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Google's Project Soli Uses Radar for Hand Gestures

Venture Capital Cash Surfers May See Waves Recede in Market Turmoil

Discarded e-Waste Mismanaged

What Does 'The Great Fall of China' Mean for British Industry?

EUV Breaks Through to Angstrom Wavelengths

High-Performance GaN on Low-Resistance Silicon

4G Smartphones Market Share More Than Doubles

Ham-Cyclist Completes U.S. Leg of His Trip Around the Globe

Radioactive Material Sent to Texas A&M Goes Missing

Using Physics to Calculate How Much Yoda Weighs

Seeing Quantum Motion

Chinese iPhone Users Hit by 'KeyRaider' Malware

Man Arrested After Facebook Videos of Him Tampering with Traffic Cameras

Electronic Component Sales Are Still Sluggish

Mobile Operators Turning to Ethernet Microwave for Voice and Data Backhaul

DoD, Silicon Valley to Partner on Flexible Electronics

Simplified Coil Calculation

Simplified Coil Calculation, May 1932 Radio-Craft - RF CafeThis might be one of the earliest printed instances of Harold A. Wheeler's simplified formulas for the three basic inductor forms. We all use them on a regular basis, but for most the origin was never known or has long since been forgotten (I fall into the latter category). I did some research on Wheeler's inductance formulas a few months ago when writing an app, so it was sort of déjà vu when this blurb appeared in a 1932 edition of Radio-Craft ...

App Note: Implementation Margin
of a Satellite Communication System

Noisecom App Note: Implementation Margin of a Satellite Communication System - RF CafeNoisecom is part of the Wireless Telecom Group. Abstract: The Implementation Margin of a Satellite Communication System is defined as the degradation of the signal after travelling through the up and downlink equipment. In order to find this, an EbNo generator such as the Noisecom CNG-EbNo Series can first be used to carry out an IF loopback test of the modem in order to find bit error rate (BER) values at different Eb/No ratios. A plot of these values can then be compared with the theoretical curve for the digital modulation scheme being used. The resultant difference is termed the implementation loss of the modem, and this value is used as a reference level for the second part of the test, in which the implementation margin of the complete up and downlink is ...

Wireless Engineering Crossword Puzzle

Wireless Engineering Crossword Puzzle for August 30, 2015 - RF CafeThis week's Wireless Engineering crossword puzzle contains the usual collection of science, math, and engineering terms, and also includes a couple topics that have been in the technical news headlines lately (clues labeled with asterisk *). Enjoy ...

RCA "Ultrafax" System 

RCA "Ultrafax" System, January 1949 Radio & Television News - RF CafeDon't let the title fool you. This 'Ultrafax' system developed by RCA in the late 1940s was essentially the first attempt at video on demand, or streaming video. Rather than piping the signal over cable or local broadcast frequency towers, a microwave link was used. While initial system equipment space and financial requirements meant only corporations, universities, and governments could procure an Ultrafax, engineers who developed the system envisioned an eventual culmination of equivalent systems in every home. Even at the end of the last century it was still not possible for program providers to personalize broadcasts to individuals. It wasn't until broadband Internet came on the scene in the 2000s that such services were possible. Now, a decade later, people watch any video they want on cellphones while riding in a car ...

Van de Graaff Generator in the Tail Boom

Van de Graaff Generator in the Tail Boom - RF CafeMechanically generated electrical noise has been the bane of wireless communications since the days of Marconi. I recently posted a 1930 article from Radio-Craft titled "More About 'Man-Made' Static" that addressed the plague. Electrical noise adversely affects electronics in a manner ranging from relatively harmless but annoying interference to destructive discharging. We are very familiar with ESD and the hazard it presents to electronic devices. Triboelectric charging and a subsequent rapid discharge is the culprit. Much research has led to ingenuous mitigation and prevention techniques that have practically eliminated the problem. Still, electrical noise crops up in some of the most unexpected places and must be dealt with. An article dealing with triboelectric charging and static discharge in radio controlled (R/C) helicopters, with the resultant radio interference ...

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FEKO Student Competition 2015

FEKO Student Competition 2015 - RF CafeThe FEKO Student Competition is an international contest organized annually by the FEKO team in support of engineering education. Open to students of colleges and universities from every country in the world who are aged 18 years and older at the time of entry, except for students in countries or at universities subject to a ban on receiving U.S. technology exports. Submission should highlight the problem solved with FEKO, including details on simulation setup, solution method used, results and result interpretation. The Competition will begin on April 1, 2015. Deadline for submissions is September 30, 2015. Entrants must use and complete the online registration form.

RCA Radio Tubes Advertisement

RCA Radio Tubes Advertisement, January 1939 Radio-Craft - RF CafeRCA, the Radio Corporation of America was not merely a manufacturer of radio, television, and phonograph equipment for home entertainment. The company also made vacuum tubes for all sots of electronic equipment, and produced a weekly radio broadcast called "Magic Key" on the NBC Blue Network. Sticking to their communications roots, RCA today markets televisions, microwave ovens, Android-based table computers, DVD / Blu Ray drives, telephones, 2-way radios, radios, clocks, antennas, and many other devices - with no tubes in sight, not even in their TV displays ...

Electronic Realism in Disneyland

Electronic Realism in Disneyland, April 1956 Popular Electronics - RF CafeDisneyland opened its gates in Anaheim, California on July 17, 1955. It was billed as the most high-tech theme park in the world, with a 'wow' factor on par with the World's Fair extravaganzas. One of its much-ballyhooed features was the 'realistic' jungle safari tour with life-like animal automatons and authentic 3-D jungle sounds. This article, published less than a year after opening day, highlights some of the equipment and methods used by artists and engineers to achieve the effects ...

Notable Quote: Putt's Law

Notable Quote: Putt's Law - RF Cafe"Technology is dominated by two types of people: Those who understand what they do not manage and those who manage what they do not understand." - Archibald Putt, Ph.D., from Putt's Law and the Successful Technocrat. Per the publisher, John Wiley & Sons, "'Archibald Putt' is the pseudonym of a man whose contributions in science, engineering, and R&D management are well known. He has served on government advisory committees, managed basic and applied research, and held executive positions in a large multinational corporation. He received his PhD degree from a leading institute of technology and has served as president of an international technical society. He is the author of numerous books and scholarly articles."

Electronics-Themed Comics

Electronics-Themed Comics July 1948 Radio News - RF CafeHere is a batch of electronics-themed comics that appeared in the July 1948 edition of Radio News. The comic on page 122 would probably elicit cries of racism or hate speech these days, even though there is nothing racist about it. My favorite is the one that appeared on page 175. There is a growing list of other comics at the bottom of the page ...

Men Who Have Made Radio:
James Clerk Maxwell

Men Who Have Made Radio: J. C. Maxwell, May 1930 Radio-Craft - RF CafeMaxwell's inception of the theory of electromagnetic radiation is compared here to if Christopher Columbus had conceptualized the existence of America and mapped its features based solely on observations of how the known oceans and land masses interacted. I have always been amazed at the ability of people who formulate entirely new theories of science, finance, medicine, etc., and manage to detail and support their ideas with hard data and mathematics. Einstein did so with relativity, Dalton did so with atomic structure, Darwin did so with evolution, Pasteur did so with germ theory; the list is long. There are lots of geniuses out there, but a relative few change the world ...

Coilcraft Filter Designer by Nuhertz

Coilcraft Filter Designer by Nuhertz - RF CafeCoilcraft recently announced a new version of their 'Filter Designer' software, which is a customized version of the Nuhertz Technologies' 'FilterSolutions' filter synthesis and analysis program. Filter Designer will generate schematics and response curves for 3rd-, 5th-, and 7th-order lowpass Elliptic filters that incorporate Coilcraft inductors. The functionality is therefore somewhat limited and, honestly, is probably more of an advertisement for the full-blown commercial version of the software, but I did find one aspect very instructive. If you have built a filter using real-world components, then you know how sensitive inductors are to package configuration, wire winding characteristics, and placement on the circuit board. A simulation can be utterly worthless in predicting the performance of a prototype filter if the modeling is ...

everythingRF Has Web's Largest
Database of Waveguide Components

everythingRF Has World's Largest Online Database of Waveguide Components & Manufacturers - RF Cafeeverything RF has recently updated its Directory for Waveguide Products & Manufacturers. There are over 20 waveguide component categories listed on everything RF. Users can search for products across multiple manufacturers using parametric search tools to narrow down on products based on waveguide size and other parameters based on the selected category. everything RF is working closely with a number of manufacturers to get all their product data listed on the site. It is a free service, so we encourage manufacturers to contact us to get ...

ADF 2015 Taiwan - Agenda Finalized
and Registration Opened

ADF 2015 Taiwan - Agenda Finalized and Registration Opened - RF CafeNI (formerly AWR Corporation) announces that the agenda has been set and registration opened for the AWR Design Forum 2015 (ADF) in Hsinchu, Taiwan on Tuesday, Sept. 22. Highlights of ADF 2015 Taiwan include the following technical presentations featuring NI AWR Design Environment software as well as customer design successes: Overview of NI AWR Design Environment V12, Module and Connector Design, Using Microwave Office and Analyst Software, LTCC Design and Verification with Microwave Office, Efficient Implementation and Design of ...

Sivers IMA Launches New
E-Band Converter

Sivers IMA Launches New E-band Converter - RF CafeSivers IMA today announces its launch of the next generation converter for E-band radio links. The new generation converter is based on the company’s proprietary SiGe chip and offers a cost-effective and high-performance solution for those who develop and market radio links or test and measurement equipment for manufacturing of radio links and devices. The new converter from Sivers IMAs is designed to support very advanced modulation schemes, which enables record breaking capacities of up to 10 Gbps ...

Keysight Technologies Webcast: Power
Module Design for Power Electronics

Keysight Technologies Webcast Explains How to Overcome Challenges in Power Module Design for Power Electronics - RF CafePower electronics engineers designing power modules face a number of challenges; namely, size, weight, efficiency, cost, and robustness. This free, 1-hour webcast will explore these challenges and lay out a new workflow for overcoming them. Topics include modeling and characterization of components and devices, such as GaN transistors, electrothermal co-simulation, and integration of GaN into power electronic circuits. Presented by Prof. Dr.-Ing. Ingmar Kallfass, chair for Robust Power Semiconductor Systems at the University of Stuttgart, and sponsored by Keysight, the webcast ...

Linx Technologies Intros Pre-Certified,
Low Cost RF Data Modules

Linx Technologies Intros Pre-Certified, Low Cost RF Data Modules - RF CafeLinx Technologies, a Merlin, OR based developer and manufacturer of Internet of Things (IoT) Products and Solutions, is pleased to introduce its new pre-certified, low cost RF data modules. The HumPRO™ Series transceiver is built on the popular Hummingbird platform, and is a frequency hopping spread spectrum (FHSS) transceiver designed for the reliable transfer of digital data. Available today in 900 MHz, the HumPRO™ 900 MHz version outputs up to 10 dBm. This results in a line-of-sight range of up to 1600 m (1.0 mile). The HumPRO™ Series module is a completely integrated RF transceiver and processor designed to transmit digital data across a wireless link. It employs a fast-locking FHSS system for noise immunity and higher transmitter output power as allowed by government regulations ...

Fairview Portfolio with New Family
of Waveguide Directional Couplers

Fairview Microwave Expands Waveguide Portfolio with New Family of Waveguide Directional Couplers - RF CafeFairview Microwave, a supplier of on-demand microwave and RF components, introduces their new family of precision waveguide directional couplers. This release consists of 28 models covering a frequency range from 18 GHz to 110 GHz in seven popular frequency bands including K, Ka, Q, U, V, E and W bands. Fairview Microwave's waveguide couplers are available in waveguide sizes from WR-42 up to 18 GHz all the way to WR-10 up to 110 GHz. These directional couplers are offered with 10 dB or 20 dB coupling values and have high directivity of 30 dB typical with insertion loss is as low as 0.6 dB in certain models. Fairview’s new waveguide couplers are available in both standard and split block configurations and are also available in both E-Bend and H-Bend designs. They utilize a multi-hole ...