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Exodus Advanced Communications

Homepage Archive - July 2020 (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. About RF Cafe.

Homepage Archive Pages

2020:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2019:
  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
2018:  Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec
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
2012:  1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13


See Page 1 | 2 | 3 | 4 | of the July 2020 homepage archives.
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Friday 10

Thursday 9

For the Record: The Flat Age

For the Record: The Flat Age, July 1955 Radio & Television News - RF CafeRadio & Television News editor Oliver Reed wrote in this 1955 issue about the "flattening" of electronics - including both individual components and overall assembled products. He described a large screen, wall-mountable television system with built-in flat stereo electrostatic speakers. "The so-called 'picture on the wall' television screen has also received widespread publicity although such a screen is not yet commercially available. In this system, a flat screen is connected to the TV receiver by means of a cable, and the picture is formed on the screen electronically." That is a lot like a large flat LCD or LED monitor being fed by an HDMI cable from a computer. Mr. Reed also writes of a magnetic tape video playback system akin to what eventually became the VHS / VCR. Evidently the concept of an optical-based storage medium like the DVD and Blu-ray disk was too far out of the realm of possibility...

Guidelines for Choosing RF and Microwave Products: Coaxial Cables

Guidelines for Choosing RF and Microwave Products - RF CafeAnatech Electronics has a handy app note describing how to select and specify coaxial cables and assemblies. "Coaxial cables are too often taken for granted and RF and microwave systems. As a result, they are often treated like a spool of bell wire, twisted, band, crimped, stepped on, and subject to assorted other abuses. However, the more you know about coaxial cable the more likely you are to treat it with respect, as its integrity, lifetime, and overall performance are at stake. To get a better understanding of coaxial cables in general, Anatech Electronics has prepared a series of guides that provide information about RF and microwave coaxial cables ranging from the basics contained in this application note to more detailed information about characteristics, applications, specific cable types, and other topics..."

Get Your Custom-Designed RF Cafe Gear!

Custom-Designed RF-Themed Cups, T-Shirts, Mouse Pads, Clocks (Cafe Press) - RF CafeThis assortment of custom-designed themes by RF Cafe includes T-Shirts, Mouse Pads, Clocks, Tote Bags, Coffee Mugs and Steins, Purses, Sweatshirts, and Baseball Caps. Choose from amazingly clever "We Are the World's Matchmakers" Smith chart design or the "Engineer's Troubleshooting Flow Chart." My "Matchmaker's" design has been ripped off by other people and used on their products, so please be sure to purchase only official RF Cafe gear. My markup is only a paltry 50¢ per item - Cafe Press gets the rest of your purchase price. These would make excellent gifts for husbands, wives, kids, significant others, and for handing out at company events or as rewards for excellent service. It's a great way to help support RF Cafe. Thanks...

Many Thanks to Lemos International Technologies for Continued Support!

Lemos International - RF CafeLemos International Technologies is both a designer and manufacturer of wireless products and a distributor of products from other world-class manufacturers. A modular approach to wireless connectivity helps eliminate much of the technical design and testing and also simplifies or eliminates the need for expensive conformance testing and certification. Ready-to-use Bluetooth, GPS, Wi-Fi, licensed and unlicensed band products are available. Custom design services can help you achieve success with your project's unique needs.

Editorial re FCC Potentially Shutting Down Amateur Radio During WWII

Editorial on FCC Potentially Shutting Down Amateur Radio During WWII, November 1940 QST - RF Cafe"Do you think that F.C.C. would be engaged in the present terrific expense and effort of getting our fingerprints and citizenship histories if there were intention of shutting us down shortly?" That statement was printed by the QST magazine editor in the issue that preceded the December 7, 1941, attack on Pearl Harbor by thirteen months. A few things about it are troubling. First, the FCC was collecting fingerprints of licensed amateur radio operators. Second, the FCC was assimilating information about licensed amateur radio operators' citizenship histories. Third, a combination of short-sightedness and apparent naiveté concerning the FCC's willingness to shut down amateur radio operations once America had been inevitably drawn into World War II...

Withwave Multicoax Cable Assemblies

Withwave Multichannel Coaxial Cable AssembliesWithwave's High Speed & High-density Multicoax Cable Assemblies (WMX Series) provides a wide range of multiple coax connectors and flexible cable assemblies with a choice of 20, 40, 50, 67 GHz configurations based on precision array design and superior high frequency cabling solutions. WMX Series cables are excellent signal integrity solutions for bench-top testing and automated test equipment to meet increasing demands of semiconductor test equipment and optical testing industries. These products consist of high performance flexible assemblies which can be bundled in housings (8 and 16 channels) and the interface to board is compression type which provides lower total cost of testing by avoiding costly soldering components...

KR Electronics: RF & Microwave Filters

KR ElectronicsKR Electronics designs and manufactures high quality filters for both the commercial and military markets. KR Electronics' line of filters includes lowpass, highpass, bandpass, bandstop and individually synthesized filters for special applications - both commercial and military. State of the art computer synthesis, analysis and test methods are used to meet the most challenging specifications. All common connector types and package form factors are available. Please visit their website today to see how they might be of assistance. Products are designed and manufactured in the USA.

Wednesday 8

Hi-Fi Anagram (crossword, actually)

Hi-Fi Anagram, July 1958 Radio & Television News - RF CafeFrom about the middle of the 1950s through the 1990s, stereo systems were a pretty big deal amongst music listeners. A lot of the interest was driven by rapid improvements in technology in sound recording and reproduction equipment. An economical boom in the post Korean War years combined with a process developed by Emory Cook to cut dual channels of stereophonic sound onto vinyl records enabled a fad fueled by teenagers of building the best home sound systems possible with available funds. Audiophiliac adults, of course, were also prime motivators of the technology since they had deeper pockets and could afford higher-end equipment and larger collections of records. Magnetic tape was also a bit part of the craze, but the big money was in vinyl. If you peruse the vintage electronics magazines like this Radio & TV News, Popular Electronics, Electronics World, et al, you will notice the pages were filled with technical articles on and advertisements for stereo music reproduction gear...

Measuring Tiny Quasiparticle a Major Step for Semiconductor Technology

Measuring Tiny Quasiparticle a Major Step for Semiconductor Technology - RF Cafe"A team of researchers led by Sufei Shi, an assistant professor of chemical and biological engineering at Rensselaer Polytechnic Institute, has uncovered new information about the mass of individual components that make up a promising quasiparticle, known as an exciton, that could play a critical role in future applications for quantum computing, improved memory storage, and more efficient energy conversion. Published today in Nature Communications, the team's work brings researchers one step closer to advancing the development of semiconductor devices by deepening their understanding of an atomically thin class of materials known as transitional metal dichalcogenides (TMDCs), which have been eyed for their electronic and optical properties..."

Make Sure EVs and HEVs Are Good for Every Mile

Make Sure EVs and HEVs Are Good for Every Mile - RF CafeAxiom Test Equipment, an electronic test equipment rental and sales company has published a new blog post that examines electric vehicles (EVs) and hybrid electric vehicle (HEVs) power systems to understand what should be tested and how to perform those measurements in order to achieve peak vehicle operation. Manufacturers of EVs and HEVs are making it simpler and more convenient to maintain adequate electric charge levels to keep their vehicles running for longer distances on electric power, enticing more drivers to try these environmentally friendly vehicles. Of course, testing the electrical motors, systems, and their components is an important part of ensuring that every EV and HEV has the longest running times and operating lifetimes possible, and that involves understanding what needs to be tested and how...

Many Thanks to Res-Net Microwave for Continuing Support!

Res-Net Microwave Components - RF CafeRes-Net Microwave has a complete line of precision RF & microwave components including attenuators, terminations, resistors, and diode detectors for commercial, military, and space applications. Products range from the small flange type to large 2,000 watt connectorized power attenuators and/or terminations at frequencies up to 26.5 GHz. In-house photo etch and laser trim capability. The company is a leader in development and production of the films required for these type of RF/microwave components. Please check out Res-Net Microwave's website to see how they can help with your current project.

Your Antenna - Key to World-Wide DX

Your Antenna - Key to World-Wide DX, November 1959 Popular Electronics - RF CafeHere is a quick course on how to point antennas for over-the-horizon (DX) reception, and, if you also happen to have a license to transmit, for broadcasting. It covers how to determine the shortest straight-line path by stretching a string around a globe (remember those spherical maps that used to be a mainstay of every household and schoolroom?) and using a protractor (a what?) to get the angle. Radio signals unless refracted or reflected take a great circle route from point A to point B. Long distance airline flights take the same routes, which explains why flights from London to Los Angeles fly over Greenland enroute. Author Edward Noll uses a simple 1/2-wave dipole antenna radiation pattern as an example of how directivity is affected by frequency (relative to the fundamental)...

ConductRF TSA90 / TSX90 Phase & Temperature Stable Cables

ConductRF TSA90 / TSX90 Phase & Temperature Stable Coaxial Cables - RF CafeConductRF's DC to 18 GHz TSA90 with Type-N and SMA options as well as our TSX90 with extended frequency 27 GHz SMA solutions, are built with a special dielectric material that eliminates the "Teflon Knee" in phase change over temperature, which is a common cause for performance variance in RF cables used in different environments. These cables are over 30% smaller than traditional lab test cables, so offer users increased flexibility and density particularly where multiple cables are used together such as semiconductor testing. With connector options up to 27 GHz, these cables can offer users solutions for both RF test and also internal system cables. The triple shielding feature also ensure greater effectiveness for EMI...

Innovative Power Products: RF & Microwave Passive Components

Innovative Power ProductsInnovative Power Products (IPP) has over 30 years of experience designing & manufacturing RF & microwave passive components. Their high power, broadband couplers, combiners, resistors, baluns, terminations and attenuators are fabricated using the latest materials and design tools available, resulting in unrivaled product performance. Applications in military, medical, industrial and commercial markets. Take a couple minutes to visit their website and see how IPP can help you today.

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Empower RF Systems' Technologically Advanced 90 kW SSPA

Empower RF Systems' Technologically Advanced 90 kW Power Amplifier - RF CafeEmpower RF Systems' Model 2225 is a long duty cycle pulsed amplifier operating from 5.2 to 5.9 GHz and represents our new technologically advanced liquid cooled and scalable architecture. This breakthrough solid state GaN design replaces tube technology to bring new capabilities to EW, Radar, Directed Energy and Satcom applications where tens and hundreds of kilowatts of CW and Pulse power are required. This new modern architecture offers scalability for affordable upgrade paths to future power needs by adding hardware to an existing system. Additional racks can be combined and for racks not fully populated, 2U amplifier drawers can be added without the need for tuning. The amplifier system layout consists of a system controller in a 3U and up to 16 hot swappable 2U amplifier drawers with each amplifier drawer containing an integrated power supply in its 2U chassis...

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

   Comics with an Electronics Theme February 1967 Popular Electronics

 

  Electronics-Themed Comics June 1951 Radio-Electronics  

Engineering Job Opening

Promote Your Company on RF Cafe for as Little as $40/mo.

Sponsor RF Cafe for as Little as $40 per Month - RF CafeRF Cafe typically receives 8,000-15,000 website visits each weekday and about half that on weekends. RF Cafe is a favorite of engineers, technicians, hobbyists, and students all over the world. With more than 13,000 pages in the Google search index, RF Cafe returns in favorable positions on many types of key searches, both for text and images. New content is added on a daily basis, which keeps the major search engines interested enough to spider it multiple times each day. Items added on the homepage often can be found in a Google search within a few hours of being posted. I also re-broadcast homepage items on LinkedIn. If you need your company news to be seen, RF Cafe is the place to be. Advertising begins at $40/month.

RF Cascade Workbook 2018

RF Cascade Workbook 2018 Is Available Now! - RF CafeRF Cascade Workbook 2018 is the next phase in the evolution of RF Cafe's long-running series, RF Cascade Workbook. Chances are you have never used a spreadsheet quite like this. It is a full-featured RF system cascade parameter and frequency planner that includes filters and mixers for a mere $45. Built in MS Excel, using RF Cascade Workbook 2018 is a cinch and the format is entirely customizable. It is significantly easier and faster than using a multi-thousand dollar simulator when a high level system analysis is all that is needed. An intro video takes you through the main features...

RF & Electronics Symbols for Visio

RF Electronics Wireless Analog Block Diagrams Symbols Shapes for Visio - RF CafeWith more than 1000 custom-built symbols, this has got to be the most comprehensive set of Visio Symbols available for RF, analog, and digital system and schematic drawings! Every object has been built to fit proportionally on the provided A-, B- and C-size drawing page templates (or can use your own). Symbols are provided for equipment racks and test equipment, system block diagrams, conceptual drawings, and schematics. Unlike previous versions, these are NOT Stencils, but instead are all contained on tabbed pages within a single Visio document. That puts everything in front of you in its full glory. Just copy and paste what you need on your drawing. The file format is XML so everything plays nicely with Visio 2013 and later...

Get Your Custom-Designed RF Cafe Gear!

Custom-Designed RF-Themed Cups, T-Shirts, Mouse Pads, Clocks (Cafe Press) - RF CafeThis assortment of custom-designed themes by RF Cafe includes T-Shirts, Mouse Pads, Clocks, Tote Bags, Coffee Mugs and Steins, Purses, Sweatshirts, and Baseball Caps. Choose from amazingly clever "We Are the World's Matchmakers" Smith chart design or the "Engineer's Troubleshooting Flow Chart." My "Matchmaker's" design has been ripped off by other people and used on their products, so please be sure to purchase only official RF Cafe gear. My markup is only a paltry 50¢ per item - Cafe Press gets the rest of your purchase price. These would make excellent gifts for husbands, wives, kids, significant others, and for handing out at company events or as rewards for excellent service. It's a great way to help support RF Cafe. Thanks...

Post Your Engineer & Technician Job Openings on RF Cafe for Free

Engineering Job Board - RF CafeRF Cafe's raison d'être is and always has been to provide useful, quality content for engineers, technicians, engineering managers, students, and hobbyists. Part of that mission is offering to post applicable job openings. HR department employees and/or managers of hiring companies are welcome to submit opportunities for posting at no charge. 3rd party recruiters and temp agencies are not included so as to assure a high quality of listings. Please read through the easy procedure to benefit from RF Cafe's high quality visitors...

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DoD Gets $120M for Hypersonic Tracking Satellites

Dod Gets $120M for Hypersonic Tracking Satellites - RF Cafe"The Senate's annual defense policy bill would authorize an additional $120M toward a space-based sensor layer capable of tracking hypersonic weapons, despite the fact the Department of Defense did not seek more funding for the project in its fiscal 2021 budget requests. The Hypersonic and Ballistic Tracking Space Sensor is DoD's answer to the growing threat posed by hypersonic weapons being developed by China and Russia. Hypersonic weapons present a significant challenge to the United States' current missile warning architecture. Not only can these weapons maneuver around ground based sensors, they're too dim to be picked up and tracked by space-based sensors in higher orbits. HBTSS theoretically solves this problem via a proliferated constellation of Overhead Persistent Infrared (OPIR) sensors operating in low earth orbit..."

Automotive Radar Spots Hazards Around Corners

Automotive Radar Spots Hazards Around Corners - RF Cafe"Using radar commonly deployed to track speeders and fastballs, researchers have developed an automated system that will allow cars to peer around corners and spot oncoming traffic and pedestrians. The system, easily integrated into today's vehicles, uses Doppler radar to bounce radio waves off surfaces such as buildings and parked automobiles. The radar signal hits the surface at an angle, so its reflection rebounds off like a cue ball hitting the wall of a pool table. The signal goes on to strike objects hidden around the corner. Some of the radar signal bounces back to detectors mounted on the car, allowing the system to see objects around the corner and tell whether they are moving or stationary..."

Simulation Microscope Examines Transistors of Future

Simulation Microscope Examines Transistors of Future - RF Cafe"Since the discovery of graphene, two-dimensional materials have been the focus of materials research. Among other things, they could be used to build tiny, high-performance transistors. Researchers at ETH Zurich and EPF Lausanne have now simulated and evaluated one hundred possible materials for this purpose and discovered 13 promising candidates. With the increasing miniaturization of electronic components, researchers are struggling with undesirable side effects: In the case of nanometer-scale transistors made of conventional materials such as silicon, quantum effects occur that impair their functionality. One of these quantum effects, for example, is additional leakage currents, i.e. currents that flow 'astray' and not via the conductor provided between the source and drain contacts. It is therefore believed that Moore's scaling law..."

Photonic Microwave Generation Using On-Chip Optical Frequency Combs

Photonic Microwave Generation Using On-Chip Optical Frequency Combs - RF Cafe"In our information society, the synthesis, distribution, and processing of radio and microwave signals happen ubiquitously in wireless networks, telecommunications, and radars. The current tendency is to use carriers in higher frequency bands, especially with looming bandwidth bottlenecks due to demands for 5G and the Internet of Things. Microwave photonics, a combination of microwave engineering and optoelectronics, might offer a solution. A key building block of microwave photonics is optical frequency combs, which provide hundreds of equidistant and mutually coherent laser lines. They are ultra short optical pulses emitted with a stable repetition rate that corresponds precisely to the frequency spacing of comb lines. The photodetection of the pulses produces a microwave carrier..."

Plasmonic Chip for Ultrafast Data Transmission Using Light

Plasmonic Chip for Ultrafast Data Transmission Using Light - RF Cafe"Researchers from ETH Zurich have achieved what scientists have been attempting to do for some 20 years: in their laboratory work as part of European Horizon 2020 research projects, they have manufactured a chip on which fast electronic signals can be converted directly into ultrafast light signals - with practically no loss of signal quality. This represents a significant breakthrough in terms of the efficiency of optical communication infrastructures that use light to transmit data, such as fiber optic networks. In cities like Zurich, these fiber optic networks are already being used to deliver high-speed internet, digital telephony, TV, and network-based video or audio services (streaming). Today's optical networks achieve data transmission rates in the region of gigabits per second..."

Microwave Amplifier Circuit Using Flexible Wooden Film

Microwave Amplifier Circuit Using Flexible Wooden Film - RF Cafe"In the not-too-distant future, flexible electronics will open the door to new products like foldable phones, tablets that can be rolled, paper-thin [get it? paper - wood] displays and wearable sensors that monitor health data. Developing these new flexible / bendy products means using materials like new plastics and thin films to replace the rigid circuit boards and bulky electronic components that currently occupy the interiors of cell phones and other gadgets. New research by a University of Wisconsin-Madison engineer leverages a surprising and inexpensive substance - wood - to make the flexible microwave circuits that can power modern communications. In a paper published in the journal Nature Communications..."

 

 

 

 

 

 

 

 

 

 

 

 

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About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,
    BSEE - KB3UON

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 World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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