Thank you for visiting RF Cafe! Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes Wireless System Designer RF Stencils for Visio Shapes for Word Search RF Cafe Sitemap Advertising Facebook RF Cafe Homepage Thank you for visiting RF Cafe!
Homepage Archive - December 2017 (page 2)

These archive pages are provided in order to make it easier for you to find items that you remember seeing on the RF Cafe homepage. Of course probably the easiest way to find anything on the website is to use the "Search RF Cafe" box at the top of every page.

Homepage Archive Pages

2017:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2016:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2015:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2014:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2013:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec

See Page 1 | 2 | 3 of the December 2017 homepage archives.

Friday 15

Fairview Microwave Waveguide to Coax Adapters for 1.7 GHz to 110 GHz

Fairview Microwave Releases Waveguide to Coax Adapters Operating in Frequency Range of 1.7 GHz to 110 GHz - RF CafeFairview Microwave, a supplier of on-demand microwave and RF components, has launched a new series of waveguide to coax adapters that cover a frequency range of 1.7 GHz to 110 GHz in 22 waveguide bands. Typical applications include test benches, instrumentation, high efficiency RF/Microwave transmission, MILCOM, SATCOM, radar and telecom. Fairview's new line of waveguide to coax adapters consists of 77 models in sizes of WR-10 to WR-430. These adapters are offered in a wide selection of waveguide flanges, sizes and materials. They support 10 ...

Lenny & the Squigtones - "The Jolliest Fat Man"

Lenny & the Squigtones (The Jolliest Fat Man) - RF Cafe Video for EngineersMost people who were around in the 1970s remember the sitcom "Laverne & Shirley." It was popular as a part of the whole 1950s renaissance that was happening with shows like "Happy Days," "Grease," "American Graffiti," et al, that captured the attention of the parents of we teenagers as well as us. I was being held against my will at Southern Senior High School at the time, and many of the kids adopted a "greaser" lifestyle that included cigarette packs rolled up in t-shirt sleeves and Brylcreem in the hair (mainly just the guys), leather jackets and Keds high-top sneakers (guys and gals), and poodle skirts and saddle Oxford shoes (mainly just the gals). Two weirdo characters, Lenny and Squiggy, made cameo ...

IEEE: Patent Power 2017

IEEE: Patent Power 2017 - RF CafeIEEE has published its "Patent Power 2017" review of the world's companies' patent portfolios and the influence wielded thereby. The web page includes an interactive table and chart that includes 18 industry scorecards with the top 20 companies in each sector. The thumbnail shown here is with everyone involved, but you can filter out non-relevant (per your definition) industries. Circle size indicated relative patent power for a given country. The U.S. still dominates overall. Apple is the figurative 800-lb. gorilla of electronics patents. Honeywell "owns" aerospace and defense (which surprises me). Intel leads in semiconductors. MIT rules in university patents. Take a look ...

SES Says FCC Should Make C-Band Registration Easier, More Affordable

SES Says FCC Should Make C-Band Registration Easier, More Affordable - RF Cafe"C-band satellite service provider SES recently told the FCC that if it wants a more accurate database of satellite earth stations, it should streamline the registration framework to make it simpler and more affordable. As revealed in a Dec. 7 ex parte filing (PDF), SES met with FCC staff on Dec. 5 to discuss midband spectrum and the history of C-band satellite. SES emphasized the benefit of C-band satellite capacity not only to cable operators but to other media industry members as well, explaining that virtually all of the video and audio programming ..."

Thursday 14

Electromagnetic Water Cloak Eliminates Drag and Wake

Electromagnetic Water Cloak Eliminates Drag and Wake - RF Cafe"Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while simultaneously helping it avoid detection. The idea originated at Duke University in 2011 when researchers outlined the general concept. By matching the acceleration of the surrounding water to an object's movement, it would theoretically be possible to greatly increase its propulsion efficiency while leaving the ..."

NI/AWR Example Highlights Impedance Matching of a 60-GHz Printed Antenna

NI/AWR's New Application Example Highlights Impedance Matching of a 60-GHz Printed Antenna - RF CafeImpedance matching of high-frequency components is a key part of antenna design that ensures maximum transfer of power between the antenna and the transmitter / receiver circuitry. Antennas can be tuned to resonate at the desired frequencies much more quickly and efficiently by first designing a matching circuit rather than by making modifications to the antenna's physical dimensions. A new application example describes a unique design flow using NI AWR Design Environment Microwave ...

Test Equipment Scene: VOM's, VTVM's and TVM's

Test Equipment Scene: VOM's, VTVM's and TVM's, March 1972 Popular Electronics - RF CafeFor most needs to measure voltage, current, and resistance, modern users of test equipment do not need to give much thought to the electrical characteristics of the instrument being used. Other than setting the function switch to the proper position (ohms, volts, amps, milliamps, etc.) and not exceeding the safe input limits, measurement accuracy can usually be assumed to be good to within ±2 to ±5 of the least significant displayed digit. I.e., if the digital display shows 10.000, then the actual value is likely in the range of 9.995 to 10.005. Autoranging even removes ...

Boeing to Install Digital Electronics in E-3 Sentry Cockpit Avionics

Boeing to Install Digital Electronics in E-3 Sentry Cockpit Avionics - RF Cafe"Military avionics experts at the Boeing Co. are moving forward with a project to upgrade the cockpits of U.S. Air Force E-3 Sentry radar aircraft with modern commercially available, digital electronics under terms of a $46.3M order announced Thursday. Officials of the Air Force Life Cycle Management Center at Hanscom Air Force Base, are asking the Boeing Defense, Space & Security segment in Oklahoma City to continue work on the E-3 Airborne Warning and Control System (AWACS) Diminishing Manufacturing Sources ..."

Modelithics Co-Founder Dr. Tom Weller Named IEEE Fellow

Modelithics Co-Founder Dr. Tom Weller Named IEEE Fellow - RF CafeModelithics is pleased to share the news and congratulate Dr. Thomas Weller, the company's co-founder, on being named IEEE Fellow by the Institute of Electrical and Electronics Engineers. This high designation is given by the IEEE Board of Directors to persons having a history of significant accomplishments in the fields of electrical engineering. Dr. Weller has been recognized for his extensive contributions in the area of advanced RF and microwave modeling techniques for surface ...

On-Chip Metal-to-Metal Tunneling Makes Light Without Lasers

On-Chip Metal-to-Metal Tunnelling Makes Light Without Lasers - RF Cafe"Light made on CMOS chips using quantum tunneling could be used for optical interconnect and chemical sensing, according to physicists at King's College London. Kings College gold nano-rod tunneling The technique involves constructing a ~1 nm gap between two metal electrodes (see diagram), and then using a potential difference to promote electron tunneling across the gap. This tunneling occurs in two forms: elastic and inelastic, King's physicist Dr Pan Wang told ..."

Wednesday 13

How to Tame Electromagnetic Interference in Fabs and Beyond

How to Tame Electromagnetic Interference in Fabs and Beyond - RF Cafe"Electromagnetic interference (EMI) is an increasingly important topic across the global electronics manufacturing supply chain. Progressively smaller geometries of ICs, lower supply voltages, and higher data rates all make devices and processes more vulnerable to EMI. Electrical noise, EMI-induced signal generated by equipment, and factors such as power line transients affect manufacturing processes, from wafer handling to wire bonding to PCB assembly and test, causing millions of dollars in losses ..."

4 Facts About Magnets for Electric Vehicles

4 Facts About Magnets for Electric Vehicles - RF Cafe"There are four main types of magnets: ceramic (ferrite), AlNiCo, Samarium Cobalt (SmCo), and Neodymium (NdFeB). The latter is one of the most commonly used in motors for hybrids vehicles and EVs. Neodymium magnets have higher remanence, along with much higher coercivity and energy production, but often lower Curie temperature than other types. Special neodymium magnet alloys that include terbium and dysprosium have been developed with higher Curie ..."

Mac's Service Shop: TVI from the Victim's Viewpoint

Mac's Service Shop: TVI from the Victim's Viewpoint, March 1972 Popular Electronics - RF CafeWhen I read this installment of Mac's Service Shop, in Popular Electronics magazine, the first thing that came to mind was my own experience with television interference (TVI) when I was a kid. In that case, the transmitter of my radio control system for a model airplane was the culprit. The frequencies and channels are almost exactly the same as reported in this infodrama. In the 1970s, citizen band (CB) radios operated in the 27 MHz realm, as did my R/C transmitter. During summer vacation from junior high and high school, I would run my model airplanes up down the street in front of my house, getting up just enough speed to lift off and then immediately ...

QuinStar Power Amplifiers Boost Radar, Communications, Defense Systems

Quinstar Power Amplifiers Boost Radar, Communications, Defense Systems - RF CafeNASA's Jet Propulsion Laboratory issued the following notice from their NASA Spinoff Database: Power Amplifiers Boost Radar, Communications, Defense Systems. As a subcontractor under an SBIR contract from the Jet Propulsion Laboratory, QuinStar Technology Inc. of Torrance, California, developed a solid-state power amplifier of unprecedented efficiency. While most comparable devices lose 20% of their amplified energy when their signals recombine, QuinStar's lose 8%. The solid-state technology ...

Beam-Switching Successfully Tested on Predator Drone

Beam-Switching Successfully Tested on Predator Drone - RF Cafe"Two satellite beams (or more) are better than one when it comes to data transfer and anti-jamming measures between satellites and drones. At least that's what last month's first successful test of beam-switching technology on an MQ-9 Predator drone seemed to show. Over the course of the testing, the drone flew 1,075 nautical miles and was able to switch smoothly between two spot beams multiple times throughout the trial. While traditional wide-beam satellites use one beam to cover thousands of miles, the satellites ..."

Tuesday 12

High-Density PC Boards

High-Density PC Boards, October 1969 Electronics World - RF CafeYou will probably chuckle at the sight of the printed circuit board being an example used in an article about high density PCB production. However, in 1969 it was heralded as leading edge technology. Remember, though, that surface mount components the size of a grain of salt were unheard of so such a board probably represents a bunch of leaded components being closely packed together with the biggest concern for density being heating / cooling issues. Part of the big deal with this board, when you read the article, is that it is one of eight that were produced on the same substrate and then singulated ...

Cuprate Stripes May Link to Ultrathin Semiconductor Use 'Rust' as Insulator

Ultrathin Semiconductor Use 'Rust' as Insulator - RF Cafe"Chip makers appreciate what most consumers never knew: silicon's virtues include the fact that it 'rusts' in a way that insulates its tiny circuitry. Two new ultrathin materials share that trait and outdo silicon in other ways that make them promising materials for electronics of the future. Facebook Twitter Email By Andrew Myers The next generation of feature-filled and energy-efficient electronics will require computer chips just a few atoms thick. For all its positive attributes, trusty ...

single note, red - RF Cafedouble note, green - RF Cafe It's Beginning to Look a Lot Like [a White] Christmas double note, red - RF Cafesingle note, green - RF Cafe in Erie!

Snow in Erie, Pennsylvania, December 12, 2017 - RF CafeCall me nuts, but I have always loved a white Christmas. That's why most of my life has been spent in northern climes. Judging by the heap on the bird feeder, about 6-8" has fallen so far, and then there's another 6-8" due by tomorrow evening. The pic is from a Wansview 720p webcam (~$40, free access from anywhere) looking out my front window. There's one in the basement, too, for monitoring the homestead when gone. I installed a couple of these webcams at my daughter's house, too - very simple to set up. Now we can see her North Carolina horse farm goings on anytime.

Notable Tech Quote: Werner von Siemens 

Werner von Siemens Notable Tech Quote - RF Cafe"Ideas alone have little worth. The value of an invention lies in its practical implementation." - Werner von Siemens, 1865. The unit of electrical conductance is named after him.

Terminal Radio Corp. Christmas and New Year Greeting

Terminal Radio Corp. Christmas and New Year Greeting, January 1941 QST - RF CafeOther than today's QST magazine being a larger format and being printed in full color, there is not much difference fundamentally between the amount of Christmas-themed company advertisements now and half a century ago. Those from the last century were more likely to incorporate a religious message in addition to or instead of a secular message to their customers. Terminal Radio Corporation was located in midtown Manhattan. Google Maps can find West 45th Street and it can find Cortlandt Street, but they evidently no ...

Pentagon Spending More on Emerging Tech

Pentagon Spending More on Emerging Tech - RF Cafe"The Department of Defense spent $7.4B in fiscal year 2017 on cloud computing, big data and artificial intelligence technologies, according to a recent report by public-sector contracting analytics firm Govini. That represents a 32% increase since 2012, with more specific technologies like quantum computing, virtual reality and machine learning seeing some of the bigger boosts in investment. While cloud, AI and big data all saw spending jump over the past five years, AI accounted for the bulk of the increase in spending ..."

Monday 11

Army Developing Lasers That Pierce Fog, Dust to Destroy Targets

Army Developing Lasers That Pierce Fog, Dust to Destroy Targets - RF Cafe"A lot of people think that high-energy lasers, or HELs, can't penetrate fog, rain and dust, said Thomas Webber, director of the Directed Energy Division's Technical Center, U.S. Army Space and Missile Defense Command. That's just plain wrong. The key to making HELs work in poor atmospheric conditions is something called "adaptive optics," he said, adding that the Army is continuing to make more and more improvements on its adaptive optics system ..."

New Invention Could Lead to Novel Terahertz Light Sources

New Invention Could Lead to Novel Terahertz Light Sources - RF Cafe"A new device could open new avenues for the generation of high-frequency radiation with applications in science, radar, communications, security and medical imaging. Ever since the discovery of X-rays in 1895, their ability to reveal things hidden to the human eye has created endless opportunities. But X-rays by far aren't the only option to see the world with different eyes. Researchers hope to make better use of a different form of light, called terahertz radiation ..."

Anatomy of a Lightning Bolt

Anatomy of a Lightning Bolt, March 1973 Popular Electronics - RF CafeMankind has been fascinated with -and scared of - lightning since the dawn of civilization. It's incredible power has been the cause of much destruction and loss of life. Benjamin Franklin famously proved that lightning is in fact a form of electrostatic discharge. He exploited that knowledge to invent grounded lightning rods for tall buildings, thereby nearly totally halting the lightning-caused fire epidemic in Philadelphia and other cities. Much investigation and implementation of lightning discharge mitigation schemes has occurred to safeguard against catastrophic events. Ultimately, though, says author David Heiserman, 'Lightning has ..."

Identifying and Isolating Signals Using Radio Frequency Photonics

Radio Frequency Photonics - RF CafeAn article titled, "Identifying and Isolating Signals Using Radio Frequency Photonics," appeared in the December 2017 issue of Aerospace & Defense Technology magazine. I have not delved much into RF photonics, but evidently the science is gaining popularity, especially as communications shifts to higher and higher frequencies. "Review of Radio Frequency Photonics Basics," also authored by Preetpaul Devgan, contains a lot of good info ...

Thanks to QuinStar Technology for Their Support

QuinStar Technology mm-Wave Products - RF CafeQuinStar Technology designs and manufactures mm-wave products for communication, scientific, and test applications along with providing microelectronic assembly, rapid prototyping, and mass customization. Amplifiers, Oscillators, Switches, Attenuators, Circulators, Isolators, Filters, Waveguide, Antennas, Phase Shifters, Transceivers, Mixers, Detectors. QuinStar specializes in cryogenic amplifiers, circulators, and isolators. Please visit QuinStar today to see how they can help your project ...

WiDeo: A Motion Tracing Camera Using WiFi Signals

WiDeo: A Motion Tracing Camera Using WiFi Signals - RF Cafe"WiDeo in operation: The compact WiFi AP in the study integrates WiDeo's motion tracing functionality, and can reconstruct the hand movement made by humans in the living room. WiDeo traces motion even though the AP is separated by a wall and does not have a LOS path to the humans, and doesn't require that the humans have any RF devices on them. WiDeo has broad applications such as security, navigation, search and rescue, and people monitoring ..."

















Anatech Electronics' December Newsletter

Anatech Electronics Newsletter for December 2017 - RF CafeAnatech Electronics, a manufacturer of RF and microwave filters, has published its December newsletter. In it, Sam Benzacar writes his annual "RF and Microwave: The Year in Review." He addresses the emerging technologies that are actually making 5G a reality in spite of the seemingly insurmountable obstacles presented by the realities of physics. We've been there before with other newfangled technologies; i.e., Bluetooth. Sam has a very quotable line regarding the driverless vehicle craze, "And for laughs, there's always driverless vehicles, a goal driven (it seems to me) by people ...

Beads Block Noise

Beads Block Noise, April 1969 Electronics World - RF CafeThe April 1969 issue of Electronics World included a large number of articles on the topic of filter design and use. Included were titles such as "LC Filters," "Practical Operating Limits for Filters," "Filters for Microwave," " Crystal Filters," and others were contributed by experts in the field from industry and academia. This article on the use of ferrite beads for blocking RF signals is more of a sidebar note than an article, but it's still worthy of inclusion. Ferrite beads and toroids are still widely employed for stopping radio frequency interference (RFI) on everything from AC power cords to millimeter ...















2D Material Integrates Digital Logic and Memory into One Chip

2D Material Integrates Digital Logic and Memory into One Chip - RF Cafe"Researchers at Stanford University have demonstrated that field-effect transistors made from a single layer of molybdenum disulfide (MoS2) can successfully drive resistive random access memory. The results, which were reported last week at the IEEE International Electron Devices Meeting, represent a key milestone for the blending of memory with logic in a monolithic 3D integrated chip. The chip the Stanford researchers developed is known as a 1-transistor-1-resistor memory cell ..."

3-D Printed Objects Connect to WiFi Minus the Electronics

3-D Printed Objects Connect to WiFi Minus the Electronics - RF Cafe"Researchers from the University of Washington have successfully created a new breed of 3-D printed objects. These plastic objects and sensors are capable of collecting all sorts of data, as well as communicating directly with other devices on WiFi. Thanks to models the team is making available to the public, users will be soon be able to create 3-D objects of their own. Although these devices will be made from commercially available plastics, they will have one particularly unique feature: they will be able to wirelessly communicate with other smart devices ..."



















RF Cafe Software

   Wireless System Designer - RF Cafe
Wireless System Designer

RF & EE Symbols Word
RF Stencils for Visio
Calculator Workbook
RF Workbench
Smith Chartâ„¢ for Visio
Smith Chartâ„¢ for Excel

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
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 ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !