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"Communications do not just grow; they are planned." -- Brigadier General Wesley T. Guest

Today in Science History

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

• SIA and SRC Publish $3.4B Plan for Stimulating U.S. Semiconductor R&D

• U.S. DoD Allocates $600M for 5G Experimentation and Testing

• FTC Proposes Rulemaking on "Made in USA" Labeling

• Boingo Launches Wi-Fi 6 at São Paulo Airport

• Europe Telecoms Lobby Group Denounces Bans on Chinese Vendors (gee, wonder where their money comes from?)

• DoJ Files Antitrust Lawsuit Against Google

Reshoring and Onshoring Trend Update

Japan Resists U.S. Calls for Blanket Ban on Chinese Telecoms Tech

• Good News for In-Car Radio Listening

U.S. Space Development Agency Awarded Contracts for 1st Gen Tracking Layer

U.S. Space Development Agency Awarded Contracts for 1st Gen Tracking Layer - RF Cafe"SDA announced October 5 two contract awards for the first generation of the Tracking Layer. These awards represent the next major and highly visible steps toward developing the National Defense Space Architecture's inaugural tranche (called Tranche 0). Once fully operational, the SDA Tracking Layer will consist of a proliferated heterogeneous constellation of Wide Field of View (WFOV) space vehicles (SVs) that provide persistent global coverage and custody capability combined with the Missile Defense Agency (MDA) Hypersonic and Ballistic Tracking Space Sensor (HBTSS) Medium Field of View (MFOV) SVs that provide precision global access capability. This set of contract awards will initiate the development of the first eight low-cost proliferated WFOV SVs..."

After Class: Working with Phase-Shift Oscillators

After Class: Working with Phase-Shift Oscillators, December 1958 Popular Electronics - RFCafeThere is an old adage that goes thusly: "If you want to build an oscillator, design an amplifier. If you want to build an amplifier, design an oscillator." Its basis is the difficulty that can be experienced in obtaining the right combination of feedback phase and amplitude. Of course experience, use of simulators, and careful circuit construction minimize the opportunity for validating that saying. The basic requirement for an oscillator is feedback from the output to the input that is in-phase and great enough in amplitude to maintain, via the amplifier's gain factor, a constant output level. Tuned L-C (inductor-capacitor) tank circuits are often used as simple frequency-determining elements because of their combined resonance characteristics. Phase shift oscillators are a type of oscillator that can be built without inductors...

Teledyne e2v HiRel and Silicon Labs Partner on Isolation

Teledyne e2v HiRel and Silicon Labs Partner on High Reliability Isolation - RF CafeSilicon Labs, a leading provider of silicon, software and solutions, today announced a new high reliability (HiRel) isolation partnership with Teledyne e2v HiRel, a leading provider of high-performance, high-reliability semiconductors to the aerospace and defense market. Under the new agreement, Teledyne will offer a new specialized line of high reliability products based on Silicon Labs' isolated gate driver technology optimized for space, aerospace, military and oil and gas markets. Teledyne e2v HiRel will market custom high reliability solutions based on Silicon Labs' Si827x isolated gate driver family that are optimized for space, aerospace, military, oil and gas and other markets requiring advanced technology and high reliability...

Please Thank Anatech Electronics for Their Long-Time 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. 

Weather Detection Radar

Weather Detection Radar, October 1955 Radio & Television News - RF CafeRCA (Radio Corporation of America) is not really the first company name that comes to mind when thinking about radar, be it weather, aircraft navigation, or nautical navigation. Instead, I think of radios and televisions and even satellites; RCA developed the circa 1958 SCORE series. According to this 1955 article in Radio & Television News magazine, RCA designed and built a a C-band airborne radar system for detecting adverse weather conditions enroute, at a range of up to 150 miles. Operating at around 5.4 GHz at 75 kW peak, the AVQ-10 radar unit was primarily meant for weather avoidance rather than for terrain and aircraft avoidance. The installed weight of 125 pounds was rather amazing considering the use of vacuum tubes and a CRT display (also a vacuum tube), along with leaded passive components and bulky, heavy (relatively) transformers for providing high voltage...

PCBONLINE Blog: How to Create a Custom PCBA

PCBONLINE Blog: How to Create a Custom PCBA - RF CafePCBONLINE, a one-stop custom PCB/PCBA manufacturer for prototypes, small-batch, and massive production, recently published a technical blog to explain how to create a custom PCBA. It answers what is a PCBA, how to create a custom PCBA, the techniques used for manufacturing the PCBA, etc. When a PCB is mounted with electronic components, it becomes a PCBA (printed circuit board assembly), which is a semi-finished electronic product that achieves the vital function of an electronic device. PCBAs are used in almost all electronics industries. PCBAs manufactured by PCBONLINE include the high frequency PCBA, multilayer PCBA, rigid-flex PCBA, aluminum PCBA, etc. 1 to 100 layer PCBAs can be delivered in 3 days...

Printing High-Speed Low-Power Organic Transistors

Printing High-Speed Low-Power Organic Transistors - RF Cafe"For around 10 years, smartphones and computer screens have been based on a display technology composed of so-called thin film transistors. These are inorganic transistors that require very little power, and they have proven themselves capable, given their widespread adoption. But they have limits that researchers have been busy trying to overcome. 'We explore new ways to improve upon thin film transistors, such as new designs or new methods of manufacture,' said Gyo Kitahara, a Ph.D. student from the Department of Applied Physics. 'Organic thin film transistors, for example, have a bright future in LCD screen devices. Compared to the inorganic kind currently used..."

RCA Victor Advertisement from The Saturday Evening Post c1948

RCA Victor Advertisement from the November 6, 1948, The Saturday Evening Post - RF CafeHere is an advertisement by RCA Victor (Radio Corporation of America) from the November 6, 1948, edition of the The Saturday Evening Post. As was common in the day, the company specifically addresses Americans in an American magazine. Rarely anymore does a major American company use the word "America" or "American" in promotional material because of globalism and the fear of being too committed to the well-being of its native country. The same is true of most western countries' corporations, where their country names can be substituted for "America" in this piece. Up through about the 1980s it was commonplace to specifically address countrymen. Once manufacturers ramped up offshoring efforts the practice began disappearing. Offshoring is distinctly different from importing another...

ConductRF Low Smoke / Zero Halogen Cable Solutions

ConductRF Low Smoke/Zero Halogen Cable Solutions - RF CafeConductRF is pleased to offer Low Smoke / Zero Halogen Jacketed RF Cables for various applications Indoor and Outdoor for Naval Ship-Board applications. We have two ranges of solutions aimed at differing RF requirements with our SBA series aimed at Higher Frequency 18 GHz needs. These are 100% factory tested to exacting VSWR and Loss standards because, We know, Results Count! ConductRF manufactures a range RF Cables in support of Ship Board applications, where Low Smoke, Zero Halogen requirements are mandated. These cable have Low Smoke Polyolefin Jackets that are suitable for Ship Board Environments. The Cable solutions are commonly available in 3 sizes with cable OD of 0.240", 0.405" and 0.590"...

Thanks to PCB Directory for Continued Support!

PCB  Directory - RF CafePCB Directory is the largest directory of Printed Circuit Board (PCB) Manufacturers, Assembly houses, and Design Services on the Internet. We have listed the leading printed circuit board manufacturers around the world and made them searchable by their capabilities - Number of laminates used, Board thicknesses supported, Number of layers supported, Types of substrates (FR-4, Rogers, flexible, rigid), Geographical location (U.S., China), kinds of services (manufacturing, fabrication, assembly, prototype), and more. Fast turn-around on quotations for PCB fabrication and assembly.

For the Record: Scatter Communications

For the Record: Scatter Communications, October 1955 Radio & Television News - RF CafeIt seems Amateur radio operators in every country have perpetually been in a battle against government bureaucrats. Early on, Hams were allocated small segments of available "usable" spectrum and a fairly wide swath of the less desirable spectrum. That was especially true of the microwave bands when there was not a lot of components and equipment available that could operate at the higher frequencies. Those familiar with history are familiar with the situation where Amateurs developed a lot of the technology for operating in the upper MHz and into the GHz realm, and then the government snatched it from them for commercial and military use. Hams pretty much pioneered atmospheric scatter as a means for long distance (DX), over-the-horizon communications using those upper frequencies. This editorial from a 1955 issue of Radio & Television News magazine reports on a relatively newer...

Quietest Semiconductor Quantum Bits on Record

Quietest Semiconductor Quantum Bits on Record - RF Cafe"Researchers at UNSW Sydney have demonstrated the lowest noise level on record for a semiconductor quantum bit, or qubit. The research was published in Advanced Materials. For quantum computers to perform useful calculations, quantum information must be close to 100 percent accurate. Charge noise - caused by imperfections in the material environment that hosts qubits - interferes with quantum information encoded on qubits, impacting the accuracy of the information. "The level of charge noise in semiconductor qubits has been a critical obstacle to achieving the accuracy levels we need for large-scale error-corrected quantum computers," says lead author Ludwik Kranz, a Ph.D. student at UNSW's Centre for Quantum Computation and Communication Technology (CQC2T)..."

Please Thank RF Superstore for Their Continued Support

RF Superstore coaxial cable, connectors, adapters - RF CafeRF Superstore launched in 2017, marking the return of Murray Pasternack, founder of Pasternack Enterprises, to the RF and microwave Industry. Pasternack fundamentally changed the way RF components were sold. Partner Jason Wright manages day-to-day operations, while working closely with Mr. Pasternack to develop RF Superstore into a world class RF and microwave component supplier. RF coaxial connectors & adapters, coaxial cable & cable assemblies, surge protectors, attenuators. Items added daily. Free shipping on orders over $25. We're leading the way again!

Electronic Menu Quiz

Electronic Menu Quiz, August 1963 Popular Electronics - RF CafeThis Electronic Menu Quiz appeared in the August 1963 edition of Popular Electronics magazine. Robert Balin created many such quizzes for Popular Electronics over the years. It challenges you to match the common food-related term for a device with its picture. If you've been around electronics labs and/or read electronics hobbyist magazines for a while, chances are you have run across most of the terms. I suggest you click on the image to get a full-size view of the drawings to be able to see all the detail. A couple of the names I have to admit not being familiar, so they seem rather 'corny'... get it?

Military Mast Problems and Solutions

Military Mast Problems and Solutions - RF CafeEach month the ARRL's flagship magazine, QST, makes an article available for free to non-members. November's selection is entitled "Military Mast Problems and Solutions." Bob Dixon, W8ERD, begins: "Many of us use military surplus masts and tripods to hold up antennas, especially in portable situations. They work very well, but these masts have potential stability problems, because the adjacent mast sections and tripod are held together by their weight and by friction alone. If the mast is tilted by the wind or pulled by a wire, the mast joints and tripod can separate, and the entire structure can fall down catastrophically. Also, if you have a rotatable antenna on the mast, the mast sections can slip and rotate the antenna, or make it difficult to turn. These problems can be fixed by pinning all the mast sections and the tripod together..."

Skyworks Circulator for Radar Systems and Wireless Apps

Skyworks Surface Mount Circulator for Radar Systems and Wireless Applications - RF CafeSkyworks is pleased to introduce the SKYFR-001982, a small form factor surface mount circulator for L-Band radar systems and wireless applications in the 1200-1400 MHz operating range. This device offers high power level handling with minimal thermal rise, providing a flow path for the RF signal as well as protection for sensitive components from excess signal reflection. Packaged in a compact SMT housing, the SKYFR-001982 can be easily incorporated onto PCB boards with automated pick and place manufacturing. The SKYFR-001982 is the latest in Skyworks' broad portfolio of Circulator and Isolator products for radars for both military and commercial applications...

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.

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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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