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Today in Science History

Mac's Service Shop: Servicing Without Service Data

Mac's Service Shop: Servicing Without Service Data, February 1974 Popular Electronics - RF CafeHere is an area of electronics that will be foreign soil to most Gen-Xers and Millennials - troubleshooting your malfunctioning radio, phone, television, garage door opener, kitchen appliance, etc. Admittedly, most modern devices are designed and priced to be replaced rather than repaired. Relatively cheap product replacement and service plans keep them going for a year or three until they are obsoleted by newer devices with whiz-bang additional features. However, there are many of us still around who are born to tinker and are too cheap to bear the thought of throwing something away before at least attempting to fix it. I have written often about how many ...

everythingRF Launches Photonics Resources Website

everythingRF Launches Photonics Resources Website - RF CafeGoPhotonics is an online product discovery platform for the Photonics sector. They list complete product catalogs of lasers, laser diodes and other photonics products from the leading manufacturers and make them searchable by specification. The parametric search tools on GoPhotonics have been developed for each category based the parameters that users would need to specify when looking for a product in the specific category. Laser Systems & Modules: We have over 10,000 Products listed from more than 200 manufacturers. Users can narrow down on lasers based ...

FinFETs Shimmy to 5G's Frequencies

FinFETs Shimmy to 5G's Frequencies - RF Cafe"Engineers at Purdue University and GlobalFoundries have gotten today's most advanced transistors to vibrate at frequencies that could make 5G phones and other gadgets smaller and more energy efficient. The feat could also improve CPU clocks, make wearable radars, and one day form the basis of a new kind of computing. They presented their results today at the IEEE International Solid-States Circuits Conference, in San Francisco. 5G transceivers need two key components: oscillators and filters. Oscillators produce the frequency ..."

Solid-State Scene: IC Comparators and Op Amps

Solid-State Scene: IC Comparators and Op Amps, May 1973 Popular Electronics - RF CafeIt is hard to imagine a time when integrated circuit (IC) comparators were a big deal, but as recently as 1973 when this article appeared in Popular Electronics, they were new to a designer's bag of tricks. Prior to an IC solution, comparators needed to be constructed from opamps and a handful of peripheral biasing components. As with other integrated circuits, not only does the overall price go down, but so does circuit board real estate, cost, temperature variability, and electrical parameter variance between devices. The first comparator circuit I remember designing was a temperature sensor that went in an oven used for curing the potting ...

Bluetooth Low-Energy Transceiver Slashes Consumption by over ½

Bluetooth Low-Energy Transceiver Slashes Consumption by over ½ - RF Cafe"Researchers at Tokyo Institute of Technology have announced a Bluetooth Low-Energy transceiver with the lowest ever power consumption, designed for use in the popular 2.4 GHz band. The breakthrough set to accelerate widespread adoption of Internet of Things (IoT) applications was developed by a group of researchers led by Kenichi Okada of Tokyo Institute of Technology, Japan. When transmitting, the transceiver consumes 2.9 milliwatts (mW) and when receiving, it consumes ..."

The Electronics Handbook, Second Edition

The Electronics Handbook, Second Edition - RF CafeSometimes it's still nice to have a hard copy reference book on hand rather than clicking through a PDF file. This 2640-page, 2nd edition of The Electronics Handbook, published by CRC, is such a book. Peruse the "Look Inside" page samples and you will see it is like a compilation of undergraduate textbooks plus table, charts, and graphs chock full of data. Analog, digital, RF and electric power topics are included. Check it out ...

Variable-Capacitance Diodes

Variable-Capacitance Diodes, July 1969 Electronics World - RF CafeIt appears that maybe Abraham Lincoln had a son who was an electrical engineer working at Motorola Semiconductor back in the 1960's. Put glasses on Honest Abe (I did) and author Irwin Carroll's a spitting image of the Great Emancipator. Seriously though, this article is a great introduction to the fabrication and use of variable capacitance (aka varicap and varactor) diodes. They have been - and still are - used widely for electrically tunable oscillator and filter circuits. Topics such as temperature and figure of merit ("Q") are discussed as well. This edition of Electronics World ran a series ...

Design and Simulate Phased Arrays with NI AWR Software

Application Example Demonstrates How to Design and Simulate Phased Arrays with NI AWR Software - RF CafePhased-array antennas are becoming popular for a variety of applications such as automotive driver assist systems, satellite communications and advanced radar and will be key components of upcoming 5G communications systems. This application example provides a brief overview of the simulation capabilities within NI AWR Design Environment, specifically Visual System Simulator™ (VSS), that address the complexity and cost issues involved in developing communications systems based ...

Engineering Career and Job Hunting Advice for February 2018

Engineering Career and Job Hunting Advice for February 2018 - RF CafeU.S. News and World Report published its annual list of the best jobs for the coming year. At the top is software developer, which is no surprise. The nice thing about software is that just about everyone has a shot at being "famous" through independent development because the tools needed range in cost from free to really cheap. The Internet and app stores provide the marketing venue - also free. Find out where electrical engineering ranks in the list ...

- The 100 Best Jobs for 2018
- Survey Reports That Engineers Salaries Are Up
- Letter to Future Engineers <more>

KP Debuts New 3 GHz Sector Antennas for WISP Applications

KP Debuts New 3 GHz Sector Antennas for WISP Applications - RF CafeKP Performance Antennas, a manufacturer of WISP antennas and accessories, announced today that it has released new high performance, 3 GHz sector antennas to its portfolio for use in WISP networks. KP's expanded line of 3 GHz sector antennas consists of four new models including the KP-3SX4-65 quad-port 18 dBi sector, the KP-3S3S-65SA which features two 3 GHz antennas in one radome, the KP-3DP65S-45 18 dBi Dual Polarized sector, and the KP-3DP120S-45 3 GHz sector which is specially designed for LTE applications ...

Church Spires to Boost Mobile Connections

Church Spires to Boost Mobile Connections - RF cafe"Church spires across the UK will be used to boost digital connectivity in rural areas following an agreement between the Government and the Church of England. The accord, signed by the the National Church Institutions (NCIs) of the Church of England, the Department for Digital, Culture, Media and Sport (DCMS) and the Department for the Environment, Food and Rural Affairs (Defra) encourages the Church of England to use its buildings and other property to improve broadband, mobile and WiFi connectivity for local ..."

ISSCC: 80 GHz Automotive Radar on One Chip

ISSCC: 80 GHz Automotive Radar on One Chip - RF cafe"Texas Instruments said 'yes' in an ISSCC paper devoted to a single-chip 76-81 GHz frequency-modulated continuous wave (FMCW) radar transceiver in 45 nm CMOS, which includes three transmitters, and four receivers with integrated ADCs. To support system-level functional safety, the design also features autonomous fault monitoring of the RF chain. The fast-chirp FMCW signal is generated in a closed-loop 19-20.25 GHz fractional-N frequency synthesizer, fed from a high frequency reference clock via ..."

BeRex Fast Switching, High Isolation, SPDT Switch for Wi-Fi, CATV, IoT, 5G

BeRex Intros BSW7221 Fast Switching, High Isolation, Reflective SPDT Switch for Wi-Fi, CATV, IoT and 5G Applications - RF CafeBeRex continues to expand its family of RF switches by announcing the availability of the BSW7221, a high isolation, SPDT RF switch with high linearity, low insertion loss, and a very fast, 90 to 135 ns, switching time making it ideal for demanding wireless switching applications such as Wi-Fi, CATV IoT and 5G applications. Using a single 2.7 to 3.6 V supply voltage, the BSW7221 switch provides a wide 1 to 6000 MHz frequency range ...

How Chrome Ad Blocking is Already Changing the Web

How Chrome Ad Blocking is Already Changing the Web - RF CafeIt's getting harder for companies to have their online advertisements seen by potential customers thanks to the popularity of ad blockers. Now, Google is building the ability into its own browser. "Google's browser doesn't go as far as full-on ad blockers and won't always stop ad trackers. But already it's cut ads on 42% of websites it's tangled with. What was once unthinkable - that Chrome would block online ads, Google's lifeblood - becomes reality on Thursday. That's when Chrome takes a significant step in the direction that hundreds of millions of us already have gone by installing ad blockers. Chrome stops far ..."

Washington's Birthday, Not Presidents Day

Washington's Birthday, Not Presidents Day - RF cafeDid you think that holiday celebrated on the 3rd Monday in February is "Presidents Day?" I assumed so given the prevalence of "Presidents Day." Well, it maybe so for some states, but the Office of Personnel Management's calendar still lists it as "Washington's Birthday." The White House put out a story about it on Monday. Better late than never.

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

U.S. National Science Foundation Clamps down on Misconduct

Netherlands Planning Massive Solar Energy Farm at Sea

Rise of Tech Giants May Be Bad News for Economy

Heaviest Element Could Have Fascinating Atomic and Nuclear Spectra

FCC Releases Report on Internet Access Services

Employees at Apple's New Campus Are Walking into the Glass Panes

Qualcomm Offers Previews of Its 5G Chipsets, Services

FY19 Defense Budget Calls for Big Boost for DIUx

Precision Experiments Reveal Gaps in van der Waals Theory

How Douglas Engelbart Invented the Future

How Douglas Engelbart Invented the Future - RF CafeThis article on computer mouse inventor Douglas Engelbart appeared in the January 2018 issue of Smithsonian magazine. I like the opening paragraph by author Valarie Landau, who happened upon a 1968 film while researching for a documentary. "On December 8, 1968, Douglas Engelbart sat in front of a crowd of 1,000 in San Francisco, ready to introduce networked computing to the world. Engelbart was no Steve Jobs. He was a shy engineer with no marketing background. His goal was to speak directly to other engineers, showing them that they could use computers in new ways to solve complex ..."

Gowanda Intros Shielded Surface Mount RF Inductors w/Higher Inductance

Gowanda Electronics Intros Shielded Surface Mount RF Inductors with Higher Inductance - RF CafeGowanda Electronics, a designer and manufacturer of precision electronic components for radio frequency and power applications, announces the expansion of its SML32S series of wirewound, shielded, molded RF surface mount inductors in the "1210" style. This expansion increases the number of individual parts in the series by more than 20% and broadens the inductance range by adding values from 120 µH to 470 µH. The expansion was done in order to address the market need for higher inductance shielded inductors in RF applications ...

Bliley Oscillators Featured in Erie's Local Newspaper

Bliley Oscillators Featured in Erie's Local Newspaper - RF CafeBliley Technologies has been manufacturing oscillators and crystals in Erie, Pennsylvania, since 1930. That's pretty amazing. Bliley's 64,000 square foot facility is only a few miles from my home. The Erie Times-News published a feature article on them in today's edition that has some photos from inside the plant. Note the stack of vintage-looking test equipment on the benches in the background (high-res). Despite its rather run-down appearance, Erie and the surrounding area is home a lot of high-tech industries including plastics, electronics, metal plating, industrial electrical equipment, and medical paraphernalia. The crime and cost of living are low here ...

Southwest Antennas Tri-Band Omni-Directional Antennas for L, S, C Band

Southwest Antennas Releases New Rugged Tri-Band Omni-Directional Antennas for L, S, and C Band Communication - RF CafeSouthwest Antennas, an industry leader in rugged RF / Microwave antenna and accessory products, has released a new line of tri-band antenna solutions designed to cover several popular sub-bands across the L, S, and C Bands. These omni-directional antennas are tuned for high performance operation in the following frequencies: 1.70 - 1.85, 2.2 - 2.5, and 4.4 - 5.0 GHz. For users who expect to utilize these bands or deploy multi-band radio systems, tri-band antennas can ...

FCC Suggested Changes to CBRS Band Rules Could Hinder Progress

FCC Suggested Changes to CBRS Band Rules Could Hinder Progress - RF Cafe"The Dynamic Spectrum Alliance (DSA) has approached the Federal Communications Commission (FCC) regarding its discontent over the proposed changes in the CBRS band rules. According to the DSA, the changes to the Priority Access License (PAL) and other rules, first requested by petitioners and now proposed by the Commission, are both unnecessary and counterproductive to enabling the fullest use of the Citizens Broadband Radio Service (CBRS) band. In its NPRM, the FCC proposed changes which included increasing the length of license terms from three ..."

ConductRF Low PIM RF Cables for DAS and Cellular

ConductRF Low PIM RF Cables for DAS and Cellular - RF CafeConductRF provides 3 styles of solution for DAS applications in Stadiums, Malls, Campuses, Hotels and more. Straight & R/A Low PIM Connectors are available for 7/16, N, SMA, QMA, 4.1/9.5 and 4.3/10 interfaces. We also offer Low PIM Adapters and PIM Test Cables for all these series. Utilizing ConductRF's new Low PIM Direct Solder Attachment Connectors, we provide high performance solutions for Low PIM interconnect including Straight, Right Angle, Bulkhead and Panel attachment. Performance better than -155dBc is validated through 100% testing ...

Author: Kirt Blattenberger on Google+ Author:
Kirt Blattenberger