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Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

• NextGen Nano-Satellites to Directly Communicate with IoT Devices

Amazon Doubles Profits, Pays $0 in Federal Income Taxes - Again!

Navy Secure SATCOM for Shipboard Communications and Computer Networks

• One Man's Quest to Prove Vermont Has Terrible Cell Service

• Here Are the Top 50 Streamed Talk Show Hosts

• 5G and Massive MIMO Radio Shipments to Hit 100M Units by 2021

Politics Play a Role in 5G Outlook

New York's Excessive Antenna Application Fees Violate Reasonable Accommodations

Light Speeds up 3D Printing of Plastic 100x

RF Cafe Forums Archive

Thousands of old forum topics - still useful.

Mac's Radio Service Shop: Unusual New Equipment

Mac's Radio Service Shop: Unusual New EquipmentJohn T. Frye's monthly "Mac's Radio Service Shop" techno-drama, written in story form - was usually an incognito lesson on circuit functionality or troubleshooting, how to deal with customers, industry regulations and news, or an introduction to new components and equipment. As the "Unusual New Equipment" title suggests, this time Mac described a few new items added to the service shop to aid in their work. Often when reading one of the episodes, I do a Google search on specific components or equipment mentioned in the article. He describes a special-purpose CRT (Sylvania's new 5AXP4 Television Receiver Check Tube) that could be used universally for troubleshooting in place of a wide variety of installed picture tubes. I found one for sale on eBay for $39.95. There is not much you cannot find on eBay if you watch long enough ...

ConductRF Precision D38999 RF & Mixed Signal Cables

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 ...

Jean Shepherd on Getting His Class A Amateur Radio License

Jean Shepherd on Getting His Class A Amateur Radio License - RF CafeNot very long ago I mentioned Jean Shepherd (original assignee of W9QWN and later K2ORS call signs) as being one of my favorite old-time radio broadcasters (1960s-1970s). Jean was famous for recounting stories of his own life and for reporting news of the time in a way that could hold you in rapt attention from beginning to end. His humor, wit, and command of the English language was acknowledged by his contemporaries. If you listen to enough of his broadcasts you will notice the frequent mention of electronics and his experiences as a licensed amateur radio operator beginning at a tender young age. Just recently I listened to him recount his first day in high school when a SNAFU in the computer-generated (must have been a UNIVAC) class schedule mistakenly had him reporting to the girls' swimming pool ...

R&S App Note: Group Delay Measurements with Signal and SpecAn

Rohde & Schwarz App Note: Group Delay Measurements with Signal and Spectrum Analyzers - RF CafeRohde & Schwarz USA (R&S USA) has published an application note titled, "Group Delay Measurements with Signal and Spectrum Analyzers." The available bandwidth of RF channels are often limited by the bandpass characteristic of filters, amplifiers and mixers. Detecting amplitude flatness and phase distortion is crucial in characterizing the quality of a transmission channel. The amplitude flatness within the used bandwidth may have an influence on the signal quality. Knowledge about phase distortion is essential to maintain low bit error rates in data transmissions and VNAs (Vector Network Analyzer) commonly perform amplitude flatness and phase distortion measurements. Phase distortions in a transmission channel are determined using group delay measurements, they must be as low as possible to maintain good signal quality ...

New Type of Magnet Discovered

New Type of Magnet Discovered - RF cafe"A team of scientists has discovered the first robust example of a new type of magnet - one that holds promise for enhancing the performance of data storage technologies. This 'singlet-based' magnet differs from conventional magnets, in which small magnetic constituents align with one another to create a strong magnetic field. By contrast, the newly uncovered singlet-based magnet has fields that pop in and out of existence, resulting in an unstable force - but also one that potentially has more flexibility than conventional counterparts. 'There's a great deal of research these days into the use of magnets and magnetism to improve data storage technologies,' explains Andrew ..."

Many Thanks to Bittele Electronics for Continued Support!

Bittele Electronics PCB Fabrication - RF CafeSince 2003, Bittele Electronics has consistently provided low-volume, electronic contract manufacturing (ECM) and turnkey PCB assembly services. It specializes in board level turnkey PCB assembly for design engineers needing low volume or prototype multi-layer printed circuit boards. Free Passive Components: Bittele Electronics is taking one further step in its commitment of offering the best service to clients of its PCB assembly business. Bittele is now offering common passive components to its clients FREE of Charge ...

Howard W. Sams and Co., Inc. Photofacts

Howard W. Sams and Co., Inc. Photofact, May 1956 Radio & Television News - RF CafeHaving recently struggled a little with re-stringing the dial cord on a vintage Realistic (Radio Shack) Patrolman−50 Radio, it really became apparent why the Sams Photofact Folders were of such value to electronics servicemen. Unlike the tangled mess of dial cord shown in the ad, I had the advantage of being able to carefully open the chassis and photograph the routing and wrapping of the broken dial cord around pulleys and shafts. Even so, a lack of experience required some trial and error to get the tensioning correct. No doubt many unqualified radio owners attempted to fix their own broken dial cords prior to breaking down and committing to spending a few bucks to have a pro do it correctly. The tight quarters in my portable radio had me using tweezers to do some of the routing ...

5G MMIC PA Design Webinar Features NI AWR Software

5G MMIC PA Design Webinar Features NI AWR Software  - RF CafeOn March 6, 2019, at 11 a.m. ET, NI AWR software will be featured in an upcoming webinar titled, "GaN Electrothermal Modeling for 5G MMIC Power Amplifier Designs." Featured is a 0.15 micrometer (μm) gallium nitride (GaN) process for 5G monolithic microwave integrated circuit (MMIC) power amplifiers (PAs). Presented by Eric Leclerc, field marketing manager at United Monolithic Semiconductors (UMS), the webinar examines the characterization of a short gate-length process for millimeter wave (mmWave) applications up to 40 GHz. The models developed by UMS are being organized into a process design kit (PDK) for the NI AWR Design Environment platform, specifically Microwave Office circuit design software, for release later this year. The resulting PDK will support the development of MMICs targeting mmWave telecommunications ...

Norman Rockwell Paintings with Radio Themes

Norman Rockwell Paintings with Radio Themes - RF CafeMy mother loved Norman Rockwell paintings for their ability to get to the heart of Americana. She was an avid collector of books on Rockwell and decorated plates for display - as avid as one can be on my newspaper classified ad manager father's feeble salary, anyway. I, too, have a great appreciation for Rockwell's great talent to choose his subject matter and models and to, when fitting, include a nearly photographic level of detail within. The Saturday Evening Post magazine featured many of his works spanning from 1916 until 1971 - from the middle of World War I and on through World War II, Korea, and Vietnam. Summer, spring, fall, and winter; Christmas, Easter, Veteran's Day, President's Day, Mother's Day, New Year's, and other annual events; experiences of love, happiness, joy, surprise, sadness, and a host of other emotions ...

Saelig Intros D20305G RF Downconverter to Extend Range of SpecAn

Saelig Intros D20305G RF Downconverter to Extend the Range of Existing Spectrum Analyzers - RF CafeSaelig Company announces the compact ThinkRF D2030 RF Downconverter, engineered to work seamlessly with existing spectrum analysis equipment by down-converting RF signals from the 27-30 GHz frequency bands down to an intermediate frequency (IF) of 3.55 GHz or 5.6 GHz. The D2030 RF Downconverter works with existing test equipment, RF signal detectors, and interfaces, minimizing user training requirements, and enabling these products to offer 5G analysis capabilities. This RF downconverter features 10 MHz input and output clock references for multi-unit synchronization. As 5G mobile and wireless communication technologies continue to draw on wider bandwidths and higher frequencies, users can run multiple D2030 ...

Si-Based Electronically Steered Ku-Band Antenna Array for Mobile

Si-Based Electronically Steered Ku-Band Antenna Array for Mobile - RF Cafe"SatixFy UK Limited introduced the world’s first ESMA (Electronically Steered Multi-Beam Array) Ku-band 256 element array antenna at this week's SmallSat Symposium 2019 in Mountain View, CA. Utilizing the company's fully digital beam forming technology, the new antenna array is being demonstrated working in an Antenna Micro Test Range to show multi-beam capabilities, antenna patterns and other performance parameters. The ESMA antenna can serve both as a stand-alone IoT terminal or a building block for a larger sized antenna and is currently available in 11-12 GHz receive and 13.75-14.5 GHz transmit frequencies. SatixFy is in the final stages of developing a complete terminal with an integrated SatixFy modem ..."

Windfreak Technologies: USB-Powered RF Synthesizers, Mixers

Windfreak TechnologiesWindfreak Technologies designs, manufactures, tests and sells high value USB powered and controlled radio frequency products such as RF signal generators, RF synthesizers, RF power detectors, mixers, up / downconverters. Since the conception of WFT, we have introduced products that have been purchased by a wide range of customers, from hobbyists to education facilities to government agencies. Worldwide customers include Europe, Australia, and Asia. Please contact Windfreak today to learn how they might help you with your current project ...

Is Stratovision the Answer?

Is Stratovision the Answer?, January 1950 Radio & Television News - RF Cafe'Stratovision' sounds about as serious as 'Wonkavision,' but unlike the candy maker's fictional machine that transported chocolate bars across the room, Stratovision was in fact a serious proposal. It was an early form of satellite television. Since orbiting communications satellites would not be practical for another decade, Westinghouse devised a system in 1945 using aircraft flying at high altitude to relay television signals. Engineers calculated that 14 airplanes circling at 25,000 feet could provide coverage to 78% of the country. By 1950 they had a working system, but needless to say (because nobody has ever heard of it... except you, now), the concept ultimately did not pan out. It was not because the system failed to work as designed, but because there was not enough demand ...

Modelithics Releases the Complete Library v19.0 for Keysight ADS

Modelithics Releases the COMPLETE Library v19.0 for Keysight Advanced Design System - RF CafeModelithics® has released version 19.0 of the COMPLETE Library for Keysight Advanced Design System. Version 19.0 is compatible with the latest ADS release, ADS 2019, and adds 52 new models for passive and active components from multiple leading vendors. The Modelithics COMPLETE Library™ is a collection of highly accurate scalable simulation models for many passive component families and active devices. Advanced model features include substrate scaling, pad scaling and part value scaling for LCR component series, and bias-dependence and temperature effects for active devices. All models are validated with precision broadband measurements and come with a detailed model datasheet ...

Evolution of the Phonograph

Evolution of the Phonograph, May 1956 Radio & Television News - RF CafeWhile not a second-hand store junkie, I do like to occasionally make the rounds of the local Salvation Army, Goodwill, and other independent shops to see what kind of relics are donated. Since eBay, Etsy, and their kind have gained immensely in popularity, it is getting harder to find anything useful other than clothes and kitchen wares. A few months ago Goodwill had a 1910s vintage cabinet -style Edison disc phonograph (as opposed to wax cylinder) that was in very good condition, complete with a handful of styli and a couple old records. The original finish over smooth mahogany and burl veneers had only a few scratches and could easily be polished to look practically new. The metal hardware could have stood a fresh coat of black paint due to nearly a century of oxidation. Even the original nomenclature plate looked factory-new, and a clearly legible paper plaque ...

Z-Communications Intros Extremely Low Noise X-Band PLO

Z-Communications Intros Extremely Low Noise X-Band PLO - RF CafeZ-Communications announces a new RoHS compliant fixed frequency phase locked loop model SFS9280C-LF operating in the X-band. The SFS9280C-LF is a plug and play PLO allowing for quick integration and designed to produce a fixed signal at 9280 MHz when utilized with an external 10 MHz reference oscillator. This simple to use PLO features a typical phase noise of -80 dBc/Hz, -100 dBc/Hz, and -120 dBc/Hz at the 1 kHz, 10 kHz and 100 kHz offsets, respectively. The SFS9280C-LF is designed to deliver an output power of 0۬±3 dBm while operating off a VCO voltage supply of 5 Vdc and drawing 90 mA and a phase locked loop voltage of 3 Vdc while drawing 11 mA. This unmatched product features a typical harmonic suppression of -30 dBc and spurious suppression of -65 dB ...

How Can Chiral Helices Create a Spin Current?

How Can Chiral Helices Create a Spin Current? - RF Cafe"When it comes to realizing low-power electronic devices, spintronics looks promising. However, to generate a suitable spin current, you need a relatively large magnet. An alternative method that uses a special type of molecule has been proposed, but the big question is: does it work? Researchers have constructed a theoretical model which describes how to put this new method to the test. When it comes to realizing low-power electronic devices, spintronics looks promising. Spin is a quantum-mechanical property of electrons that can best be imagined as electrons spinning around their own axis, causing them to behave like small compass needles. A current of electron spins could be used in electronic devices. However, to generate a suitable spin current ..."

San Francisco Circuits: PCB Fabrications & Assembly Service

San Francisco CircuitsSF Circuits' specialty is in the complex, advanced technology of PCB fabrication and assembly, producing high quality multi-layered PCBs from elaborate layouts. With them, you receive unparalleled technical expertise at competitive prices as well as the most progressive solutions available. Their customers request PCB production that is outside the capabilities of normal circuit board providers. Please take a moment to visit San Francisco Circuits today ... 

Bell Telephone Laboratories - Circular Waveguide Invention

Bell Telephone Laboratories, June 1955 Radio & Television News - RF CafeAccording to this full-page advertisement in the June 1955 issue of Radio & Television News magazine, Bell Telephone Laboratories was responsible for designing and fielding "waveguide pipe," aka flexible circular waveguides. According to other historical sources, both George Southworth of Bell Telephone Laboratories and Wilmer Barrow of the Massachusetts Institute of Technology (M.I.T.) independently and simultaneously developed circular waveguide, but the early devices were rigid pipe rather than being fabricated from tightly wrapped, insulated wire that permitted it to be bent rather than requiring separate corner and offset pieces. Insertion loss and VSWR is typically not as good as with rigid waveguide, but the ease of installation in many situations justifies the poorer electrical performance. Bell Telephone Laboratories was responsible ...

HAM RADIO 2019 Set for June 21-23

HAM RADIO 2019 Set for June 21-23 - RF CafeHAM RADIO 2019 and the 70th Lake Constance Convention, both organized by the Deutscher Amateur Radio Club (DARC), Germany’s International Amateur Radio Union (IARU) member-society, will take Friday, June 21, until Sunday, June 23, in Friedrichshafen on Lake Constance. "We very much hope that, again, many representatives of the IARU member-societies will be able to attend HAM RADIO," said DARC Secretary for International Affairs Thomas Wrede, DF2OO. An informal meeting for representatives of IARU member-societies will take place on June 21. Youth days and a ham rally will take place on Friday and Saturday ...

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About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2024
    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 ...

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