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"Thinking like a customer is not too bad a way to design products." - Bob Pease, National Semi, Pease Porridge

Today in Science History

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

• What We Know About 5G Smartphones (so far)

Supercomputer Top 500 Shows China, U.S. Gains

• Fujitsu Moving RF Signal Processing from Analog to Digital

• UK Team Aims for Commercial Quantum-Based Gravity Sensor

• What Happens When Your Data Gets Redirected to China

• After Conquering World, Smartphone Faces Uncertain Future

Detecting Bombs and Weapons with WiFi

Semiconductor Degradation Mechanism Identified

Digital Spending Shatters Records

Many Thanks to MECA Electronics for Their Long-Time Support!

MECA ElectronicsSince 1961, MECA Electronics has designed and manufactured an extensive line of RF & microwave components for in-building, satellite, radar, radio, telemetry, mobile radio, aviation & ATC. Attenuators, directional & hybrid couplers, isolators & circulators, power dividers & combiners, loads, DC blocks, bias-Ts and adapters & cables. MECA has long been the 'backbone' of high performance wired and air-interfaced networks such as in-building applications, satellite communications, radar, radio communications, telemetry applications, mobile radio, aviation & air traffic communications ...

Antenna Loading Problems and Solutions

Antenna Loading Problems and Solutions, August 1947 Radio News - RF CafeMost of us here in America recognize the Packard Bell name from the line of personal computers they sold in the 1980s and 1990s. I owned three of them, beginning with an Intel 80286 model, then an 80486, and finally a Pentium model. They were in the "pizza box" format that sat on the desk with the CRT monitor on top; I always preferred that configuration over the tower type. Before Packard Bell made personal computers, they made personal radios for the desktop beginning back in the 1930s. That explains why Mr. J.T. Goode, an engineer with Packard Bell, would write an article in 1947 regarding a method to tune antennas using light bulbs ...

Watch Live Landing of NASA's InSight Mars Probe

Watch Live Landing of NASA's InSight Mars Probe - RF CafeBe sure to check in on Monday, November 26th, at around 3:00 pm EST to watch the "live" landing of NASA's InSight (Interior Exploration using Seismic Investigations, Geodesy and Heat Transport) probe on Mars. "Live," of course, is a relative thing when the telecast is coming from Mars. The physical distance to Mars will be a little more than 89 million miles away, which corresponds to just tad under 8 minutes for radio waves, so we won't know how the landing went until that long after the event really occurs. NASA controllers will still have their usual "7 minutes of terror" as with Curiosity. InSight will use a combination of old-fashioned rigid, spring-loaded legs (a la Viking landers) and a modern automated rocket descent. I'll post this again on Monday as a reminder.

Empower RF Systems Demos Battle Hardened EW Emitter at AOC Convention

Empower RF Systems Demos Battle Hardened EW Emitter at AOC Convention - RF CafeEmpower RF Systems will demonstrate a suite of high power solid state transmitting amplifiers at the 55th Annual AOC International Symposium and Convention - Washington, DC November 27 – 29th , 2018. The equipment suite consists of the models 2162, 2170, and 2215 providing compact and rugged EA, communications, and threat emitter capability from 20 to 6000 MHz, and will be housed in Los Angeles while being controlled and monitored by the Empower booth demonstration team who will be exercising the system software demonstrating capabilities of the configurable amplifiers ...

KR Electronics: RF & Microwave Filters

KR ElectronicsKR Electronics designs and manufactures high quality filters for both the commercial and military markets. KR Electronics manufactures all filter types: lowpass, highpass, bandpass, bandstop and individually synthesizes 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. Please visit their website today to see how they might be of assistance ...


Hack Turns RFID Tag into Battery-Free IoT Device

Hack Turns RFID Tag into Battery-Free IoT Device - RF Cafe"Canadian researchers use scissors and glue to transform RFID tag into device that can sense its environment. While smart devices are proliferating in the industrial and domestic environments, concerns remain that they will not be sustainable unless their need for batteries and/or charging is removed. Researchers at the University of Waterloo in Ontario, Canada, are claiming a major advance in this area through making simple modifications to a radio frequency identification (RFID) tag, a battery-free device used to make objects machine-readable for the location and identification, and which are increasingly ubiquitous in common objects ..."

Plotting Coverage Circles for Satellite Communications

Plotting Coverage Circles For Satellite Communications, January 24, 1964 Electronics Magazine - RF CafeOne of the major advantages of the age of powerful personal computers - be they in the form of desktop systems, tablets, or smartphone apps - is that for most computation-intensive tasks there only needs to be one or maybe at most a few people smart enough to know how to do them. Everyone else who has to perform the task just needs to be able to input the proper parameters to ensure a useful output. That is a significant statement, because in the days before ubiquitous computer availability and incredible computing power, highly capable engineers, scientists, analysts, and mathematicians either had to be on staff or an expert external resource was used for difficult and/or time-intensive tasks. Over time, fewer and fewer people are needed to produce very precise and reliable results. In many ways, other than the creative intuition involved in concept, creation, and execution ...

Maximize Your LinkedIn Presence with These Tips & Tricks

LinkedIn Tips & Tricks - RF CafeRevResponse has been offering free high tech whitepapers, app notes, magazine subscriptions, and books for many years. LinkedIn, as you probably know, has become a major force in the professional career networking realm. Whether your goal is to find a new job, properly quit an existing job, locate special interest groups, research topics on interest, or other such things, LinkedIn is a good first stop. Here are a few resources currently available: "LinkedIn Mistakes that Cost You Clients and Credibility," "Maximizing LinkedIn for Business," "Optimize Your LinkedIn Skills," and "How to Network on LinkedIn Like a Pro." You're welcome.

The Cryotron Files: How the Inventor of the Microchip Put Himself in the KGB's Sights

The Cryotron Files: How the Inventor of the Microchip Put Himself in the KGB's Sights - RF Cafe

Longtime RF Cafe visitor, electrical engineer, and occasional contributor Alan H. Dewey sent me a note yesterday saying a book for which he helped provide a large amount of research data has been published by authors Iain Dey and Douglas Buck. "The Cryotron Files: How the Inventor of the Microchip Put Himself in the KGB's Sights," is an extensive delve into the background of Dr. Dudley Allen Buck, whose son, Douglas, conducted an extensive investigation into his father's mysterious death that happened to coincide with the death of his father's colleague and two other scientists just days after being visited by Soviet computer experts. Dr. Buck was a superconductivity researcher during his short, highly productive life. A cryotron, BTW, is a superconducting switch that would make for very low power supercomputers if it could be made practical in IC form ...

App Note: Isolator and Circulator Basics

Isolator and Circulator Basics by MECA Electronics - RF cafeMECA Electronics has created an app note titled "Isolator/Circulator Basics" on their website blog. "An RF isolator is a two-port ferromagnetic passive device which is used to protect other RF components from excessive signal reflection. Isolators are common place in laboratory applications to separate a device under test (DUT) from sensitive signal sources. An RF circulator is a three-port ferromagnetic passive device used to control the direction of signal flow in a circuit and is a very effective, low-cost alternative to expensive cavity duplexers in base station and in-building mesh networks. Examples of both applications will be covered later in this article. " You can find app notes for power coupler, dividers, and combiners, passive intermodulation products, hybrid couplers, and more on MECA Electronics' website blog  ...

Communications Satellites - Key to World-Wide TV

Communications Satellites - Key to World-Wide TV, March 1960 Popular Electronics - RF CafeIn 1960, futurists were predicting that within 10 years it would be possible to beam television signals between continents and directly into homes. It was the eve of Project Echo, which boosted a 100-foot-diameter inflatable metallized plastic ball into low Earth orbit to reflect signals efficiently back through the atmosphere. Engineers and scientists were already planning the next best thing - a satellite that not only reflected, but also amplified, possibly frequency converted, and would even steer signals that impinge upon it. Envisioned in this article is hundreds of satellites being available for relaying signals between all regions of the Earth on then-standard VHF channels. We now have successful satellite television systems, but they operate at Ku-band due to bandwidth requirements and need special converters to interface ...

Rohde & Schwarz Vector Network Analyzer Fundamentals Primer

Rohde & Schwarz Vector Network Analyzer Fundamentals Primer - RF CafeRohde & Schwarz USA (R&S USA) has produced a primer titled, "Fundamentals of Modern Vector Network Analyzers - Primer." One of the most common measuring tasks in RF engineering is the analysis of circuits, from simple filters and amplifiers to complex satellite communication modules. As an extremely versatile test instrument, a VNA is the ideal equipment for quickly and precisely uncovering signal integrity problems, such as reflections and crosstalk. This primer describes the fundamentals of vector network analysis, as well as practical instructions for improving accuracy, performing calibration, and making typical linear and time-domain measurements. In this primer you will learn about: Introduction to Network Analyzers Scattering Parameters ...

Innovative Power Products: RF & Microwave Passive Components

Innovative Power ProductsInnovative Power Products (IPP) has over 30 years of experience designing & manufacturing RF & microwave passive components. Their high power, broadband couplers, combiners, resistors, baluns, terminations and attenuators are fabricated using the latest materials and design tools available, resulting in unrivaled product performance. Applications in military, medical, industrial and commercial markets. Take a couple minutes to visit their website and see how IPP can help you today ...

Intel Multimode, 6 Gbps, 5G Modem in Phones by 2020

Intel Multimode, 6 Gbps, 5G Modem in Phones by 2020 - RF Cafe"Intel announced a new 5G chip for smartphones and other gadgets that the company will release next year. The company said it expects the chip, which supports speeds up to 6 Gbps, to ship in commercial devices starting in 2020. That timeframe is notable considering Fast Company reported that Apple will launch a 5G iPhone with Intel's 5G chip in 2020. The Fast Company report even cited the model number of Intel's chip - 8161 - which is just one digit off from the name of Intel's chip announced today, the XMM 8160 5G modem. Intel's Cormac Conroy, VP and GM of the company's communication and devices group, declined to discuss Apple and Intel's 5G customer prospects ..."

The 1933 World's Fair Radio Amateur Exhibit

The World's Fair Radio Amateur Exhibit, December 1933 QST - RF CafeThe 1933 "Century of Progress" World's Fair, held in Chicago, was a big deal on many fronts. Life in America and around the world was changing rapidly due to the widespread introduction into homes a decade earlier of electrical and telephone service, indoor plumbing, and associated appliances. The state of the art was a modern wonder. Transportation had been made affordable to many families, and leisure time was becoming more abundant. If it were not for the advent of the stock market crash in 1929, economies would be thriving because there was so much cool stuff to be had. Many people had taken up the hobby and/or profession of wireless communications, so a display was included on the fairgrounds for the craft. An interesting consequence of a combination of noisy (electrically) electromechanical wonders being promoted and the desire to demonstrate working amateur radio ...

ConductRF Rugged Test Cables for Field Engineers

ConductRF Rugged Test Cables for Field Engineers 11/19/2018 - RF CafeConductRF's SiteFlex range of ruggedized Field RF Test Cables are designed Field Test Engineers working in applications that require on site RF Testing. These cables are directly compatible with Hand-Held Network and Spectrum analyzers. Common options include: DC to 7 GHz, DC to 9 GHz, DC to 18 GHz, DC to 27 GHz, DC to 40 GHz, and DC to 50 GHz. ConductRF's Site-Flex RF Field Test Cables have been designed to support Handheld RF & Microwave Analyzers. The ruggedized construction includes anti-torque connectors that are firmly attached to the cables external armor. Crush resistant SF series cable can withstand 1,200 lbs. / sq.in. Additional configurations and lengths are available on request ...

Electronics Newsletter - Mars Reentry Vehicle

Electronics Newsletter (Mars Reentry Vehicle), January 24, 1964 Electronics Magazine - RF CafeRemember when the first manned spacecraft transported astronauts to Mars and then back to Earth in the 1970s - a 13-month round trip? In the mid-1960s, Electronics magazine reported on the preparations being made by NASA for Mars travel at the same time they were busy preparing the Apollo mission to the moon. The world's first manned orbit (Apollo 8) of the moon didn't happen until in December 1968, a mere seven months before the historic July 1969 Apollo 11 moon landing*, but NASA was wasting no time planning for the next big thing. Of course you know to date we never have made it to Mars with a manned spacecraft, but the headlines are still filled with "any day now" projections by SpaceX's Elon Musk (whom I like) and his contemporaries. Sure, I would love to be alive to witness a manned mission to Mars, but I'd settle ...

Many Thanks to Centric RF for Their Continued Support!

Centric RF microwave components - RF CafeCentric RF is a company offering from stock various RF and Microwave coaxial components, including attenuators, adapters, cable assemblies, terminations, power dividers, and more. We believe in offering high performance parts from stock at a reasonable cost. Frequency ranges of 0-110 GHz at power levels from 0.5-500 watts are available off the sheld. Order today, ship today! Centric RF is currently looking for vendors to partner with them. Please visit Centric RF today ...

Microwave Workshops & Exhibition 2018

Microwave Workshops & Exhibition 2018 - RF CafeMicrowave Workshops & Exhibition 2018 (MWE2018) will be held on November 28-30, in Yokohama, Japan in the Exhibition Hall D & Annex Hall, Pacifico. Sponsored by the IEICE APMC Japan National Committee and supported by the Ministry of Internal Affairs and Communications, the agenda includes workshops in 5 special sessions are allocated to treat fusion of different technical areas / fields, such as quantum computing and social infrastructure. 19 regular sessions cover the latest microwave technologies from active and passive devices to next generation applications and systems such as 5G mobile communication systems, wireless power transmissions and automotive/vehicular applications. 5 fundamental and 4 introductory ...

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Kirt Blattenberger

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About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2018
    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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