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"In astronomy, the only numbers are one, two, and infinity. So if you get two, there are probably lots more." - Philip Morrison, SciAm

Today in Science History

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

• FCC Establishes Innovation Zones for Experimental Wireless Licenses

16 GHz Indium Aluminum Nitride Barrier Transistors on Silicon

• Volvo Group Passes 1,000,000 Connected Customer Assets

How Sustainable Is High-Tech?

• Alexei Leonov, World's 1st Space Walker, Dies

• Cooperative Agrees to Pay FCC Fine for Violating Antenna Inspection Rules

• U.S. Semiconductor Industry Veterans Keep Wary Eyes on China

• Nanomaterials Scientists Pave Way for Ultra-Tiny Electronics

Does U.S. Need Its Own Nokia, Ericsson, Huawei?

TotalTemp Technologies: Thermal Platforms for −100°C to +200°C

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.

Engineering & Science Crossword Puzzle for October 20

Engineering & Science Crossword Puzzle October 20, 2019 - RF CafeFor two decades, I have been creating custom engineering- and science-themed crossword puzzles for the brain-exercising benefit and pleasure of RF Cafe visitors who are fellow cruciverbalists. This October 20, 2019, puzzle uses a database of thousands of words which I have built up over the years and contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc. 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 ...

Reversible Television

Reversible Television, January 1948, Radio-Craft - RF CafeThat Hugo Gernsback was a prolific writer, inventor, visionary, designer, and builder is unquestionable given the huge number examples of each that can be easily found on the Internet and in libraries. Gernsback was never bashful about giving himself credit for technology predictions when thy come to fruition and for the coining of new terms. In this "Reversible Television" editorial column that appeared in a 1948 issue of his Radio-Craft magazine, Gernsback claims to have been the first to use the word "television" in a technical article - but not necessarily having invented the term. He did have an idea for a "Telephot," a portmanteau of "telephone" and "photograph." The device would take the form of phone with a built-in video display to allow parties to view each other whilst ...

Jean-Marie Polard's Earth Ground Antennas

Earth Ground Antenna (Jean-Marie Polard) - RF CafeA few days ago I posted an article from a  1935 article in Short Wave Craft magazine entitled, "Put Your Aerial Underground." Upon seeing it, RF Cafe visitor Jean-Marie Polard (F5VLB), located in France, sent me a note about his very impressive Facebook page that contains a lot of information on Earth Probes Used As Antennas. Evidently there is a large contingent of radio amateurs, at least in Europe, still experimenting with and successfully using the method. As with many areas of wireless communications, Ham operators worldwide are continuing to push back the technology frontiers ...

Electronics-Themed October 1944 & May 1945 Radio-Craft

Electronics-Themed October 1944 & May 1945 Radio-Craft - RF CafeIt's Friday again already (...finally). In that these comics from Radio-Craft magazine have an electronics theme, you can claim looking at them is work-related. The themes of the comics reflect common scenarios of the 1944-1945 era in which they were published, but with not much modification can be applied to today's environment. People will always expect more features from products, will be critical of everything presented to them, and will want to haggle for the best deal from the used camel salesman. You might consider using one of them for your next conference or project status presentation. Enjoy ...

Many Thanks to Reactel for Their Long-Time Support!

Reactel Filters - RF Cafe

Reactel has become one of the industry leaders in the design and manufacture of RF and microwave filters, diplexers, and sub-assemblies. They offer the generally known tubular, LC, cavity, and waveguide designs, as well as state of the art high performance suspended substrate models. Through a continuous process of research and development, they have established a full line of filters of filters of all types - lowpass, highpass, bandpass, bandstop, diplexer, and more. Established in 1979. Please contact Reactel today to see how they might help your project.

Ultra-Clean Fabrication Platform for 2D Transistors

Ultra-Clean Fabrication Platform for 2D Transistors - RF Cafe"Recently discovered two-dimensional (2D) materials with superlative properties have the potential to advance semiconductors but creating 2D devices with both good electrical contacts and stable performance has proved challenging. A nearly ideal transistor made from a two-dimensional material stack - with only a two-atom-thick semiconducting layer - was fabricated using a completely clean and damage-free fabrication process. The method shows vastly improved performance compared to 2D semiconductors fabricated with a conventional process and could provide a scalable platform for creating ultra-clean devices in the future. The two-step, ultra-clean ..."

Custom MMIC: Off-the-Shelf and Custom MMICs

Custom MMIC- RF CafeCustom MMIC is a fabless RF and microwave MMIC designer entrusted by government and defense industry OEMs. Custom and off-the-shelf products include switches, phase shifters, attenuators, mixers and multipliers, and low noise, low phase noise, and distributed amplifiers. From next-generation long range military radar systems, to advanced aerospace and space-qualified satellite communications, microwave signal chains are being pushed to new limits - and no one understands this more than Custom MMIC. Please contact Custom MMIC today to see how they use their modern engineering, testing and packaging facility to help your project. 

Exploring Electronics with Simple Projects

Exploring Electronics with Simple Projects, August 1958 Popular Electronics - RF CafeThis photo from an article entitled, "Exploring Electronics with Simple Projects," which appeared in a 1958 issue of Popular Electronics magazine, made me think of "The Radio Boys" series of books written in the 1920s. A shorter series entitled "The Radio Girls" appeared as well. Both titles told tales of a group of youngsters who were caught up in the "wireless" craze of the era. They built their first receivers entirely from homemade parts, including winding the tuning coil and fashioning a moveable tap on the coil. Motivated by more knowledgeable adults - of which there were few in the day - the kids progressed on to single-tube sets and then, after earning their licenses, built and operated transmitters. Today such do-it-yourselfers are called "Makers," and there is an entire industry and culture ...

Exodus Advanced Communications Intros Wideband 1 kW Power Amplifier

Exodus Advanced Communications Intros Wideband 1 kW Power Amplifier - RF CafeExodus Advanced Communications is pleased to introduce our high power 10 kHz to 100 MHz 1000-watt, class A/AB linear LDMOS, rack mountable amplifier. Exodus AMP2080E-1 produces 1000 W minimum, >1100 W nominal power, P1dB 700 W typical. The minimum power gain is >60dB with excellent gain flatness. Included are amplifier monitoring parameters for Forward/Reflected power, VSWR as well as voltage, current & temperature sensing for optimum reliability & ruggedness for all applications. Nominal weight is 120 lbs., and dimensions of 19"W x 30"L x 17.5"H ...

RF Cafe Quiz #49: High-Frequency Integrated Circuits

RF Cafe Quiz #49: High-Frequency Integrated Circuits - RF CafeAll RF Cafe quizzes would make perfect fodder in employment interviews for technicians or engineers - particularly those who are fresh out of school or are relatively new to the work world. Come to think of it, they would make equally excellent study material for the same persons who are going to be interviewed for a job. This quiz is based on the information presented in High-Frequency Integrated Circuits, by Rosin Voinigescu.

Anatech Electronics October 2019 Newsletter: Plasma Antennas

Anatech Electronics October 2019 Newsletter: Plasma Antennas - RF CafeSam Benzacar of Anatech Electronics, an RF and microwave filter company, has published his October newsletter that features his short op−ed entitled "Coming: Plasma Antennas." Plasma antennas have been appearing in the news items I collect, and Sam does a pretty good job summarizing their operation and benefits. One feature I do not recall seeing elsewhere is that in the "off" state, the plasma antenna presents a very small radar cross section (RCS), which is strategically advantageous for stealth aircraft (and surface ships). In other news, Sam includes other news related to our RF industry ...

Thanks Once Again to everythingRF for Long-Time Support!

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 227,460 products from more than 1210 companies across 285 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.

Terahertz Data Links Without Direct Line of Sight

Terahertz Data Links Without Direct Line of Sight - RF Cafe"Today's cellular networks and Wi-Fi systems rely on microwave radiation to carry data but the demand for more bandwidth is quickly becoming more than microwaves can handle. That has researchers thinking about transmitting data on higher frequency terahertz waves, which have as much as 100 times the data-carrying capacity of microwaves. But terahertz communication technology is in its infancy - there is much basic research to be done and plenty of challenges to overcome. It's been assumed that terahertz links would require a direct line of sight between transmitter and receiver ..."

Windfreak Technologies PCB Directory (Design)
Axiom Test Equipment - 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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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