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"The slide rule helped to design the very machines that would render it obsolete." - Robert Ragen

Today in Science History

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

• Sweden Completes 5G Spectrum Auction in One Day

• Supreme Court Hears Media Ownership Arguments

• FCC Issues Multiple Citations for Unlawful Marketing of RF Devices

• Swedish 5G Auction Completes Despite Huawei Opposition

• Rocket Lab Launches Communications Satellite for OHB

• Statement on Satellite Constellations by German Astronomical Society

• European Operators form OpenRAN Cabal

• FCC 1st Phase C-Band Auction Tops $80B (yet they need $35 for a Ham license)

• Wi-Fi Alliance Launches Certification for 6E Devices

Radio Lands the Plane

Radio Lands the Plane, August 1938 Radio News - RF CafeConsidering that only three-and-a-half decades had passed since the brothers Wright first flew their eponymous "Flyer" off the sands of Kitty Hawk, North Carolina, it is pretty impressive to think that by 1938 the majority of commercial air transport planes were under the able control of electromechanical apparatus(es?). Rudder, elevator, aileron, and throttle, driven by electrical servomechanisms rather than human hands and feet, responded to the signals to analog computers fed data from onboard barometer, accelerometer, level, and compass sensors, and from ground-based radio directional beams. That was for mostly straight and level flight from one fixed waypoint to another. An ability to program vectored flight paths came later. This "Radio Lands the Plane" article discusses progress being made in the realm of completely automated landings. As can be seen, the framework for modern instrument landings systems was being laid...

Withwave Intros 2.92 mm to SMPM Adapter Series (DC to 40 GHz)

Withwave Intros 2.92 mm to SMPM Adapter Series (DC to 40 GHz) - RF CafeWithwave's precision 2.92 mm to SMPM mm Adapter Series are designed based on precision microwave interconnection technologies. These adapter series are manufactured to precise microwave specifications and constructed with male and female gender on both side. The precision microwave connector interfaces ensure an excellent microwave performance up to 40 GHz. VSWR is 1.2:1 (max), M-M, M-F, F-F, F-M interface combinations, passivated stainless steel body. Useful in laboratory and productions test setups, prototyping, and production interconnections...

Electronic Devices Printed Using Graphene Inkjet Process

Next-Gen Electronic Devices Printed Using Graphene-Based Inkjet Process - Airplanes and Rockets"A team at the University of Nottingham used graphene, a material with high electrical conductivity, in an ink-jet printing process to build up mesh together electronic structures that can perform functions such as converting light into electricity. Related: New 2D Materials Show Promise for Future Electronic Devices The approach demonstrates a new way to use the material for 3D printing processes as well as provides insight into the design of next-generation electronic devices, researchers said. Led by Professor Mark Fromhold, head of the university’s School of Physics and Astronomy, the team used quantum mechanical modeling to identify how electronics move through 2D-material layers..."

Microwaves Part II: Generation of Microwaves

Microwaves Part II: Generation of Microwaves, August 1945, Radio-Craft - RF CafeThe Barkhausen-Kurz (B-K) oscillator is credited as being the first high power microwave generator that exploited the electron transit time effect. It was developed in 1920 by German physicists Heinrich Georg Barkhausen and Karl Kurz. As this article's author points out, the vacuum tube and supporting circuits were difficult to produce and were not very well understood theoretically. Shortly thereafter, the magnetron and klystron tubes came along and dominated the high power microwave generation realm. Included in Part II of "Microwave - Generation of Microwaves" is a good, brief explanation of the operation of both B-K and magnetron circuits...

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...

Please Visit Anatech in Appreciation of Their Support!

Anatech Electronics logo - RF CafeAnatech Electronics (AEI) manufactures and supplies RF and microwave filters for military and commercial communication systems, providing standard LP, HP, BP, BS, notch, diplexer, and custom RF filters, and RF products. Standard RF filter and cable assembly products are published in our website database for ease of procurement. Custom RF filters designs are used when a standard cannot be found, or the requirements dictate a custom approach for your military and commercial communications needs. Sam Benzacar's monthly newsletters address contemporary wireless subjects. Please visit Anatech today to see how they can help your project succeed. 

Microwaves Part I - Introductory and General

Microwaves Part I - Introductory and General, July 1945 Radio & Television News - RF CafeIn 1945 when this series was published in Radio-Craft magazine, microwaves were pretty much the realm of corporate and university research laboratories and - often coincidentally - secret Department of War projects. Radar was the primary application, although some work was being done on high bandwidth communications by the aforementioned entities, in some cases following in the footsteps of amateur radio operator's discoveries about how the higher frequencies were affected by the ionized layers of the Earth's atmosphere. Immediately following the end of World War II, the government began declassifying a lot of information learned about microwave, and magazines were fast to pick up on it. In fact, there were instances where editors saw fit to write columns asserting their right to do so when criticisms were heaped upon them by readers accusing them...

Axiom Blog: Welcome the New Year by Upgrading Your Test Gear

Axiom Blog: Welcome the New Year by Upgrading Your Test Gear - RF CafeAxiom Test Equipment, an electronic test equipment rental and sales company has published a new blog post entitled "Welcome the New Year by Upgrading Test Gear," that tells you how to determine when it's time to upgrade your test equipment. Learn about the different opportunities and think about what requirements you have coming up in order to recognize the right time and equipment to upgrade. Test instrument upgrades provide opportunities for improvement: to make up for what is missing in an instrument or test setup, be it measurement speed, accuracy, bandwidth, sensitivity, resolution, even more measurement channels. Other times, equipment becomes obsolete and prompts an upgrade to newer equipment that is still supported by the manufacturer or gives you increased performance...

BAE Systems Developing Weapon Data Link Radio for Hypersonic Weapons - RF Cafe"U.S. military researchers needed a weapon data link radio to help steer hypersonic weapons to their targets. Officials of the U.S. Defense Advanced Research Projects Agency (DARPA) in Arlington, Va., announced a $4 million contract to BAE Systems last month to develop two weapon data link prototypes for test and integration of the future hypersonic Tactical Boost Glide (TBG) vehicle. The TBG program is a joint DARPA and U.S. Air Force effort to develop technologies for future air-launched, tactical-range hypersonic boost glide systems. Boost glide uses a rocket to accelerate a weapon payload to high speeds, after which the payload then separates from the rocket and glides unpowered to its destination..."

It's a Man's Job Behind That Microphone

It's a Man's Job Behind That Microphone, April 1932 Radio News - RF CafeThe old-time radio broadcasts available on the Internet are obviously recorded version of shows made long ago. However, back in the day those shows were originally performed live in front of microphones and recorded in a broadcast studio. With a cast of two or three or even more, the actors would voice their lines with as much talent and effort as those performing for movies. The crew usually included a group of people responsible for creating background sound effects like horses running, car horns tooting, airplanes buzzing by, and dogs barking. All was done real-time with split-second timing required to pull it off and sound convincing. Radio audiences were unaware of all the work required as they sat intently listening to the Adventures of the Lone Ranger and The Shadow. Behind the scenes were dozens of engineers and technicians tending local radio broadcasting equipment and all-important telephone landlines used for synchronizing stations across the country...

Triad RF Systems Ends 2020 with Record Results

Triad RF Systems Ends 2020 with Record Results - RF CafeTriad is pleased to announce that it continued to outperform revenue projections in the second half of 2020. The year's record−high revenue and orders were driven by the company's rapidly growing reputation as a premier supplier of feature-rich, ultra−efficient radios, RF/microwave bi−directional amplifiers, custom multi−functional amplifier systems, CubeSat frequency converters and amplifiers and wideband amplification for EW and counter UAS systems. Triad delivered some of the highest data−rates and longest−range ISR wireless links available for Unmanned Land, Sea, and Air Systems this year. Triad achieved several financial and operational goals in 2020 and positioned itself for future growth with the introduction of its new line of amplified radios, investment in operations, and the addition of key team members...

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.

Electric Space Ships

Electric Space Ships, January 1951 Radio-Electronics - RF CafeWe've all heard of a Van de Graaff (Robert J.) electrostatic generator, but have you heard of a Wommelsdorf (Heinrich) generator (aka influence machine)? I hadn't prior to reading this article entitled "Electric Space Ships" from a 1951 issue of Radio-Electronics magazine. It took careful reading to get my head around the propulsion scheme detailed by Professor Hermann. At first I thought he was describing electric propulsion, but in fact his machine uses electrical energy generated from the sun to accelerate some form of liquid propellant via static electric charges. Therefore, this is not a system capable of indefinitely sustaining itself and its payload (which includes human inhabitants). In fact, the good professor proposes a geostationary refueling station above the Earth...

Bound-Charge Engineering: Developing Nanowire Transistors

Bound-Charge Engineering: A New Strategy to Develop Nanowire Transistors - RF Cafe"In recent years, physicists and electronic engineers have been trying to identify materials that could be used to fabricate new types of electronic devices. 1-D and 2-D materials have been found to have particularly advantageous characteristics, particularly for the development of new generations of nanoelectronics (electronic components at the nano scale). Such 1-D and 2-D materials, such as graphene, monolayer molybdenum disulfide, silicon nanowires and silicon nanosheets, could also play a crucial role within the semiconductor industry, as they could help to develop increasingly small transistors. Despite their well-documented advantages, emerging low-dimensional materials can have a relatively small amount of so-called free charges compared to 3-D materials. In the context of electronic components, a free charge is an electron or hole..."

Lead RF Design Engineer Needed by Copper Mountain Technologies

Lead RF Design Engineer Needed by Copper Mountain Technologies - RF CafeCopper Mountain Technologies (CMT) is seeking a Lead RF Design Engineer to develop new VNAs for customers all over the world. Our USB VNAs are next generation analyzers designed to meet the needs of 21st Century engineers. Our VNAs include an RF measurement module and a processing module, a software application which runs on a Windows or Linux PC, connecting to the measurement hardware via USB interface. The Lead RF Design Engineer will lead a team of engineers developing new USB VNAs, meeting new customer requirements, and evolving current product line. This individual will work closely with product management, manufacturing and other engineering teams to ensure delivery of quality solutions to customers. Take this opportunity to join a great company. Preferred location for this position...

Censorship vs. Radio Progress

Censorship vs. Radio Progress, December 1942 Radio-Craft - RF CafeHaving spent a lot of my career working for defense electronics companies in classified programs, I am somewhat torn between sympathizing with Hugo Gernsback from his perspective as editor of Radio-Craft and what I know is a valid reason for guarding certain technological information for the sake of military advantage. It is often the case that people who have had no exposure to the 'black' side of industry cannot appreciate the need for it. Their argument postulates that suppressing knowledge does more harm than good because an opportunity for more people to gain from breakthroughs will result in more rapid advancement in technology. While that is true, the downside is that the enemy rarely feels obliged to reciprocate in the same manner, and will exploit your generosity...

Skyworks & ASUS Launch World's 1st Ultra−Fast Wi−Fi 6E Router

Skyworks Partners with ASUS to Launch World's First Ultra-Fast Wi-Fi 6E Extended Band Router - RF CafeSkyworks Solutions, an innovator of high-performance analog semiconductors connecting people, places and things, today announced that its high-performance Wi-Fi 6E front-end modules are featured on the world's first ultra-fast Wi-Fi 6E gaming router from ASUS. Utilizing the FCC's newly allocated 6~7 GHz extended band to double the capacity of traditional Wi-Fi, the Wi-Fi 6E standard enables faster connectivity and supports an increased number of connected users meeting the unprecedented demand for increased video conferencing, online gaming, streaming TV, AR/VR, home security cameras and online exercise apps. An established leader in the networking market, ASUS is the first to deliver the increased and wider bandwidth 160 MHz channels of Wi-Fi 6E with its ROG Rapture GT-AXE11000 gaming router...

National Union Radio Corporation Tubes

National Union Radio Corporation, March 1944 Radio-Craft - RF Cafe"Necessity is the mother of invention," is an oft-heard maxim that is validated continually. Such was the case, as pointed out here in this National Union Radio Corporation ad which appeared in a 1944 issue of Radio-Craft magazine. The development of many new metal alloys was required in order to obtain the kind of performance and reliability needed in ever-evolving electronics products. Already available metals for filaments, coils, grid wires, getters, electron guns and many other constituents of vacuum tubes that are subject to high temperatures (many hundreds of degrees) and mechanical conditions (unequal coefficients of expansion, for example, which can cause stress fractures), were not sufficient for the task. Metallurgists had their work cut out for them...

Windfreak Technologies withwave microwave devices - RF Cafe
LadyBug Technologies LB479A RF Power Sensor - RF Cafe Axiom Test Equipment - RF Cafe
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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