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About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2016
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 Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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Today in Science History

Popular Electronics: Transistor Topics 

Transistor Topics, January 1956 Popular Electronics - RF CafePopular Electronics magazine ran their "Transistor Topics" column for many years, and this is the third in the series. Unfortunately, I do not yet have the previous two editions, but someday... Transistors were a relatively new phenomenon at the beginning of 1956, so there was a lot to learn and a lot of people to teach about them. It might have been easier to make converts of dedicated tube users if the JFET had been commercialized before the BJT, since the JFET (voltage on the gate controls current flow) acts more ...

Jobs: RF Specialist Needed by Philips Lighting

RF Specialist Needed by Philips Lighting - RF CafeYou know it's a new world when lighting companies are hiring RF engineers to design and qualify wireless 'personal lighting' products. In the EMC & Wireless Connectivity lab, you will RF Specialist Needed by Philips Lighting - RF Cafecontribute to the Internet-Of-Things strategy of Philips Lighting; e.g., by co-creating the next generation of the Philips HUE lamps. You will support multiple departments of Philips Lighting to efficiently test and design the wireless connectivity part of their products and systems ...

New 'Amateur Radio Parity Act' Bill Introduced in U.S. House

New 'Amateur Radio Parity Act' Bill Introduced in U.S. House - RF Cafe"H.R. 555 - a new 'Amateur Radio Parity Act' bill - has been introduced in the U.S. House of Representatives. The bill’s language is identical to that of the 2015 measure, H.R. 1301, which passed in the House late last summer but failed in the waning days of the US Senate to gain the necessary support. As with H.R. 1301, the new measure introduced on January 13 in the 115th Congress was sponsored by Rep. Adam Kinzinger (R-IL), with initial co-sponsorship by Rep. Joe Courtney (D-CT) and Rep. Greg Walden, W7EQI (R-OR). Walden now ..."

Modular Clean Rooms by Panel Built

Modular Clean Rooms by Panel Built - RF CafePanel Built is a manufacturer of modular enclosures. Their Class 1,000, 10,000, and 100,000 modular clean rooms feature standard hidden in-wall air chase, filtered air-return louver, ducting for FFU, and adjustable door louver. Options include HEPA and ULPA filters, single package air-conditioning, 'Sticky Mats' to keep dirt and grim from entering, air curtains, high speed roll-up doors, and entrance air-locks. Panel Built has been added to my hand-selected list of vendors on the Clean Rooms page. They also make towers.

Editorial: Should We Change the Way We Elect Our Presidents?

Editorial: Should We Change the Way We Elect Our Presidents?, April 29, 1950, The Saturday Evening Post - RF CafeIt has been said that most people's historical perspective begins at the year they are born. Hence, they might believe whenever something 'new' happens, it is the first time. This past U.S. election and the ensuing talk over the electoral system is a good example. Dig this editorial from a 1950 issue of The Saturday Evening Post. Concern over the results of the very close 3-way race in the 1948 U.S. presidential election between Truman, Dewey, and Thurmond had pundits pontificating and bloviating about the merits of the electoral system ...

Amazon to Run Secret Wireless Trials

Amazon to Run Secret Wireless Trials - RF Cafe"Amazon is preparing to test experimental wireless communications technology, including mobile devices and fixed-base stations, in rural Washington and Seattle, the company disclosed in government filings this week. The filings do not specify what the tests would be for, but they hint at a new type of technology or wireless service, noting that the project would involve prototypes designed to support "innovative communications capabilities ..."

Sketching out Magnetism with Electricity

Sketching out Magnetism with Electricity - RF Cafe"In a proof-of-concept study, researchers drew magnetic squares in a nonmagnetic material with an electrified pen and then 'read' this magnetic doodle with X-rays. In the experiment, the scientists moved the electric tip along the surface and applied a positive voltage. The electric field aligns the spins of the electrons in the nonmagnetic material, and the ordering creates magnetic properties. If the voltage is ..."

They Are Televising in Berlin!

They Are Televising in Berlin!, January 1935 Short Wave Craft - RF Cafe"Inventor of the television. For over 80 years, Loewe has invented television, we have kept our 'Made in Germany' promise. Development, production and service departments are still based in Kronach." So reads the history page on the Loewe website regarding its involvement since 1923. This article, which appeared in a 1935 issue of Short Wave Craft, begins by lamenting America's lag in the development of commercial television; to wit, "practical public television is fast asleep in this country." The German system ...

everything RF Spectrum Analyzer Search

everything RF announces a newly implemented search filter for finding a spectrum analyzer with the features you need. Selectable parameters include manufacturer, type, price, frequency range, resolution bandwidth, etc. everything RF provides the only searchable product database for the RF & microwave industry, and currently lists 191,634 products from over 875 companies in 229 categories ...

5G Economy Report Gauges $Trillion Impacts

5G Economy Report Gauges $Trillion Impacts - RF Cafe"5G cellular could have a bigger economic impact than expected, according to an IHS study sponsored by Qualcomm. The report comes at a time when carriers are racing to test 5G prototype products and standards are still in development. 5G could enable as much as $12.3 trillion in goods and services in 2035 when its full effects are realized, the 5G Economy report said. By that time, companies developing 5G products and services could generate $3.5 trillion in revenue and 22 million jobs. The so-called 5G ..."

EDI CON USA Announces 2017 Conference Chairs

EDI CON USA Announces 2017 Conference Chairs - RF CafeEDI CON USA 2017, an event that brings together engineers working on high-frequency analog and high-speed digital designs, will take place at the Hynes Convention Center, September 11-13 in Boston, MA. The event management team is pleased to announce this year's conference chairs: Thomas Cameron, CTO for the Communications Business Unit at Analog Devices Inc. will serve as the chair for the high-frequency subject areas, and Istvan Novak, Senior Principal Engineer at Oracle, will serve as the chair for the high-speed digital areas of the conference ...

Successful Iridium Satellite Launch for SpaceX

Successful Iridium Satellite Launch for SpaceX - RF Cafe"SpaceX’s Falcon 9 rocket climbed into orbit from California's Central Coast on Saturday, resuming service after an explosive setback last year and delivering much-needed reinforcements to Iridium's satellite constellation providing communications by land, sea and sky. The comeback mission kicks off a busy launch manifest with more than 20 SpaceX rocket flights expected this year as the company prepares to start launching astronauts, vital national security payloads and a slate of valuable telecommunications satellites for global broadcasters and network clients. The 229-foot-tall ..."

E-waste in East and Southeast Asia up 63% in 5 Years

E-waste in East and Southeast Asia up 63% in 5 Years - RF Cafe"The volume of discarded electronics in East and Southeast Asia jumped almost two-thirds between 2010 and 2015, and e-waste generation is growing fast in both total volume and per capita measures, new UN research shows. Driven by rising incomes and high demand for new gadgets and appliances, the average increase in e-waste across all 12 countries and areas analyzed—Cambodia, China, Hong Kong, Indonesia, Japan, Malaysia, Philippines, Singapore ..."

Stage 4 of FCC's Incentive Auction Clearing Cost Plummets to $10B

Stage 4 of FCC's Incentive Auction Clearing Cost Plummets to $10B  - RF Cafe"Stage 4 of the reverse portion of the FCC’s incentive auction ended Friday, with TV broadcasters setting a clearing cost of just more than $10 billion for up to 84 MHz of airwaves, falling dramatically short of the $40.3 billion set in Stage 3 and marking a tiny fraction of the $86 billion set in Stage 1. On the plus side, the auction may not slog on much longer. 'Broadcasters were really suicidal,' Tim Farrar of TMF Associates tweeted Friday ..."

Webinar: Analog Beamforming

Analog Beamforming Webinar - RF CafeTitle: Analog Beamforming - What Is It and How Does It Impact Phased-Array Radar and 5G? Date: Tuesday, January 24, 2017 Time: 2:00 PM Eastern Standard Time Duration: 1 hour. "As 5G communication systems are rolled out and phased-array radar spreads its reach to non-military applications, our industry has taken a keen interest in beamforming. This technical webcast will dive into everything you want to know about beamforming systems - typical uses, digital versus analog, nulling ..."

Small Laser Weapons Eyed for Combat Aircraft

Small Laser Weapons Eyed for Combat Aircraft - RF Cafe"U.S. military researchers are asking for industry's help in developing compact, fiber laser diode modules suitable for pumping high power fiber laser weapons on a variety of manned and unmanned combat aircraft and tactical land vehicles. Officials of the U.S. Defense Advanced Research Projects Agency (DARPA) in Arlington, Va., have released a solicitation for the Efficient Ultra-Compact Laser Integrated Devices (EUCLID) project. High-energy laser (HEL) ..."

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

Hamvention Ready to Deal with Anticipated Traffic Flow at New Venue

Antitrust Suit Against Apple Can Move Forward

Obama Last-Minute Spy Law Could Reignite Safe Harbour Debate

Flame Retardant in Li-Ion Batteries Could Quench Fires

Sweden's SAQ Alexanderson Alternator Station Reports 'Successful' Christmas Transmission

FCC Fines Pirate FM Operator $25k (the guy is a dope)

GaAs Component Market to Grow >4% to $9.13B in 2021

British Military Contracts for 1st Laser Weapon in Mid 2020s

TSMC Expects Flat Year for Foundry

Memo to Tech Professionals: Ask for a Raise in 2017

Memo to Tech Professionals: Ask for a Raise in 2017 - RF Cafe"At least one-third of tech workers are significantly underpaid. That's the conclusion of a study by Paysa, a startup that markets tools designed to help software engineers and other technology professionals analyze and compare salaries and benefits. Paysa looked at 5 million resumes of technology professionals and concluded that nearly 2 million of them are currently underpaid by 10% or more. For an average software engineer making $112,000, the company indicated, that translates into $11,200 a year of missing income. It's probably a good time ..."

Oxfam: 8 Men as Rich as 1/2 the World

Oxfam: 8 Men as Rich as 1/2 the World - RF Cafe"Oxfam's report, An Economy for the 99 Percent, shows that the gap between rich and poor is far greater than had previously been estimated and details how big business and the super-rich are fueling the inequality crisis by dodging taxes, driving down wages and using their power to influence politics. The report also calls for a fundamental change in the way we manage our economies so that they work for all people, and not just a fortunate few ..." 3/4 of them are communications / computer moguls: Zuckerberg, Bezos, Gates, Helu, Ellison, Bloomberg.

Practical Electronics for Inventors, 4th Edition

Practical Electronics for Inventors, 4th Edition - RF CafeA Fully-Updated, No-Nonsense Guide to Electronics. Advance your electronics knowledge and gain the skills necessary to develop and construct your own functioning gadgets. Written by a pair of experienced engineers and dedicated hobbyists, Practical Electronics for Inventors, 4th Edition, lays out the essentials and provides step-by-step instructions, schematics, and illustrations. Discover how to select the right components, design ...

Ulrich Rohde, N1UL, Recognized for Pioneering Work on SDR

Ulrich Rohde, N1UL, Recognized for Pioneering Work on SDR - RF CafeThis guy is a modern-day RF superstar in both the professional and Ham radio worlds. "Ulrich L. Rohde, N1UL, of Synergy Microwave Corp was invited to deliver the sixth Sir J.C. Bose Memorial Lecture at the IEEE Hyderabad Section on December 2 during a joint session of the IEEE MTT, AP, and EMC Societies in Hyderabad, India. Rohde's talk was 'Next Generation Networks: Software Defined Radio - Emerging Trends.' While working under a US Department of Defense contract at RCA in 1982, Rohde's department developed the first SDR, which ..."

Navy Fast-Tracks Sea Hawk EW Sensor

Navy Fast-Tracks Sea Hawk EW Sensor - RF Cafe"To provide better sea-surface electronic warfare (EW) capability, Lockheed Martin is adding enhanced sensors to MH-60 Sea Hawk helicopters. The company is developing an EW pod for both MH-60 R/S Sea Hawk versions to help provide anti-ship missile defense as part of Lockheed's Surface Electronic Warfare Improvement Program (SEWIP), said Joe Ottaviano, EW director at Lockheed. Called the Advanced Offboard Electronic Warfare (AOEW) system, the airborne sensor and links will ..."

ARRL Warns Illegal Drone Transmitters Could Interfere with ATC

ARRL Warns Illegal Drone Transmitters Could Interfere with Air Traffic Control - RF Cafe"In what it calls an 'extremely urgent complaint' to the FCC, ARRL has targeted the interference potential of a series of audio/video transmitters used on unmanned aircraft and marketed as Amateur Radio equipment. In a January 10 letter to the FCC Spectrum Enforcement Division, ARRL General Counsel Chris Imlay, W3KD, said the transmitters use frequencies intended for navigational aids, air traffic control radar, air route surveillance radars, and global ...

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