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Click here to read about RF CafeKirt Blattenberger
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- Welcome to the RF Cafe Website -
"Never trust an atom. They make up everything." - Anon

Today in Science History

High Tech News
- Headline Archives -

Crowd Funding Changing the Game for Chip Firms

Hungry Weasel Shuts down Large Hadron Collider (LHC originally to built in Texas)

Take Part in "the Engineer's" 2016 Salary Survey

Global Semi Packaging Materials Market to Grow at 4.79% from 2016-2020

Superfast Light Source Made from Artificial Atom

U.S. House Unanimously Passes Email Privacy Act

This Tech Bubble Is Bursting, WSJ

Wi-Fi Hotspot Named 'Detonation Device' Causes Bomb Scare at Airport

SecDef OKs Arms Sales to N. Vietnam (call it "The Jane Fonda Accord")

Electronics Firms Win Queen's Awards

Pasternack Expands In-Stock PIN
Diode Switches for 10 MHz to 67 GHz

Pasternack Expands Portfolio PIN Diode Switches 10 MHz to 67 GHz - RF CafePasternack, a leading provider of RF, microwave and millimeter wave products, greatly expands their portfolio of in-stock solid state PIN diode switches covering frequencies from 10 MHz to 67 GHz. 69 unique new models of 50 ohm PIN diode switches are available in compact connectorized package styles and display impressive isolation, insertion loss, and switching speed performance. Pasternack's new PIN diode switches offer a broad range of solutions in applications where fast switching and long lifetime are ...

Air Force Needs Antennas for Future
High-Power Microwave Weapons

Air Force Looking for Power Sources and Antennas for Future High-Power Microwave Weapons - RF Cafe"U.S. Air Force researchers are asking industry to develop power sources and antennas for future high-power microwave weapons and for other aerospace and defense uses. Officials of the Air Force Research Laboratory at Kirtland Air Force Base, N.M., released a solicitation Tuesday for the source and antenna portion of the High-Powered Electromagnetics (HPEM) research program. The overall HPEM project seeks to develop high-power electromagnetics technologies not only for directed-energy weapons, but also for cyber warfare, EW, electronics-killing weapons ..."

API Intros Miniature, In-Line,
Coaxial Rotary Joints

API Technologies Miniature, In-Line Rotary Joints - RF Cafe"API Technologies offers a standard line of rotary joints, formerly manufactured by Sage Labs, suitable for use in commercial and military applications. The term rotary joint describes a device used to transmit energy from a stationary RF line to a rotating RF line." The 345 and 351 series covers DC to 40 with VSWRs in the 1.2:1 to 1.75:1 range. Peak power handling is 500 W. Max rotation rate is 100 rpm. SMA & 2.92 mm connectors. WOW is the per revolution variation, same as with audio equipment ...

Thomas Edison in John Hancock Ad
in The Saturday Evening Post

Thomas Edison in John Hancock Advertisement from the April 29, 1950 The Saturday Evening Post - RF CafePresenting yourself or your company as being modeled after a person of great accomplishment has been a common promotional tactic for as long as there has been print media. The John Hancock chose in this issue of The Saturday Evening Post to suggest, albeit by an indirect approach, to elicit the admiration Americans had for Thomas Edison's lust for innovation and desire to make people's lives better in hopes that readers would associate Edison with the insurance company. While the juxtaposition is strained, I do like one line in particular, "He lured electricity into a bottle and taught it to glow with good cheer." This short tribute to on of the world's greatest engineers is worth your a few moments of your valuable time ...

Cobham Universal Spring Mount
Antenna Range Sticks Its Neck Out

Cobham Universal Spring Mount Antenna Range Sticks Its Neck Out - RF CafeCobham Antenna Systems announces the launch of a dual-band, Gooseneck addition to the 'Universal' spring mount range of omni-directional antennas. The Gooseneck antenna, along with a selection of the 'Universal' spring mount antennas, will be available to view on Cobham's booth #1319 at (AUVSI's) XPONENTIAL 2016 in New Orleans, Louisiana. The OA2-2.3V-5.2V/2358 is a ground plane independent, dual band antenna which covers the frequency ranges 2.10 – 2.60 GHz and 4.40 – 6.00 GHz, offering 4 dBi gain in the higher frequencies ...

Lockheed Martin's Laser Defense
System Can Take Down Any Missile

Lockheed Martin's Laser Defense System Can Take Down Any Missile - RF Cafe"Part of the issues that have held laser defense systems back in the past is the incredible amount of power needed to operate the mechanisms, as well as their operating inefficiencies. In theory, the technology has shown a lot of promise when it comes to defense integration, and it would appear that Lockheed Martin has begin to overcome some of the previously limiting factors in the industry. Lockheed Martin claims to have developed 'innovative fiber lasers, sophisticated beam control and auxiliary technologies,' pushing the boundaries of what laser systems can do. Lasers can ..."

Antenna Design Turns Entire
Vehicles into Broadcast Equipment

Antenna Design Turns Entire Vehicles into Broadcasting Equipment - RF Cafe"High-frequency antennas transmit radio waves across vast distances and even over mountain ranges using very little energy, making them ideal for military communications. These devices, however, have one big problem: They need to be huge to operate efficiently. Instead of adding more bulk, University of Wisconsin–Madison engineers are working to increase the effective size of antennas by turning the military vehicles that carry them into transmitters—using the structures that support the antennas themselves to help broadcast signals. Troops in remote locations need to communicate by radio ..."

Times Microwave Weatherproofing
Kits for RF Connectors

Times Microwave Intros Weatherproofing Kits for RF and Microwave Connectors - RF Cafe"Times Microwave Systems in Wallingford, Conn., is introducing the IPB weatherproofing kits for RF and microwave connectors in long-term outdoor deployments and mission-critical short term deployments. The IPB boots come in two different interface sizes (N and 7/16 DIN). The 'N' boots will cover anything smaller than a mini DIN. Boots are sized for a particular cable and are available with either male or female threads. Boots are available for LMR-400 and 600 as well as quarter-inch and half-inch helically corrugated cables, and half-inch and 7/8-inch annularly corrugated cables. O-rings are ..."

James Clerk Maxwell on Education

James Clerk Maxwell (wikipedia image) - RF Cafe"The aim of an experiment of illustration is to throw light upon some scientific idea so that the student may be able to grasp it. ...The educational value of such experiments is often inversely proportional to the complexity of the apparatus." - James Clerk Maxwell, The Scientific Papers of James Clerk Maxwell - Vol. 2, p243, by W.D. Niven.

Honeywell Seeking a
Sr. Antenna Test Engineer

Honeywell Seeking a Sr. Antenna Test Engineer - RF CafeThe Sr. Antenna Test Engineer shall oversee and manage personnel and resources associated with supporting antenna testing and environmental testing of systems on program. Additional duties shall include: • Act as technical resource regarding testing of antennas on antenna ranges to include far field, spherical and planar near-field systems. • Develops and documents test procedures and schedules associated with conducting antenna and material testing covering a wide frequency spectrum. Analyzes test results and provides formal test reports to customer. • Develops and documents test procedures and schedules associated with conducting environmental ...

"Do Engineers Complain
Too Much About Pay?"

"Do Engineers Complain Too Much About Pay?" The Engineer - RF Cafethe Engineer, a UK website, recently did a reader poll titled "Do Engineers Complain Too Much About Pay?" It was a big hit. "We've rarely had such an emphatic response to a poll. Of the 591 readers who responded, 2/3 picked the option that engineers did not complain too much about pay and were not paid enough. Unfortunately, we can't separate out whether respondents were agreeing with both parts of the statement or only one. Of the remaining respondents, 15% thought that engineering ..."

How to Find an
Engineering Apprenticeship

How to Find an Engineering Apprenticeship, Interesting Engineering - RF Cafe"Doing an apprenticeship is a great way of having real-life work experience and getting a feel of what it's like to actually work in the industry. It is also one of the ways to avoid going to university but still getting a career you desire. If this is something you'd be interested in, continue reading! The following are top 10 tips that will help you find an apprenticeship: 1. Research is crucial! Read about all the different areas of engineering you can potentially work in, which companies take more interns in, what skills are necessary, etc. 2. Choose an area you are most interested ..."

KR Electronics Intros 8 Channel
High Frequency Multiplexer

KR Electronics Intros 8 Channel High Frequency Multiplexer - RF CafeKR Electronics announces the availability of an 8 Channel High Frequency Multiplexer, part number 3225. The contiguous multiplexer has low input VSWR across the entire band and uses selective elliptic filters for each band. Please contact KR Electronics for details ...

Ground Resistance
and Its Measurement

Ground Resistance and Its Measurement, May 1951 QST - RF CafeAn old electrician's saying goes "Ground is ground the world around," implying that every point on Earth's surface is at the same potential - specifically 0 volts. We know, of course, that it is not so. Maybe on average such a claim could be made, but just as 'sea level' is not the same at all points on the ocean's surface (hence we speak of 'mean sea level'), neither is the voltage potential the same everywhere. Further, just as the salinity of all points on the ocean surface do not have the same salinity (and thereby conductivity), the conductivity of various places on dry land vary - often significantly. Electric power systems are very concerned with soil electrical conductivity in the vicinity of power generation installations ...

Bendable Smartphone Uses
Display Made of Graphene

"As of now, graphene is too expensive to manufacture at an industrial scale, however, scientists are actively working on producing a cheaper more viable method to apply it to devices. The new smartphone displayed at the convention still lacks the standard image qualities set by LCD and OLED displays. Although the image quality may not be at par with current HD screens, the new bendable graphene touchscreen phone remains an exciting feature to look forward to when it will enable devices to be thinner, lighter, and incredibly tougher. Let us know in the comments below what you think ..."

Exploring Phosphorene as
Super Fast Semiconductor

Exploring Phosphorene as Super Fast Semiconductor - RF Cafe"Two-dimensional phosphane, a material known as phosphorene, has potential application as a material for semiconducting transistors in ever faster and more powerful computers. But there's a hitch. Many of the useful properties of this material, like its ability to conduct electrons, are anisotropic, meaning they vary depending on the orientation of the crystal. Now, a team including researchers at RPI has developed a new method to quickly and accurately determine that orientation using the interactions between light and electrons within phosphorene ..."

Quantum Filter Integrates 20,000
Josephson Junctions

Quantum Filter Integrates 20,000 Josephson Junctions - RF Cafe"Arrays containing as many as 20,000 Josephson junctions have been created by physicists at CSIRO in Australia. The devices are made from a high-temperature superconductor and operate at liquid-nitrogen temperatures. With further development, the devices could be used in a range of applications, including magnetic-field sensing and as radio-frequency antennas. The devices are called superconducting quantum interference filters (SQIFs), which are 2D arrays of superconducting interference devices (SQUIDs). A SQUID is ..."

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