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"Competition brings out the best in products and the worst in people." – David Sarnoff

Today in Science History

Saelig Intros EMCView PC Software for EMC Pre-compliance Testing TekBox

Saelig Introduces EMCView PC Software For EMC Pre-compliance Testing TekBox - RF CafeSaelig announces the availability of the TekBox EMCView Pre-compliance Testing Software. This PC-compatible software simplifies the process of EMC pre-compliance testing of radiated and conducted emissions. EMCView complements an emissions test setup of a spectrum analyzer, an LISN (Line Impedance Stabilization Networks) and an EMI-quiet TEM Cell. Built-in amplitude correction provides the correction and conversion coefficients for cables, amplifiers, attenuators, LISNs, TEM cells, antennas, RF ...

Many Thanks to Windfreak Technologies for Supporting RF Cafe

Windfreak TechnologiesWindfreak Technologies designs, manufactures, SynthNV: 34 MHz – 4.4 GHz RF Signal Generator w/ Power Detectortests and sells high value USB powered and controlled radio frequency products such as RF signal generators, RF synthesizers, RF power detectors, mixers, up/downconverters. Worldwide customers include Europe, Australia, SynthUSBII: 34 MHz – 4.4 GHz Low Cost RF Signal Generatorand Asia. Please contact Windfreak today to learn how they might help you with your current project ...

Linx Intros the HumPRC Series Remote Control Transceiver Solution

Linx Technologies Intros the HumPRC Series Remote Control Transceiver Solution - RF CafeThe HumPRCTM Series by Linx Technologies is a complete wireless remote control system. It supports both 8-button remote control and mixed remote control/data networks. In addition to modules, a finished remote (including plastics) is available which can be quickly modified for a customized solution. No programming is required, making it the easiest solution to implement. The HumPRCTM supports long-range operation at 868 MHz and 900 MHz for multi-region operation ...

IEEE COMSOC Webinar - October 26

Meeting the Challenges of the Millimeter Wave Radio Frequency Environment for 5G - RF Cafe"Meeting the Challenges of the Millimeter Wave Radio Frequency Environment for 5G" Date: Thursday, October 26, 2017, Time: 2:00 PM ET. "One of the primary challenges of 5G testing is both capturing information on the millimeter wave radio frequency environment as well as just understanding its operation. Both industry and academic research is still at an early phase of this work and for it to progress work must be done on a number of fronts in terms of test and measurement. For instance, better models are need ...

Communications Satellites

Communications Satellites, March 1972 Popular Electronics - RF CafeAuthor Len Buckwalter states in this 1972 article from Popular Electronics that at the time, radio channels were so crowded in California that police were using spectrum in the TV broadcast band for communication. The FCC was denying recreational boaters channel space in favor of commercial operators. The problem could not be blamed on available frequency space, but rather on the lack of inexpensive electronic components that worked above a kHz or so. Nowadays when you read in the news about such desperate need of spectrum that network owners pay millions or billions of dollars for a few measly MHz of bandwidth, the cause is truly an overabundance of devices vying for space. Although truthfully, you could claim that exactly the same ...

Anatech Electronics Newsletter for October 2017

Anatech Electronics Newsletter for October 2017 - RF CafeAnatech Electronics, a manufacturer of RF and microwave filters, has published its October newsletter. In it, Sam Benzacar asks the question "Whatever happened to NFC?" He does a brief history on the big plans for near field communication (NFC) as well as what likely doomed it - at least as originally envisioned. Finally, Sam suggests a great application for NFC that, combined with contactless charging (my interjection), could prove to be a huge market to resurrect NFC fever. There are also a few news items relevant to Anatech Electronics' business (that would be RF filters) ...

Many Thanks to Nova Microwave for Continuing Support!

Nova Microwave circulators & isolatorsNova Microwave is a leader in technically differentiated electronic and radio frequency Ferrite Circulators and Isolators that connect, protect and control critical commercial and military wireless telecommunications systems. Our staff is dedicated to research and development of standard and custom design quality Ferrite Circulators and Isolators from 380 MHz to 26.5 GHz. Please visit Nova Microwave today ...

Keysight Demos Simulation, Measurement at EPEPS 2017

Keysight Technologies Demonstrates Advances in High-Frequency Simulation, Measurement Solutions at EPEPS 2017 - RF CafeKeysight Technologies will showcase the latest releases of its high-frequency simulation and measurement tools at the electrical performance of electronic packaging and systems 2017 (EPEPS 2017) conference, the premier event for advanced and emerging issues in electrical modeling, analysis and design of electronic interconnections, packages and systems. Keysight will demonstrate the following new software capabilities at the event ...

Advanced Multipoint Radios Exceed Customer Capacity Expectations

Exceeding Customer Capacity Expectations with Advanced Multipoint Radios - RF Cafe"Over the last 10 years Comsol has grown from providing Integration solutions to providing fully managed wireless services. This new market offering has allowed our customers to no longer invest in specialized wireless infrastructure which creates strain on their balance sheet but, rather, to buy an all-in connectivity service from Comsol and build this into easily managed OPEX budgets ..."

How We Measure Noise

How We Measure Noise, January 1973 Popular Electronics - RF CafeThis article on noise measurement is not about electrical noise, but rather on audible noise. It appeared in a 1973 edition of Popular Electronics magazine during an era when hi-fi stereo equipment was becoming a big deal. Author Carl Alsen, an engineer at General Radio, reviews methods of sound level measurement and presents values for some familiar sources. Radio manufacturers had/have a vested interest in background noise that affects the satisfaction of their customers. Ambient noise in all realms has been a rapidly growing problem in terms of information transmission and reception ...

Sr. RF Design Engineer Needed in Texas by Genie Company

Sr. RF Engineer Needed in Texas by Genie Door Company - RF CafeHere is a great opportunity to help design products that millions of people will use. The Sr. RF Design Engineer will play a central role in the development and design of important new products where RF performance is very important for our remote controls and connected products. You will be able to take pride in seeing your designs used by your friends, neighbors, and in seeing them on the shelves at home stores. This highly visible senior role will involve close collaboration with the rest of the new product development team to produce new sub-gigahertz (UHF) remote ...

Engineering Crossword Puzzle w/Weekly Headlines October 22

RF Cafe Engineering Crossword Puzzle w/Weekly Headlines October 22, 2017For the sake of avid cruciverbalists amongst us, each week I create a new technology-themed crossword puzzle using only words related to engineering, science, mathematics, chemistry, physics, astronomy, etc. At least 10 clues in this puzzle with an asterisk (*) are pulled from this past week's (10/16 - 10/20) "Tech Industry Headlines" column on the RF Cafe homepage (see the Headline Archives page for help).  cruciverbalist: [noun]  cruci- ("cross") +‎ verbal ("words") +‎ -ist ("agent, person") -- A person who constructs crosswords ...

ViaSat Throws Tantrum over European In-Flight Connectivity

ViaSat Throws Temper Tantrum over European In-Flight Connectivity - RF Cafe"ViaSat has decided to throw a hissy-fit over the Ofcom decision to grant Inmarsat a license for its European Aviation Network, threatening legal action over the move. Ofcom must be sitting back and wondering if it is able to do anything right. Every decision it seems to make is met with a chorus of lawyers serenading the watchdog to the legal dance floor. Three is usually the one who complains it isn’t getting more help despite not putting its hand ..."

Mini-Circuits Mid-October News & Product Highlights

Mini-Circuits Mid-October News & Product Highlights - RF CafeMini-Circuits announces the availability of four new devices in its lineup of RF and microwave components. Included are an extra-long-life absorptive electromechanical SP4T switch for DC to 18 GHz, a 2.4 mm (female to male) adapter covers DC to 50 GHz for industry-leading value, a surface-mount bandpass filter for 95 to 105 MHz with excellent selectivity, and an ultra-high dynamic range MMIC amplifier providing +46.1 dBm IP3 from 0.03 to 2.7 GHz ...

DT Claims Europe's 1st 5G Antennas in Berlin

DT Claims Europe's 1st 5G Antennas in Berlin - RF Cafe"Deutsche Telekom has got four of its radio cells in Berlin pumping out shiny New Radio goodness in a real-world setting, claiming a European first. Technically this is 'pre-standard 5G NR,' but the lack of a standard hasn't stopped everyone banging on about 5G for year and DT isn't about to miss out on all the gun-jumping fun. We’re told this mini-network is managing a throughput of 2 Gbps so a single device and a latency ..."

Electrons Under Extreme Conditions Described for 1st Time

Electron Behavior Under Extreme Conditions Described for 1st Time - RF Cafe"Researchers have modeled the actions of electrons under extreme temperatures and densities, such as those found within planets and stars. The work could provide insights into the behavior of matter in fusion experiments, which may one day lead to a sought-after source of clean energy. Electrons are an elementary component of our world and determine many of the properties of solids and liquids ..."

The How and Why of the SCR

The How and Why of the SCR, November 1972 Popular Electronics - RF CafeDid you know that General Electric introduced the first silicon-controlled rectifier (SCR) for commercial use? It was in 1957. The SCR was one of the first really high power devices in the semiconductor industry, not for its voltage and power gain, but for its ability to switch very large currents on and off while having a relatively low "on" voltage drop. This article gets into the basic theory, operation, and application of the SCR. The S-band airport surveillance radar that I worked on in the USAF originally used a vacuum tube thyratron to trigger the magnetron's pulse forming network, but that tube was replaced with a solid state SCR circuit that plugged directly ...

Hurricane Maria Scrambled Puerto Rico's Humacao Solar Plant

Hurricane Maria Scrambled Puerto Rico's Humacao Solar Power Plant - RF Cafe"After the destruction inflicted across the Caribbean by hurricanes Harvey, Irma, and Maria, renewable energy advocates are calling for a rethink of the region's devastated power systems. Rather than simply rebuilding grids that delivered mostly diesel generation via damage-prone overhead power lines, renewables advocates argue that the island grids should leapfrog into the future by interconnecting hundreds or thousands of self-sufficient solar microgrids ..."

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

Tech Pours Millions into Lobbying

CR Says Old Samsung Phones Beat iPhone 8

Verizon Walks Back Its 5G Wireless Hype

Navy to Enhance EW Receivers EA-18G Aircraft

QRZ DX and The DX Magazine Publisher Carl Smith, N4AA, SK

U.S. Tech Giants May Find Their Future Shaped by Europe

Caribbean Telecommunications Union Head Calls for "New Generation" of Hams

FCC Further Extends Waiver on RF Equipment Information Collection Requirements

Vodaphone Says EU Could Learn from India on Spectrum Allocation

iPhone 7 Selling Faster Than iPhone 8

Automotive Radar Simulation Webinar

Hassan Chreim Automotive Radar Seminar - RF CafeOctober 26, 11:00 am to 12:00 pm EST. Presenter: Hassan Chreim. CST Webinar Series: Automotive radar is becoming increasingly important for car designers, due to the huge role it plays in securing and ensuring the driver's safety. In this webinar, we will show how CST STUDIO SUITE can be used to perform and study all of the design stages of automotive radars, starting from the basic element which is the antenna, through its integration inside a radome, to actually placing and calibrating the whole package ...

Notable Tech Quote: H. Ward Silver

H. Ward Silver, Notable Tech Quote - RF Cafe"I don't know the last time you purchased some new coax, but it's sold by the foot and can cost an arm and a leg!" - H. Ward Silver, QST magazine, October 2017, Hands-on- Radio (p71). 

ConductRF RF Test Cables for Field Engineers

ConductRF RF Test Cables for Field Engineers 10/17/2017 - 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. Options include DC to 7 GHz through DC to 50 GHz. 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 ...

Fuses for Electronics

Fuses for Electronics, July 1972 Popular Electronics - RF CafeDeciding which fuse to use as a replacement for a blown fuse is usually a simple matter - read the part number or electrical parameters (current, voltage) off the package and make sure of its type (fast or slow blow). Of course whenever a fuse blows, you usually have more or a problem than just a bad fuse. Deciding which fuse to use when designing a circuit which requires overcurrent protection requires a lot more consideration. This article from fuse making company Bussmann's Charles James gives a brief introduction to the kinds of parameters you need to factor into a selection. There's more to it in most cases - especially ...

Quantum Spin Current Detection Potential for Alternative Electronics

Spin Current Detection in Quantum Materials Potential Alternative Electronics - RF Cafe"A new method that precisely measures the mysterious behavior and magnetic properties of electrons flowing across the surface of quantum materials could open a path to next-generation electronics. Found at the heart of electronic devices, silicon-based semiconductors rely on the controlled electrical current responsible for powering electronics. These semiconductors can only access the electrons' charge for ..."

Qualcomm Gets OK to Conduct 4.4-4.94 GHz 5G Tests in San Diego

Qualcomm Gets OK to Conduct 4.4-4.94 GHz 5G Tests in San Diego - RF Cafe"Qualcomm was granted FCC authorization to conduct experiments using a small 5G R&D development and demonstration network at 4.4-4.94 GHz in its hometown of San Diego. Specifically, the location is within a 0.5-mile radius of Qualcomm's campus in the Sorrento Valley area of San Diego. The authorization is effective until October 1, 2019. The application lists 30 mobile units and four base stations to be used in a test network that will use a single TDD 100 MHz channel ..."

Printed-Circuit Kits for Short Runs

Printed-Circuit Kits for Short Runs, October 1969 Electronics World - RF CafePrinted circuit boards (PCBs), especially high density and many layered, were still a relatively new technology in 1969. Point-to-point wiring was still a large part of most products in the commercial, military, industrial, and aerospace worlds. Producing artwork and contracting for a lot of PCBs was rather expensive, especially in small quantities. Many people, including me, made quite a few single- and two-sided boards using photoresist pens and self-adhesive tape and pads, then bathing them in an etchant solution of ferric chloride. Through holes were made on a drill press and then traces and pads were tinned with flux and solder ...

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Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
Webmaster:
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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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