminations, resistors, and diode detectors for commercial, military, and space applications. Products range from the small flange type to large 2,000 watt connectorized power attenuators and/or terminations at frequencies up to 26.5 GHz. In-house photo etch and laser trim capability. The company is a leader in development and production of the films required for these type of RF/microwave components. Please check out Res-Net Microwave's website to see how they can help with your current project.

Your Antenna - Key to World-Wide DX

Your Antenna - Key to World-Wide DX, November 1959 Popular Electronics - RF CafeHere is a quick course on how to point antennas for over-the-horizon (DX) reception, and, if you also happen to have a license to transmit, for broadcasting. It covers how to determine the shortest straight-line path by stretching a string around a globe (remember those spherical maps that used to be a mainstay of every household and schoolroom?) and using a protractor (a what?) to get the angle. Radio signals unless refracted or reflected take a great circle route from point A to point B. Long distance airline flights take the same routes, which explains why flights from London to Los Angeles fly over Greenland enroute. Author Edward Noll uses a simple 1/2-wave dipole antenna radiation pattern as an example of how directivity is affected by frequency (relative to the fundamental)...

ConductRF TSA90 / TSX90 Phase & Temperature Stable Cables

ConductRF TSA90 / TSX90 Phase & Temperature Stable Coaxial Cables - RF CafeConductRF's DC to 18 GHz TSA90 with Type-N and SMA options as well as our TSX90 with extended frequency 27 GHz SMA solutions, are built with a special dielectric material that eliminates the "Teflon Knee" in phase change over temperature, which is a common cause for performance variance in RF cables used in different environments. These cables are over 30% smaller than traditional lab test cables, so offer users increased flexibility and density particularly where multiple cables are used together such as semiconductor testing. With connector options up to 27 GHz, these cables can offer users solutions for both RF test and also internal system cables. The triple shielding feature...

Triad RF Systems withwave microwave devices - RF Cafe
Exodus Advanced Communications - RF Cafe Berkeley Nucleonics Academy - RF Cafe
About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,
    BSEE - KB3UON

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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