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Homepage Archive - May 2017 (page 3)

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

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

Friday 2

Thursday 1

Wednesday 31

Pick up Those Profits from Portables

Pick up Those Profits from Portables, June 1951 Radio & Television News - RF CafeRadio & Television News magazine was not normally in the practice of instructing retail outlet salesmen and service shop owners in techniques for hacking their wares, but this article in the June 1951 issue of Radio & Television News is an exception. In it, A.W. Bernsohn, Managing Director of the National Appliance & Radio Dealers Association, extensively outlines many tried and true schemes for use in convincing customers that they really do need a new, reconditioned, or rental portable radio for those lazy, hazy, crazy days of summer*. Those were the days long before iPods, Walkmans, and smartphones, when 'portable' meant maybe ...

Notable Quote:  Jamie Davies

Notable Quote: Jamie Davies - RF Cafe"...timeframes are the enemy, they’ll figure out if you're behind schedule if you are too specific." - Jamie Davies, in a telecoms.com article titled "Euro 5G Consortium Releases Roadmap with No Direction." Thanks to RF Cafe visitor Bob Davis for the tip ...

Metal Bismuth 'Memory' Liquid State Electrical and Material Potential

Metal Bismuth Has 'Memory' of Liquid State, Giving It New Electrical and Material Potential - RF Cafe"Researchers have made a new discovery about metal bismuth that shows potential for the semimetals unprecedented use in electrical engineering and the development of new materials, they said. Researchers at the Carnegie Institution of Washington used high pressure and temperature to reveal what they refer to as 'structural memory' in samples of the metal bismuth, which allows it to 'remember' its liquid structure even when it is in solid form, said Guoyin Shen, a researcher in the Geophysical Laboratory at the institute who led the project ...

LabVIEW NXG Is a Back to Basics Release

LabVIEW NXG Is a Back to Basics Release - RF CafeNational Instruments (NI) has released LabVIEW NXG as a return to more codeless development platform, as it began many moons ago. I used the DOS versions in the 1990s. Maybe NXG stands for 'next generation,' but more appropriately it would be 'native generation.' "LabVIEW NXG offers engineering workflows for interactively acquiring, analyzing, and visualizing data sets. Combined with built-in, drag-and-drop engineering user interface development and inherent data exploration, LabVIEW NXG is the ideal tool to turn data collection ..."

Gary Breed's (K9AY) ARRL 160 Meter Contest Report in QST

Gary Breed & Kirt Blattenberger - RF CafeRemember Gary Breed (left, w/me, right, at IMS 2009), editor of RF Design and High Frequency Electronics magazine? He is a very nice guy and an avid Ham radio operator (K9AY - weight=56). Gary has an article in the June 2017 issue of QST magazine titled "2016 ARRL 160 Meter Contest Results." A search on his name returns many instances of his writings. In 2001, Gary created AY Technologies to market his famous K9AY Loop antenna.

Quantum Light Emission from 2D Materials Pin-Pointed

Quantum Light Emission from 2D Materials Pin-Pointed  - RF Cafe"Atomically thin layered transition metal dichalcogenides such as tungsten diselenide or tungsten disulphide have been reported to emit single photons, though from seemingly random locations which makes the study of the actual sources of emission rather difficult, not knowing precisely where to look for quantum light emitters. So far, the quantum emitters (QEs) had been assigned to both defects and strain gradients, mostly unwanted and unpredictable ..."

Tuesday 30

Anatech Intros Notch, Bandpass, and Multiplexer Filters

Anatech Electronics Intros Notch, Bandpass, and Multiplexer Filters - RF CafeAnatech has introduced 3 new products for your convenience: a 10 MHz crystal notch filter with SMA connectors, a 2412 MHz WiFi cavity bandpass filter with SMA connectors, and a 10-900 MHz LC multiplexer with N connectors. Anatech Electronics offers the industry's largest portfolio of high-performance standard and customized RF and microwave filters and filter-related products for military, commercial, aerospace and defense, and industrial applications up to ...

U.S. Air Force Budget Boosts Space Tech

U.S. Air Force Budget Boosts Space Tech - RF Cafe"Space technology is one of the military's fastest growing sectors, and that is reflected in the U.S. Air Force budget request for fiscal year 2018. The Air Force controls about 90 percent of the military's space programs. The service is seeking a 20 percent increase for space systems, requesting $7.7B in the 2018 federal budget the Trump administration sent to Congress this week. The space request includes $4.3B for research and development and $3.4B for procurement. Demands for new and improved ..."

6 Vintage Vacuum Tub Radio Schematics & PLs Added

6 Vintage Vacuum Tub Radio Schematics & PLs Added - RF CafeThese six 'drive-by' schematics and parts lists for vintage vacuum tube radios appeared in a 1948 issue of Radio News. I refer to them as 'drive-by' because there was no description or maintenance verbiage provided as was more often done. I posted hyperlinked thumbnails of models for which I could locate photos.

- Admiral Model 7C64
- Arvin Model 182TFM
- Belmont Model 6D121
- Crosley Model 58TK
- General Electric Models 60, 62
- Westinghouse Model H-165

Teledyne Defence & Space to Supply Thousands of Filters and Diplexers

Teledyne Defence & Space Awarded Contract to Supply Thousands of Filters and Diplexers for Space Payloads - RF CafeTeledyne Defence & Space, a business unit of Teledyne Microwave Solutions, announced today that it has been selected to manufacture over 5,000 Filters and Diplexers to support a space payload application for a large satellite program. In recognition of the company's expanding portfolio of space-based products and capabilities, last year the former Teledyne Defence changed its corporate name to Teledyne Defence & Space (TDS). This new contract award underscores the commitment TDS is bringing to space market ...

Amateur Radio Panel Set during IEEE IMS 2017

Amateur Radio Panel Set during IEEE International Microwave Symposium - RF Cafe"Aloha! Amateur Radio-related activities will be part of the IEEE International Microwave Symposium (IMS) June 4-9 in Honolulu, Hawaii. IMS is sponsored by the IEEE Microwave Theory and Techniques Society (MTT-S) and is part of Microwave Week, when the IEEE RFIC Symposium and ARFTG Conference meet at the same location. Rick Campbell, KK7B, will moderate an Amateur Radio panel, 'Using Amateur Radio to Enhance Engineering Education.' The lineup of presenters includes 'Mr. Moonbounce,” Al Katz, K2UYH ..."

Monday 29

Mitigating Wave Action Interference in Navy AN/ARC-210 Airborne Radio

Mitigating Wave Action Interference in Navy AN/ARC-210 Airborne Radio - RF Cafe"U.S. Navy airborne radio communications experts needed the ability for low-flying aircraft to receive and network data amid radio interference caused by ocean wave action. They found their solution from Rockwell Collins in Cedar Rapids, Iowa. Officials of the Naval Air Systems Command at Patuxent River Naval Air Station, Md., announced their intention Tuesday to contract with Rockwell Collins to enable the company's AN/ARC-210 airborne radio's Ethernet interface to accept data for transport ..."

Antenova's New Grandis Antenna for ISM, LPWAN, IoT and Smart Cities

Antenova's New Grandis Antenna for ISM, LPWAN, IoT and Smart Cities - RF CafeAntenova, manufacturer of antennas and RF antenna modules for M2M and the Internet of Things, is announcing a new antenna, Grandis, part number SR42I010. It is an SMD antenna that is physically smaller yet provides enhanced performance in the 863-870 MHz and 902-928 MHz bands. It directly targets the growing number of M2M and IoT applications using the LPWAN protocols. With Grandis, Antenova has reduced the footprint of the LPWAN antenna to 12.0 x 11.0 x 1.6 mm, while also enhancing the antenna’s performance ...

Wi-Fi Photographs People in 3D Through Walls

Wi-Fi Photographs People in 3D Through Walls - RF Cafe"Wi-Fi can pass through walls. This fact is easy to take for granted, yet it's the reason we can surf the web using a wireless router located in another room. But not all of that microwave radiation makes it to (or from) our phones, tablets, and laptops. Routers scatter and bounce their signal off objects, illuminating our homes and offices like invisible light bulbs. Now, German scientists have found a way to exploit this property to take holograms, or 3D photographs, of objects inside a room from outside ..."

Sunday 28

Engineering Crossword Puzzle for May 28

Engineering Crossword Puzzle for May 28, 2017 - RF CafeFor the sake of avid cruciverbalists amongst us, each week I create a new crossword puzzle that has a theme related to engineering, mathematics, chemistry, physics, and other technical words. You will never be asked the name of a movie star unless he/she was involved in a technical endeavor (e.g., Hedy Lamarr). Enjoy! ...

Friday 26

VidaRF Announces 64-Way, 3.4-4.2 GHz, SMA Power Divider

VidaRF Announces 64-Way, 3.4-4.2 GHz, SMA Power Divider - RF CafeGet your SMA torque wrench oiled and calibrated! VidaRF offers new 64-way power divider model VPD-3442A64, with a frequency range from 3.4-4.2 GHz. Providing 30 W power as splitter and low insertion loss. SMA connectors. This model also provides high isolation port to port (≥20 dB) and excellent amplitude and phase balance (≤±10°). Operating temp -55 to +85 °C. Sealed and painted to meet IP65 standards ...

Norelco Advertisement, April 1957 Radio & TV News

Norelco Advertisement, April 1957 Radio & TV News - RF CafeYou will be excused for not knowing that Norelco, famous today (or was it seemingly just yesterday?) for its line of electric shavers, coffee makers, and cassette recorders, once was famous for its radio loudspeakers. Norelco also offered a line of wooden speaker cabinets. This advertisement appeared in the April 1957 issue of Radio and TV News magazine. "Sink me, the copy writer's a poet," to paraphrase Sir Percy Blakeney from The Scarlet Pimpernel ..."

Assurance Technology Corporation Looking RF Design Engineers

Assurance Technology Corporation Looking RF Design Engineers - RF CafeAssurance Technology Corporation has several positions available for RF Engineers to design and develop RF receivers for space, airborne and tactical applications. Frequency ranges include HF, VHF, UHF and above (to K-band). Transmitter and power amplifier design engineering positions are also available. The facility is NW of Boston, Massachusetts, outside of the congested city, but near Lowell. Take a look at the photo of their campus - what a place to work! ...

National Instruments Preview 5G to 6G

National Instruments Preview 5G to 6G - RF CafeFinally! This is the first mention I have seen of sixth-generation (6G) cellular networks and equipment... well, at least since my 2015 article Proposed 6G Cellular Standard Announced. "5G is not yet standardized, but wireless carriers know that if they wait to invest they will fall behind... Meanwhile, engineers at DARPA have created a competition for software defined radios that could completely change the nature of wireless transmissions. Today's 5G testing and tomorrow's 6G work were both on display this week ..."

Comics with an Electronics Theme, August 1955 Popular Electronics

Comics with an Electronics Theme, August 1955 Popular Electronics - RF CafeAfter a long, tough week, Friday is always a good time for a little levity. These two electronics-themed comics appeared in the August 1955 edition of Popular Electronics. At the bottom of the page is a list with more than 70 other collections of electronics-themed comics from vintage magazines like Electronics World, Radio and Television News, Radio Craft, and others ...

Particle-Free Quantum Communication Achieved in Lab

Particle-Free Quantum Communication Achieved in Lab - RF Cafe"Four years ago, theoretical physicists proposed a new quantum-communication scheme with a striking feature: it did not require the transmission of any physical particles. The research raised eyebrows, but now a team of physicists in China claims it has demonstrated that the "counterfactual" scheme works. The group built an optical apparatus that it says can transfer a simple image while sending (almost) no photons in the process. The theoretical proposal was put forward by ..."

Thursday 25

Fairview Microwave Low-PIM 4.3-10 Connectors and Adapters

Fairview Microwave Launches New Low-PIM 4.3-10 Connectors and Adapters - RF CafeFairview Microwave has released 18 new 4.3-10 connectors and adapters with low-PIM performance of -166 dBc typical and a maximum operating frequency of 6 GHz. Typical applications include wireless base stations, small cells, custom cable assemblies, antenna feeder cables, mobile communications systems and distributed antenna systems (DAS). Fairview's new 4.3-10 connectors and adapters deliver VSWR as low as 1.08:1 and low coupling torque. They feature silver-plated center contacts and a tri-metal finish. They feature silver-plated center contacts and a tri-metal finish on the body ...

The Power FET

The Power FET, June 1969 Electronics World - RF CafeCrystalonics is not a name that immediately comes to mind when thinking about semiconductor manufacturers. They appear in this 1969 article in Electronics World magazine about power field effect transistors (FETs). Many semiconductor companies came and went in the last days of vacuum tube active devices. Surprisingly, a Google search revealed that Crystalonics is alive and well in Ronkonkoma, New York. Per their website: Formed in 1958, CRYSTALONICS is a broad line semiconductor manufacturer ...

Stable 1-dimensional Metallic Material Created

Stable 1-Dimensional Metallic Material Created - RF Cafe"Researchers have developed the world's thinnest metallic nanowire, which could be used to miniaturise many of the electronic components we use every day. The researchers, from the Universities of Cambridge and Warwick, have developed a wire made from a single string of tellurium atoms, making it a true one-dimensional material. These one-dimensional wires are produced inside extremely thin carbon nanotubes (CNTs) - hollow cylinders made of carbon atoms. The finished 'extreme nanowires' are less ..."

Saelig Intros Teledyne LeCroy BPA Low Energy Bluetooth Protocol Analyzer

Saelig Intros BPA Low Energy Bluetooth Protocol Analyzer from Teledyne LeCroy - RF CafeSaelig Company, Inc. has announced the availability of the BPA low energy Bluetooth Protocol Analyzer from Teledyne LeCroy - a powerful, portable protocol analyzer for wireless transmissions that adhere to Bluetooth low energy specifications. Ideal for field or lab use, the BPA low energy analyzer is USB powered, eliminating the need for an external power supply. This analyzer supports all of the mandatory Bluetooth low energy features through Bluetooth version 4.2, and ships with Frontline software allowing Bluetooth ...

Many Thanks for Alliance Test Equipment's Support!

Alliance Test EquipmentAlliance Test sells used / refurbished test equipment, we offer short- and long-term rentals. We also offer repair, maintenance and calibration. Prices discounted up to 80% off list price. Agilent/HP, Allied Test Equipment Products - RF CafeTektronix, Anritsu, Fluke, R&S and other major brands. A global organization with ability to source hard to find equipment through our network of suppliers. Please visit Allied Test Equipment today to see how they can help your project ...

The Benefits of Antenna Testing

Antenna Test Lab Co Anechoic Chamber - RF CafeGlenn Robb, owner of Antenna Test Lab Company, wrote a white paper titled "The Benefits of Antenna Testing" which is now available on RF Cafe. Since 2001, AntennaTestLab.com has evaluated countless antennas and RF transmitter products. With a fully anechoic chamber, antennas can be quickly developed and RF products refined and deployed. The key phrase in the paper is "...risks of non-testing ... often lead to impaired wireless system performance and poor product reputations." That applies to stand-alone, surface mount, and printed antennas. Can you afford ..."

NASA Mission Uncovers Dance of Electrons in Space

NASA Mission Uncovers Dance of Electrons in Space - RF Cafe"You can't see them, but swarms of electrons are buzzing through the magnetic environment - the magnetosphere - around Earth. The electrons spiral and dive around the planet in a complex dance dictated by the magnetic and electric fields. When they penetrate into the magnetosphere close enough to Earth, the high-energy electrons can damage satellites in orbit and trigger auroras. Scientists with NASA's Magnetospheric Multiscale, or MMS, mission study the electrons' dynamics to better understand their behavior. A new study, published ..."

Wednesday 24

Troll Systems Intros 8-Input Diversity Receiver

Troll Systems Intros 8-Input Diversity Receiver and Remote Antenna Site IP -Based Controller - RF CafeShown for the first time a NAB Troll's DMR series receivers combines a multi-channel microwave receiver with a remote site diversity antenna controller. The combination provides a two (2) to eight (8) channel diversity receiver for remote Electronic News Gathering (ENG) or law enforcement antenna sites. The DMR processor performs video decryption, encryption, video and audio decoding for local monitoring and secure IP transport to remote control centers. The DMR's front panel touchscreen enables live video and audio preview, control and ...

Radar Simulator to Characterize Debris Particles in Tornadoes

Radar Simulator to Aid Characterization of Scattering Debris Particles in Tornadoes - RF Cafe"A team of researchers from University of Oklahoma's Advanced Radar Research Center have jointly developed the world’s first numerical polarimetric radar simulator. The simulator will be used to study and characterize scattering mechanisms of debris particles in tornadoes. Scattering debris from a tornado is known to cause most of the damages. A tornado's debris characteristics are generally poorly understood even though the upgradation of the radar network to a dual polarimetric radar offers ..."

Notable Tech Quote: Glenn Robb

Notable Tech Quote: Glenn Robb - RF Cafe"Wishful thinking is not a good system test practice." - Glenn Robb, owner of Antenna Test Lab Company of Raleigh, North Carolina. Glenn happened to use that line in a note to me, and I asked permission to use it as a Notable Quote ...

Written in the Stars

Written in the Stars, September 1953 QST - RF CafeRod Newkirk was a frequent contributor to the ARRL's QST magazine. In addition to writing the "How's DX?" column from 1947 to 1978, he occasionally had humorous short stories related to Hamdom. Here, Ms. Susie Sopenwater (a sort of 'soap and water' portmanteau; i.e., pure and clean) gets interested in amateur radio after winning the Miss America pageant and finds plenty of volunteers to help her earn her license and set up a 'shack.' Susie's call sign was, WN5P!P. My guess is that the WN5 part is an allusion ...

Please Welcome Axiom Test Equipment as a New Advertiser

Axiom Test Equipment - RF CafeAxiom Test Equipment allows you to rent or buy test equipment, repair test equipment, or sell or trade Axiom Test Equipmenttest equipment. They are committed to providing superior customer service and high quality electronic test equipment. Axiom offers customers several practical, efficient, and cost effective solutions for their projects' TE needs and is committed to providing superior customer service and high quality electronic test equipment. Please check out Axiom Test Equipment today! ...

BrightSparks Trophies Make Their Mark

BrightSparks Trophies Make Their Mark - RF Cafe"An important element of any awards ceremony, of course, is the award itself. And BrightSparks 2017 would be no different. But to celebrate innovative and young winners we wanted to avoid familiar, tried and tested trophies and statuettes. Step forward Saar Drimer, a talented designer, who agreed to customise and create the BrightSparks trophies. A distinctively unique 'supra-component' of the awards ceremony! The trophies were certainly well received on the day. Comments we overheard ..."

Empower RF Systems Remote Live Demonstrations at IMS 2017

Visit Empower RF Systems at IMS 2017 Booth 1007 for Remote Live Demonstrations - RF CafeEmpower RF Systems is conducting remote live demonstrations of our broadband, high power 1 kW, 1 to 3 GHz amplifier, Booth 1007. The amplifier will be housed in Los Angeles and viewed in the Hawaii exhibit venue with live streaming video while remotely controlling the amplifier from the exhibit floor through a standard web browser. What you will see is a demonstration of remote operation of the Empower 2170 1 kW RF amplifier in a test setup that includes a signal generator ...

Tuesday 23

USAF Electronic Weapons to Get an Electromagnetic Power Boost

USAF Electronic Weapons to Get an Electromagnetic Power Boost - RF Cafe"The Air Force is working with Raytheon to integrate high power electromagnetic (HPEM) capabilities with cyber and electronic warfare weapons systems to increase the effectiveness of EW weapons through higher energy pulses and the use of new methods of backdoor penetration. Raytheon, along with other industry developers, will experiment with and develop the most efficient and effective way to integrate HPEM technology with cyber and electronic warfare weapons systems. The goal is to identify the ideal radio frequency ..."

IC Frequency Dividers & Counters

IC Frequency Dividers & Counters, January 1969 Electronics World - RF CafeThe subject of IC-based digital circuits was relatively new in 1969 when this story was printed in Electronics World magazine and was probably considered expert knowledge. Note that it was written by a research engineer at the Lockheed Missiles and Space Company. Today, introductory digital logic courses begin with material presented here and advance rapidly into programmable logic, ASICs microprocessors, and beyond. Even if you have already taken courses on digital logic with counters and dividers, the knowledge might ...

Engineering Career and Job Hunting Advice for May 2017

Engineering Career and Job Hunting Advice for May 2017 - RF CafeReports on which jobs are seeing the fastest growth in a particular state are to be read with a bit of skepticism because intentional or not, bias and error are always an integral part of the results. The Monster job website presents just such a survey, and it is worth looking at since it does give a good idea of what types of jobs are in demand overall. It might just be accurate to boot. Evidently electrical and electronics repairers are ...

- 5 Ways to Open Your Next
    Business Presentation (unique)
- How Headhunters Use LinkedIn
    to Find Talented Candidates
- Engineering Dominates <more...>

Thanks to BBTLine for Their Continued Support!

BBTLine - BroadBand Transmission Line Products - RF CafeBBTLine offers a unique patented combiner / splitter design that allows for more compact devices while maintaining low insertion loss, excellent return loss and excellent amplitude/phase balance. These are not standard Wilkinson-style RF splitters. 2- and 4-way, broadband 0.5 - 6 GHz, low loss (0.7 dB @ 6 GHz), excellent amplitude / θ balance (±0.1 dB, ±1°), high power (20 W as splitter), surface mount & connectorized. Please visit BBTLine today to see how they can help your project ...

Webinar: EMSO Challenges for Military Radar and EW Systems

Webinar: EMSO Challenges for Military Radar and EW Systems - RF Cafe
Microwave Journal, R&S, and Wolfspeed present the free webinar titled Electromagnetic Spectrum Operations (EMSO) Challenges for Military Radar and Electronic Warfare Systems, on May 24 at 12:00 pm EST. Presented by Asif Anwar. "With the commercial market radio spectrum land grab continuing unabated, this webinar will look at the challenges for radar, EW and communications systems will include being able to operate effectively in an increasingly congested spectrum environment developing sharing mechanisms, while also combating new potential threats ...

ConductRF FPA Cable Assemblies, DC to 60 GHz

ConductRF FPA Cable Assemblies, DC to 60 GHz - RF CafeConductRF's FPA RF Cable Assemblies provide a cost effective high performance solution for applications typically supported by Semi-Rigid or high cost flexible precision cables. Our Multi-layer shielded cable provides both flexibility and form-ability by combining a flexible spiral foil over which is a tin plated copper braid which can be formed. This create a half-way situation, but with added benefits of lower costs, improved performance and enhanced shielding. FPA Cables are available on short lead-times with custom ...

Stanford Makes Biodegradable Semiconductor ICs

Stanford Makes Biodegradable Semiconductor ICs - RF Cafe"A Stanford University research group has created flexible, organic semiconductor devices that degrade on the addition of weak acid, such as vinegar (acetic acid). The results were published May 1 in the Proceedings of the National Academy of Sciences . The paper was co-authored with researchers from Hewlett Packard Enterprise and University of California Santa Barbara. The work is in part motivated by the need to reduce the production of electronic waste. The proliferation of electronic products, particularly smartphones on two-year upgrade cycles ..."

Monday 22

Neil Carleton's (VE3NCE) Radio Stamp Collection Auction May 23 & 24

Neil Carleton's (VE3NCE) Radio Stamp Collection Auction May 23 & 24 - RF CafeCanadian Ham radio operator Neil Carleton, a long-time member of the Almonte Amateur Radio Club, contacted me a few months ago about his amazing collection of radio-related stamps that has been a lifetime endeavor. Due to health issues, he has put his entire collection up for bid with Sparks Auctions, a prime handler of philatelic material. Neil's stamps are being offered on Tuesday, May 23 and Wednesday, May 24. These sets are bound in hand-designed albums and would make an excellent investment or gift for yourself, a deserving friend or relative, or even as a donation to a museum. Please take a look: Lot 846, Lots 1466, 1467, 1468, and Lot 1469 . Thanks!

Upgrading Missile Defense Early Warning Radar

Upgrading Missile Defense Early Warning Radar - RF Cafe"Radar experts at BAE Systems will continue maintaining, upgrading, and operating a global distributed radar network that provides missile defense and early warning of enemy ballistic missile launches and potential threats in space. Officials of the U.S. Air Force 21st Contracting Squadron at Peterson Air Force Base, Colo., announced a $48.5 million contract modification Wednesday to the BAE Systems Technology Solutions & Services segment in Rockville, Md., to manage, operate, maintain and logistically support the Solid State Phased Array Radar Systems ..."

Gallium Oxide Transistor Radio-Frequency Measurements

Gallium Oxide Transistor Radio-Frequency Measurements - RF Cafe"Researchers in the USA and Germany have claimed the first radio frequency (RF) measurements on β-crystal gallium oxide (β-Ga2O3) metal-oxide-semiconductor field-effect transistors (MOSFETs). The team from Air Force Research Laboratory (AFRL) in the USA, Leibniz Institute for Crystal Growth in Germany, and George Mason University and KBRwyle in the USA further claim record-high transconductance and frequency characteristics. 'The RF result is achieved through the reduction of contact resistance, due to a highly doped cap layer, and through the use of a gate ..."

Citizens Band and Business Radio Equipment

Citizens Band and Business Radio Equipment, March 1967 Electronics World - RF CafeBelieve it or not, there are still radio operators using Citizen Band (CB) and Business Radio (BR) equipment. That's right, cellphones (which are themselves radios) have not totally supplanted traditional radio for person-to-person communications. Prior to the widespread use of cellphones beginning in the mid-1990s, CB and BR were the only radios available for use by laymen without an individual license. When I worked as an electrician between high school and entering the U.S. Air Force, my service truck was equipped with a radio dispatch transceiver in the LMRS band ...

Single Atoms Feel Tidal Force

Single Atoms Feel Tidal Force - RF Cafe"Physicists have used interferometry to detect the minute tidal forces acting on individual atoms exposed to a local gravitational field. This allowed them to measure the curvature of space–time on a very small scale and argue that their observations are perhaps 'the first of gravity in a quantum-mechanical system.' The team adds that its sensitive apparatus might also improve prospecting for oil and minerals. Tidal forces arise due to the finite size of gravitating objects. When one body is attracted to ..."

Quantum Refrigerator for Silicon Chips Discovered

Quantum Refrigerator for Silicon Chips Discovered - RF Cafe"Quantum physicist Mikko Mottonen and his team at Aalto University have invented a quantum-circuit refrigerator, which can reduce errors in quantum computing. The global race towards a functioning quantum computer is on. With future quantum computers, we will be able to solve previously impossible problems and develop, for example, complex medicines, fertilizers, or artificial intelligence. The research results published this week in the scientific journal, Nature Communications, suggest how harmful errors in ..."

3D Smith Chart Software is Here!

3D Smith Chart v1.0 Software - RF Cafe Cool ProductDr. Andrei Muller, progenitor of the world's first 3D Smith Chart software program, has teamed with a handful of able colleagues to release this commercial version of this paradigm-changing design and analysis tool. 3D Smith Chart enables you to visualize S-parameter data in ways not possible from the Flatland dweller's perspective that is the traditional 2D Smith chart. Flatland existed in a plane, and from an observer's perspective a 3-dimensional object entering the plane from along the Z-axis seemed to appear out of nowhere ...

Planar Monolithic Industries' (PMI) May Product Announcement

Planar Monolithic Industries' (PMI) May Product Announcement - RF CafePlanar Monolithic Industries (PMI) recently introduced eight new products in their extensive line of RF and microwave components. The most interesting is the Feasibility Study on PMI RF Radar Sense & Avoid Systems for Small UAS (Unmanned Aerial Systems), i.e., a drone carrying radar. Also included are a couple 16-way power combiners, an EW receiver module, an and amplifier. Contact PMI today for more information ...

Sunday 21

Physics & Engineering Crossword Puzzle for May 21

Physics & Engineering Crossword Puzzle for May 21, 2017 - RF CafeFor the sake of avid cruciverbalists amongst us, each week I create a new crossword puzzle that has a theme related to engineering, mathematics, chemistry, physics, and other technical words. You will never be asked the name of a movie star unless he/she was involved in a technical endeavor (e.g., Hedy Lamarr). This week's puzzle grid is in the shape of a circulator. Enjoy ...

Please Visit Empower RF's Website in Appreciation of Their Support

Empower RF SystemsEmpower RF Systems is a global leader in power amplifier solutions. Products include high power RF amplifier modules, amplifier systems, and custom designed amplifiers. Empower RF Systems NextGen power amplifiers - RF CafeInvestments in both hardware and software engineering are yielding next generation products with significant size, weight, and interface functionality advantages over legacy products in the market ...

Friday 19

Experimental Laser Engines

Experimental Laser Engines, June 1969 Electronics World - RF CafeIn 1969 when this article appeared in Electronics World magazine, laser technology was still in the realm of rare earth elements and bulky gas chambers with monster power

RF Cascade Workbook 2018 by RF Cafe PCB Directory (Manufacturers)
Rohde & Schwarz USA (RF Component Pocket Guide) - RF Cafe Res-Net Microwave - RF Cafe
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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