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"The best computer is a man, and it's the only one that can be mass-produced by unskilled labor." - Wernher von Braun

Today in Science History

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

Structural Shifts in Semi Industry Spawn New Trends

• ARRL Announces 2019 Teachers Institutes on Wireless Technology Sessions

• Gearing up for Defense Industry's Digital Transformation

FCC to Pause T-Mobile/Sprint Merger for 3rd Time

Solar Storm "Threat to Modern Society"

2020 $718.3B DOD Budget Up 4.7% over 2019

• Nokia Leads GSM-Railway Connectivity Market

Stretchable Electronics Breakthrough Thanks to Carbon Nanotubes

• European Parliament Urges Action Against Chinese 5G Threat

RF Cafe Forums Archive

Thousands of old forum topics - still useful.

Software Defined Radio Handbook (Pentek) 14th Edition

Software Defined Radio Handbook (Pentek) - RF CafePentek has published the 14th edition of their popular "Software Defined Radio Handbook." The download is free, but you need an account to access it on their website. Written by Pentek vice-president and cofounder Roger Hosking, it is mostly an infomercial for their products, but the first dozen pages contain good background information on topics such as sampling, principles of SDR, and FPGAs. A readily accessible version is available here if you do not like creating new accounts ...

3D Printer Uses Ray of Light to Shape Complex Objects

3D Printer Uses Ray of Light to Shape Complex Objects - RF Cafe"A 3D printing technique from UC Berkeley shapes objects all at once rather than layer by layer, allowing for more complex and smooth objects. A new light-based 3D-printing approach and machine can fabricate complex objects in minutes that are smoother and more flexible than what's currently possible. Dubbed the 'replicator' - a reference to the Star Trek television program - and developed by researchers at UC Berkeley, the printer uses a ray of light to transform liquids into objects all at once rather than layer by layer, which is how typical 3D printers create objects. The replicator was a device on the famous program that would materialize any object ..."

Hams in the FBIS

Hams in the FBIS, January 1945 QST - RF CafeWe hear and read a lot in the news about the electronic surveillance carried out by governments - on both foreign entities and civilians. If you think this is a phenomenon that has only existed since the age of cellphones and the Internet, you might be interested in this article that appeared in a 1945 issue of the ARRL's QST magazine. Long before the entire textual content of the Encyclopedia Britannica could be carried on a USB stick in your pocket - and access virtually all the information in the world on your iPhone, engineers were developing recording media to facilitate the capturing and later analysis of over-the-air and wired communications. They wanted both encrypted and unencrypted conversations. The National Archives has a huge store of magnetic tapes, vinyl discs ...

Smiths Interconnect Looking for an RF Test Coordinator

Smiths Interconnect Looking for an RF Test Technician - RF CafeSmiths Interconnect currently has a job opportunity for an RF Test Coordinator. Smiths is always looking for curious minds. For new colleagues who want responsibility and relish a challenge. Those who would like to use their talents to help make the world safer, healthier, more efficient and more connected. Job Description: Coordinates and performs the operation, training, maintenance and continuous improvement of the BTPA RF lab, Compact Antenna Test Range (CATR) & Environmental Stress Screening (ESS) lab, and the MMW Far-Field (FFR) & Near-Field Ranges (NFR). Duties & Responsibilities: Utilize engineer drawings, test procedures, and processes to support Antenna mechanical and test assemblies. Plan performance schedule for various test and measurement needs to support production schedule and SII's internal / external customers. Assist Manufacturing Engineering and Test Coordinators ...

Nanosatellites Could Be Answer to Mobile Not-Spots

Nanosatellites Could Be the Answer to Mobile Not-Spots - RF CafeHa! I've never heard the term "not-spot" before to describe a area with no coverage. "Start-up UbiquitiLink reckons it’s cracked the challenge of affordable satellite connectivity to regular handsets through the use of nanosatellites. You can't use traditional geostationary satellites to fill regular cellular coverage gaps because they're too expensive and are positioned 35,000 km above the surface of the earth, which is way further than cellular signals are designed to go and introduces excessive lag to the signal. An obvious solution is to use satellites at a much lower orbit, but until now that hasn't been economically viable. UbiquitiLink reckons it has the answer to this conundrum and went to MWC last week to tell everyone all about it ..."

PCB Directory: Printed Circuit Board Fabrication & Assembly

PCB  Directory - RF Cafe

PCB 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 (e.g., material, flexible, rigid), Geographical location, and more ...

RF Cafe Engineering & Science Crossword Puzzle for March 17

RF Cafe Engineering & Science Crossword Puzzle March 17, 2019This very large crossword puzzle will keep you busy for a while. Since 2000, I have been creating custom technology-themed crossword puzzles for the brain-exercising benefit and pleasure of RF Cafe visitors who are fellow cruciverbalists. The jury is out on whether or not this type of mental challenge helps keep your gray matter from atrophying in old age, but it certainly helps maintain your vocabulary and cognitive skills at all ages. A database of thousands of words has been 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 ...

New Technology Sparks an Expansion for Germanium Transistors

New Technology Sparks an Expansion for Germanium Transistors, April 6, 1964 Electronics Magazine - RF CafeWhilst reading articles on semiconductor research and development in the era of this 1964 Electronics magazine, it often occurs to me that much of the terminology presented is new to most people in the electronics field, having been just recently coined by those developing the technology. To wit, here author Landress shows diagrams of planar and mesa structures for transistors. We are so familiar by now with those configurations that it hardly seems there was a time when engineers did not speak so matter-of-factly of them. Hole and electron mobilities were terms familiar to a niche group of atomic materials scientists a decade earlier, as were diffusion depth and doping concentrations. As the 1919 electronics practitioner would confabulate upon matters of thermionic emission and getter flashing in vacuum ...

PEI-Genesis Connectors & Cable Assemblies

PEI-Genesis Cables & Connectors - RF CafePEI-Genesis is a global leader in the design and assembly of custom engineered connectors and cable solutions for harsh environments. PEI develops custom interconnect solutions that support the harsh environments of the aviation, energy, military, industrial, rail, and medical sectors worldwide. Proprietary automation in mirrored factories around the world allows PEI to assemble, from one of the largest inventories of electronic components, according to customers' specific requirements. PEI-Genesis has been listed on the related Vendors listing pages. Free shipping for orders >$40 ...

Withwave Intros VNA Automatic Calibration Module

Withwave Intros VNA Automatic Calibration Module - RF CafeWithwave's Automatic Calibration Module (W1202A) is ideal for users who want fast and easy calibration for various Vector Network Analyzers (VNA). This module is powered up via USB or F5.5 DC connector and communicate with VNA via USB or LAN and designed for full one-port through two-port calibrations of VNAs by One-Push START button. This module works as host systems, measures and calculates calibration coefficients and sends it to VNA easily. Most of Electronic Calibration Kits work for same manufacturer's VNAs only. But, this module provides cost-effective calibration solution for users by supporting various VNA models: Keysight PNA & ENA series, R&S ZVL, ZVA & ZVT series, Anritsu ShockLine Series ...

1000s of Semiconductor Nuclei 'Quantum Dance' in Unison

Thousands of Semiconductor Nuclei 'Quantum Dance' in Unison - RF Cafe"A team of Cambridge researchers have found a way to control the sea of nuclei in semiconductor quantum dots so they can operate as a quantum memory device. Quantum dots are crystals made up of thousands of atoms, and each of these atoms interacts magnetically with the trapped electron. If left alone to its own devices, this interaction of the electron with the nuclear spins, limits the usefulness of the electron as a quantum bit - a qubit. Led by Professor Mete Atature, a Fellow at St John's College, University of Cambridge, the research group, located at the Cavendish Labor ..."

Associate Layout Engineer Needed by QuinStar Technology

Associate Layout Engineer Needed by QuinStar Technology - RF CafeQuinstar Technology, an AS9100 certified aerospace hardware design and manufacturing company in Torrance, CA, is currently looking for an Associate Layout Engineer to join our team! We are primarily Looking for a highly motivated quick learner with a bachelor of science degree in electrical engineering or equivalent industry experience who is a US citizen. Should have experience creating hybrid RF circuit assembly drawings using AutoCAD or equivalent, drafting mechanical drawings, and/or using Vee test software is desired! Preference given to candidates with related experience. Primary job responsibilities include supporting MMIC design/development, reviewing engineering MMIC layouts ...

Empower RF Systems: RF & Microwave Power Amplifiers

Empower RF SystemsEmpower RF Systems is a global leader in power amplifier solutions. Empower RF Systems is an established and technologically superior supplier of high power solid state RF & microwave amplifiers. Our offerings include modules, intelligent rack-mount amplifiers, and multi-function RF Power Amplifier solutions to 6 GHz in broadband and band specific designs. Output power combinations range from tens of watts to multi-kilowatts. Unprecedented size, weight and power reduction of our amplifiers is superior to anything in the market at similar frequencies and power levels ...

ConductRF Flexible & Hand Formable Solutions

ConductRF Precision D38999 RF & Mixed Signal Cables - RF CafeConductRF offers an extensive line of RF and mixed signal cable harnesses and assemblies with custom configurations, lengths and markings. Thousands of combinations of coaxial, power, and digital and analog signal connectors available. Flexible phase-stable, low-loss, phase-matching, high power, and other options per your requirements. Broad insert connector solution choices including BMA, SMPM, for cable sizes #8, #12 & #16 Custom marking and ruggedization enhancements capability. Contact ConductRF today and let us help your project ...

Notable Quote: Wernher von Braun

Wernher Magnus Maximilian, Freiherr von Braun - RF CafeWernher Magnus Maximilian, Freiherr von Braun, chief designer of the V−2 rocket that terrorized London in the 1940s and chief architect of the Saturn V rocket that launched the first men to the moon in the 1960s, is quoted as saying, "The best computer is a man, and it's the only one that can be mass-produced by unskilled labor." von Braun was one of many German scientists conscripted to do the National Socialist German Workers Party (aka Nazi) regime's bidding during World War II - formally an Schutzstaffel (aka SS) officer. He and his research team surrendered to the Americans in 1945 after escaping to Austria when the end of the Third Reich was imminent. His willingness to be part of the Nazi German war effort is fuzzy; therefore, I have a hard time fully appreciating his significant contributions to the U.S. space program. Reportedly, von Braun experienced a genuine Christian religious conversion that changed his life.

Design PCBs for EMI: How Signals Move

Design PCBs for EMI: How Signals Move - RF CafeKenneth Wyatt has an article on the EDN website titled, "Design PCBs for EMI, Part 1: How Signals Move," that should be useful to anyone looking for tips on the subject. Says Kenneth, "After helping clients get their products compliant for EMI, I've seen one underlying issue: Poor PC board design. In my experience, IoT product designers run into problems caused by poor PC board design. Poor design can cause endless delays when on-board energy sources disrupt sensitive receiver circuits, resulting in cellular compliance failures. GPS and Wi-Fi receivers can also lose sensitivity ..."

Job Opening: Smiths Interconnect Looking for an RF Test Technician

Smiths Interconnect Looking for an RF Test Technician - RF CafeSmiths Interconnect currently has a job opportunity for an RF Test Technician. Smiths is always looking for curious minds. For new colleagues who want responsibility and relish a challenge. Those who would like to use their talents to help make the world safer, healthier, more efficient and more connected. Job Description: To test and troubleshoot Smiths Interconnect products to ensure high quality. Duties & Responsibilities: Solid understanding of electronic and microwave test equipment including VNAs, signal generators, power amplifiers, pulse generators, o-scopes, multimeters and associated hand tools. Ability to assemble RF test fixtures and burn-in test fixtures, troubleshoot RF test fixtures and test setups, documentation of test procedures ...

NASA to Demonstrate X-Ray Based Space Communications Technology

NASA to Demonstrate X-Ray Based Space Communications Technology - RF Cafe"NASA is set to demonstrate a new experimental type of deep space communications technology on the ISS this spring. Currently, NASA relies on radio waves to send information between the spacecraft and Earth. Emerging laser communications technology offers higher data rates that let spacecraft transmit more data at a time. This demonstration involves X-ray communications, or XCOM, which has numerous advantages. X-rays have much shorter wavelengths than both infrared and radio. This means that, in principle, XCOM can send more data for the same amount of transmission power. The X-rays can broadcast in tighter beams, thus using less energy when communicating over vast distances. If successful, the experiment ..."

Anatech Electronics: Off-the-Shelf and Custom RF & Microwave Filters

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. Sam Benzacar's monthly newsletters address contemporary wireless subjects. Please visit Anatech today to see how they can help your project succeed ... 

Delco Radio Division of General Motors Employment Ad

Delco Radio Division of General Motors Employment Advertisement, March 6, 1964 Electronics Magazine - RF CafeI, along with probably most other people my age, habitually associate the brand name of Delco (Delco Electronics, technically) with General Motors (GM) electrical and electronic products such as radios, storage batteries, alternators, and spark plugs. Dayton Engineering Laboratories Co., of Dayton, Ohio, merged with GM's AC spark plug division in 1974 to become AC-Delco. I bought many sets of AC-Delco spark plugs for my cars over the years. Nowadays, GM's electronic products go by the name of ACDelco (no hyphen now). Attempting to research the full provenance of the modern-day AC-Delco is headache-inducing due to sell-offs to Delphi, Aptiv, and other entities. The best I can determine is that the contemporary ACDelco is a brand name for products that might be manufactured by many different companies. This advertisement searching for electrical and mechanical engineers ...

ERZIA (RF amplifiers, wireless, communications) - RF Cafe Rohde & Schwarz RTB2000 Digital Oscilloscope - RF Cafe
Rohde & Schwarz USA (RF Component Pocket Guide) - RF Cafe vidaRF RF & Microwave Components - 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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

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