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- RF Cafe Homepage -
RF, Microwave, Wireless, Cellular, Radar, Satellite, & Analog Engineering

Today in History - 1839: Chocolate maker George Cadbury was born. 1843: Gustave-Gaspard Coriolis, who discovered the differential circulation effect that bears his name, died. 1876: Inventor Melville...

Tech Headline News

-  Archives -

Apple to No Longer Unlock Most iPhones, iPads for Police

Asia-Pacific IC Usage Domination Growing

Science Fiction Writers Take a Rosier View

Microsoft Announces Windows 9 Event on Sept. 30

'Interceptor' Cellphone Towers Found Near White House, Senate

FCC Turns Down Petition to Create a 4 Meter Band in the U.S.

Mg Box Phone Battery Runs on Water, Magnesium

U.S. Military Contractors 'Hit by Chinese Hackers'

After Hacks, Transcom to Require Contractors to Report Data Breaches

Study: Cities with Super Fast Internet Are More Productive

Peregrine Launches 18 GHz UltraCMOS SP4T RF Switches

Companies' Stock Buybacks at Biggest Pace Since 2007

Number of Billionaires Hits Record High in 2014 (while my saving account gets 0.6%)

Semi Equipment Spending Shows Strong Growth for 2014, 2015

Scottish Scientists Make Breakthrough in Water-to-Hydrogen Production

Scientists Twist Radio Beams to Send Data

First Formula E Race Shockingly Electrifying

New Device to Catch Texting Drivers

Twisted Graphene Chills Out

Are Cell Phones Really Giving Us Cancer?

Consumers Expect Full in-Car Connectivity

A Zero-Friction Quantum Engine

Venture Capitalist Sounds Alarm on Startup Investing

Finally... Proof That Communism Works !!!

Finally... Proof That Communism Works !!! - RF Cafe...as long as Capitalism is allowed to flourish. I know, the claim is a non sequitur, and today's Alibaba IPO is an ipso facto example. At the time of this writing, Jack Ma is worth $17.5B. Mr. Ma is a citizen of Communist China, where Chairman Mao, murderer of millions, is still idolized and his governmental tenets are still followed. Xinhua News Agency headline: "Alibaba's IPO to End US Dominance in Technology Sector." This comes as welcome news to many members of the U.S. Congress and political appointees who have publically and repeatedly cursed Capitalism...

Short Waves of Tomorrow

Short Waves of Tomorrow, January 1938 Radio Craft - RF CafeHugo Gernsback, in 1938, lampooned his contemporaries who boldly declared that by then there was nothing left to be invented regarding radio equipment for short wave communications. Wisely citing the well-known instance of a patent examiner who quit his post in 1870 because, as the man put it, all useful things had been invented and there was nothing meaningful left to patent, Mr. Gernsback challenged his readers to keep this article for 25 years and then go back and read it while being aware of all the new and wonderful short wave devices that had been invented since 1938...

RF Design/Wireless Position Available at Kenall

Electrical Engineer, RF Design/Wireless Position Available at Kenall - RF CafeThe successful electrical engineer candidate will be responsible for the development and design of wireless control systems which will be used in Kenall lighting, emergency and signage products. The Ideal candidate will have experience using WLAN, ZigBee, Bluetooth, low-voltage control and switching circuits. Kenall products are proudly manufactured in the USA.

Many New Titles Added to Book Drawing List

Electronic Warfare Receivers and Receiving Systems - RF CafeSatellite Communication Ground Segment and Earth Station Handbook - RF CafeUltrawideband Antennas for Microwave Imaging Systems - RF CafeAdvances in Statistical Multisource-Multitarget Information Fusion - RF CafeThanks the incredible generosity of Artech House publishers, there are now many new engineering books available for selection to the monthly RF Cafe Book Drawing winners. The four shown here are among seven new titles.

Carl & Jerry: Electronic Detective

Carl & Jerry: Electronic Detective, February 1958 Popular Electronics - RF CafeLong before their college days at Parvoo U., our two amateur electronics sleuthing buddies were on the job tracking down and trapping bad guys by using their combined knowledge of circuits and physics. In this episode, Carl and Jerry are tasked with helping a hobby store owner stop a rash of thefts that always seems to occur during a busy time right after school lets out for the day. Their first inclination was to devise a system like the big department stores were installing that used passive tags on items that would trigger an...

everythingRF Updates Cable Assembly Builder

everythingRF Updates Cable Assembly Builder Tool - RF Cafeeverything RF has updated its Cable Assembly Builder tool to help users get quotations from over 25 manufacturers at one go. Users can specify their requirement and select the manufacturers from whom they would like to get a quotation. The tool has been optimized for mobiles, tablets and desktops allowing users to access this from anywhere. Try it out.

Applications Engineer Needed by Empower RF

Applications Engineer Needed by Empower RF Systems - RF CafeEmpower RF Systems is looking for an Applications Engineer. Key responsibilities and deliverables include: Partner with sales, engineering, business development, and executive management to identify and close on power amplifier solutions for key markets and customers. Provides sales personnel with technical support for the promotion and positioning of existing and new products. Responsible for inputs to marketing plans, development of sales tools, and selected, web content preparation. Provides customer feedback to improve existing products...

Notable Tech Quote

1 to the 4th Power Amplification in Star Trek Episode - RF Cafe"By installing a booster we can increase that capability on the order of one to the fourth power." - Captain James T. Kirk, Commander of the Star Ship Enterprise. While Melanie and I were watching the Star Trek original television series episode titled "Court Martial," I picked up on a funny technical faux pas. Kirk is accused of the negligent death of a crew member with whom he has had a longtime difficult relationship. Believing that the man is faking his own death to incriminate him, Capt. Kirk has the ship's auditory sensors boosted...

Radio WittiQuiz

Radio Wittiquiz, October 1938 Radio Craft - RF CafeMixing a little fun with learning has always been a good motivation for students. I have written in the past about a particular electronic circuits professor I had that liked to play practical jokes during lessons and exams. Including gag options on a multiple choice test is a great way to inject a bit of tension-easing levity while at the same time eliminating one or more opportunities to guess at a wrong answer (although no relief for the truly clueless). I sometimes do that on the RF Cafe Quizzes that I generate. Radio Craft printed a large bunch of such quiz questions under the title "Radio WittiQuiz...

Microwave Engineering Crossword for 9/14/2014

Microwave Engineering Crossword Puzzle for September 14, 2014 - RF CafeTake a break from the drudgery by trying your hand at some of these goodies. Every word in the RF Cafe crossword puzzles is specifically related to engineering, mathematics, and science. There are no generic backfill words like many other puzzles give you, so you'll never see a clue asking for the name of a movie star or a mountain on the Russia-China border.

Inc. 500 (2014) CEOs Describe 1st Year in Business

Inc. 500 (2014) CEOs Describe First Year in Business - RF CafeIt is well known that the vast majority of start-up businesses fail in the first year and a half. Inc. magazine's new survey of their Inc. 500 CEO member list shows that often even highly successful start-ups initially suffered from the same types of problems that failures did - undercapitalization, poor leadership, bad market timing, failed product or service rollout, difficulty finding and retaining skilled employees, poor fiscal discipline, and the list goes on. 45% claim not enough money at the outset was the biggest issue. A bad fit with key employee(s) and business partner(s) was a close second at 32%. There was no "I was just stupid at first" category, but if there was...

Radio Service Data Sheets

Philco Model 200-X Radio Service Data Sheet, December 1934 Radio Craft - RF CafeAdmiral "Aeroscope" Models 161-5L, 162-5L and 163-5L Midget Set Radio Service Data Sheet, August 1939 Radio Craft - RF CafeAt least for now, I am going to only scan and post Radio Service Data Sheets like these featuring the Philco Model 200-X, the Knight (Allied Radio Corp.) E10716 Battery Portable, and Admiral "Aeroscope" Models 161-5L, 162-5L and 163-5L Midget Set in graphical format, rather than run OCR on them to separate the textual content. There are still many people who restore and service these vintage radios, and often it can be difficult or impossible to find schematics and/or tuning information...

Terry Butman Joins Honored Radar Tech List

Terry Butman, USaF Radr Technician, AN/MPN-13/14 - RF CafePlease welcome MSgt. (ret) Terry Butman as the newest member of the prestigious USAF Radar Technician Hall of Fame (unofficial, though, it is). Terry recently contacted me with his 20+ years of service information. Although not in a mobile communications group, Terry spent most of his career working on mobile radars like the MPN-13, MPN-14, and CPN-4. BTW, original manufacturer ITT Gilfillan's radar division now goes under the name Exelis.

Congrats to Book Winner Wouter U.!

Understanding Quartz Crystals and Oscillators - RF CafeCongratulations to Wouter U., of The Netherlands, for being one of two winners in the August RF Cafe book drawing. Wouter selected Understanding Quartz Crystals and Oscillators, by Ramon M. Cerda. I pay shipping so it costs the lucky winners nothing. Graciously provided by Artech House

Comics with the Potential to Make You Laugh!

Comics with the Potential to Make You Laugh! - RF CafeThere is a plethora of comics with just about any theme on the Internet: electronics, physics, mathematics, finance, amateur radio, sports, and politics, to name a few. I could provide pages full of replications for your enjoyment, but one of the best ways to sample available comics for personal consumption and/or use in reports, presentations, etc., is to use the Search function on a website like CartoonStock. The above thumbnail image is a great example of an electronically-themed comic. In it, the anatomically correct mother, father, and son socket and plug family have the inscription, "Sparky! Your mother and I are shocked at your current behavior...

Thanks to LadyBug for Continued Support

LadyBug TechnologiesLadyBug LB480A Power Sensor - Small SizeLadyBug Technologies manufactures the PowerSensor™ line of miniaturized USB RF & microwave power sensors. LadyBug manufactures high accuracy average, pulse, and pulse profiling sensors with GUI interfaces covering up to 26.5 GHz and 80 dB dynamic range. These sensors set a, patented industry standard, No Zero/No Cal technology. There is no need to disconnect or wait for internal zeroing and calibration.

Decoding the Heavens: Antikythera Mechanism

Decoding the Heavens: A 2,000-Year-Old Computer - and the Century-long Search to Discover Its SecretsDecoding the Heavens: A 2,000-Year-Old Computer - and the Century-long Search to Discover Its Secrets, by Jo Marchant. Discovered a century ago in an ancient Mediterranean shipwreck, the Antikythera mechanism instantly attracted scientific interest. It had gears, which was and remains unique among artifacts from Greco-Roman civilization. So begins Marchant's mystery about the object, a tale that ends in triumph but not before inveigling individuals who not only puzzled over the device but also became obsessively devoted to figuring it out. Tantalized by the Antikythera mechanism, scholar Derek de Solla Price felt it was the clue with which he could...

The Mystery Set

The Mystery Set, December 1934 Radio Craft - RF CafeIn the 1930s, electricity and electronics were mysteries to most of the population. The concepts were relatively new and few had a firm grasp on the technology. That reality was exploited by Hugo Gernsback during the 1934 Electrical Exposition to challenge attendees to discover how the radio receiver sitting on the top of an empty, clear glass case was being powered. It was a clever ruse that reportedly stumped most people. The secret is revealed here. BTW, my guess is that an even smaller proportion of our current citizens would be able to figure it out, or for that matter...

September 2014 Newsletter from Anatech

Anatech Electronics Newsletter for September 2014 - RF CafeAnatech Electronics, a manufacturer of RF and microwave filters, has published its September 2014 newsletter. As always, it includes both company news and some tidbits about relevant industry events, regulations, and standards. This month, Sam Benzacar offers his views on the subject of "Interference to Defense Systems: Tough Challenges Require Unique Solutions." There are also a couple headlines on an iPhone-based radar app, military small cell spending, and stealth wind turbines.

Handy-Dandy Engineering Career Advice Articles

Handy-Dandy Engineering Career Advice Articles - RF CafeI like the title of the first article listed in this week's group of career advancement resources. While it is true that some interviewers' questions appear dumb to you, it might just be that he/she has a good reason for phrasing in a particular way to see how you handle vague concepts. Or, it really might be the interviewer is lame, and that is a warning to what it would be like working for/with him/her ;-)

Smart Answers to Stupid Interview Questions
The 10 Excuses of Highly Unproductive People
What to Do If Your Boss Is a Micromanager
4 Salary Negotiation Secrets for Women
Your Newest Employees Are Your Most Vulnerable
7 Things Successful Young Careerists Do Every
   Day

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RF Cascade Workbook is a very extensive system cascaded component Excel workbook that includes the standard Gain, NF, IP2, IP3, Psat calculations, input & output VSWR, noise BW, min/max tolerance, DC power cauculations, graphing of all RF parameters, and has a graphical block diagram tool. An extensive User's Guide is also included. - Only $35.
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