Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes USAF radar shop Notable Quotes App Notes Calculators Education Engineering Magazines Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Stencils for Visio RF & EE Shapes for Word Advertising RF Cafe Homepage Sudoku puzzles Thank you for visiting RF Cafe!
RF Stencils for Visio v3.1 by RF Cafe

- Welcome to the RF Cafe Website -

"Chuck Norris can touch an asymptote.'" - Anon

Today in Science History

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

Vendors Pushing LTE for Private Wireless and Fixed Wireless Networks

• Bidding in ARRL On-Line Auction Set to Begin October 19

Japanese MNOs to Rollout 5G in 2019 a Year Ahead of Schedule

80M LoRa Technology-Enabled Devices to Be Deployed by Early 2019

• Smartphone Brand Determines Longevity

60-GHz Wi-Fi Gets a Refresh

• The Semiconductor Industry Is in Transition

Wafer Shipments Forecast to Set New Highs Through 2021

• Hutch Working on $1B Italian Towers Sale

Radar Scores SAC Bombing Test

Radar Scores SAC Bombing Test, December 1956 Popular Electronics - RF CafeMost people have heard of the incredibly accurate Norden bombsight that was credited for revolutionizing accuracy of heavy bombers like B-17s, B-25s, and B-29s. It was an electromechanical device that took bombardier inputs of altitude, airspeed, heading, and wind speed and direction, then calculated the impact point of the bomb. An accuracy of 75 feet was claimed under ideal conditions - provided by a mechanical computing device. By 1956 when this article was published, the Norden had been replaced by radar-integrated bombing systems. Additionally, ground-based radar measurement systems were

Jeff Bezos Defends Big Tech Working with DoD

Jeff Bezos Defends Big Tech Working with DoD - RF CafeHere is why government control over the U.S. taxpayer-funded development of the Internet should not be ceded - it makes us vulnerable to the whims of a few megalomaniac chieftains. "Don't expect Amazon to follow Google's lead when it comes to working with the U.S. Department of Defense. Amazon CEO Jeff Bezos made a surprise appearance at the Wired 25 conference in San Francisco on Monday. In light of Google's decision last week to pull out of a bid for the DoD's JEDI cloud computing project, he was asked about his philosophy in regard to big tech companies working with government. 'We are going to continue to support the DoD, and I think we should,' Bezos said ..."

5G Brings New RF Challenges for Handsets

5G Brings New RF Challenges for Handsets - RF CafeOpen your smartphone and count the antennas within. They take on many form factors and are often multi-band, making it difficult for the untrained eye to discern the implementation. It is a true wonder of antenna engineering. Factor in that they have to work regardless of whether being held in a hand, pressed between a shoulder and ear, or sitting in a pocket or handbag. Genius is at work there. I remember during my reverse engineering days when there were maybe three antennas in a handset. Take a look at the block diagram in this "5G Brings New RF Challenges for Handsets" MWJ article by Ben Thomas of Qorvo and note the 8 antennas depicted. How many people can pull off such a challenge? Beyond that there is RF signal switching and isolation, analog and digital processing, filtering, AGC, ALC, and other tasks ...

Washington Newsletter - Patent Rulings

Washington Newsletter - Patent Rulings, October 4, 1965 Electronics Magazine - RF CafeJust to remind you that patent laws are continually being monkeyed with by lawmakers and challenged in court by litigants, here is a news item from a 1965 issue of Electronics magazine reporting on a Supreme Court case brought by Hazeltine Research regarding their patent application for a microwave switch. Evidently over time the Supreme Court had been raising the bar on patent filings by requiring a higher degree of uniqueness for new inventions. The 1952 U.S. Patent Act, enacted by the U.S. Congress, simplified the terms of claims for new patents, thus making them easier to obtain, but according to critics, making new patents less valuable in the process. Now (in 1965), the Supreme court was moving itself back to ward the pre-1952 criteria. Judicial activism, anyone ...

ERZIA: Microwave & mm-Wave Modular Amplifiers

Many Thanks to ERZIA for Continued Support!ERZIA serves critical aerospace and defense missions by designing and manufacturing RF, microwave, and mm-wave amplifiers, integrated assemblies operating from low frequencies up to 100 GHz, and by providing high reliable satellite communications. The company was founded in 2002 to become a worldwide reference of advanced engineering, performance, reliability and ruggedness. Their catalogue of standard amplifier modules comprises more than 100 different models, having also a high capacity of customization for amplifiers and integrated assemblies. Some of products have space heritage and are used in aerospace, commercial, military and scientific systems, having a wide range of final applications ...

MU-MIMO Technology Can Increase Network Capacity up to 70%

MU-MIMO Technology Help Operators Increase Network Capacity by up to 70% - RF Cafe"Telrad Networks has announced the release of its MU-MIMO technology after completing a successful trial. The new technology is set to help operators increase capacity in a network by up to 70%, and thereby increasing subscriber connectivity rates. The new feature was tested in the trial by long-term customer Seaside Wireless Communications, a Canadian Wireless Internet Service Provider located in Nova Scotia. The company in recent times has been able to double its spectral efficiency during this trial, which meant they could add subscribers to their network within the current spectrum they already utilize. The new feature falls into an overall strategy by the company to increase capacity ..."

Mac's Radio Service Shop: The Not-So-Simple Sets

Mac's Radio Service Shop: The Not-So-Simple Sets, October 1953 Radio & Television News - RF CafeThe lesson learnt (or learned) by Barney in this Mac's Radio Service Shop saga is one that he has learned (or learnt) before, if you are an regular reader of the feature. As always, the story is a combination docudrama and tutorial concerned with troubleshooting, handing customers, giving air to some newfangled device, or instruction on circuit theory. Proprietor Mac McGregor is usually the teacher and Barney the pupil, but on rare occasions the roles are reversed. As you will see in this episode, radio and television set designers ginned up all kinds of ways to accomplish the same end objective - whether to avoid patent infringements or preferred exercising of creativity - and the nuances between them could cause no end of frustration to even highly trained and experienced troubleshooters ...

SAW/BAW New Market Entrants Offer New Approaches

SAW/BAW New Market Entrants Offer New Approaches - RF CafeSAW and BAW devices have been around for many decades. They have not always been inexpensive commodities during that time, however. When I first entered the defense electronics realm as an engineer in the late 1980's, a SAW filter in the 70 MHz band (common for IF's in the day) could easily cost $20 in volume quantities. They had high insertion losses and did not handle much power. Now, of course, SAW's are dirt cheap and have much better performance. This article titled, "SAW/BAW New Market Entrants Offer New Approaches," which appears in the October issue of Microwave Journal, reports on some new techniques being utilized by vendors ...

RF Engineer Needed by PierCon Solutions

RF Engineer Needed by PierCon Solutions - RF CafePierCon Solutions, a solid, tenured, and proven wireless consulting and engineering firm, is in need of an experienced RF Engineer. Based in Lincoln Park, NJ, PierCon is dedicated to providing world-class engineering and consulting services to our customers. PierCon is a recognized leader in the wireless designs of in-building coverage, Broadband, WiMAX/LTE, Microwave, Cellular, Public Safety, Interoperability, PCS, iDEN (ESMR), In-Building First Responder and In-Building cellular and WiFi, and interference mitigation. In this RF Engineer position you will routinely assists in zoning and testimony preparation by creating maps, summary sheets and zoning exhibits using information collected from the Client. Occasionally performs testing of new and existing cell sites test equipment. Supports investigation ...

News Flash - RF CafeMicrosoft Cofounder Paul Allen Dies at 65

Microsoft Cofounder Paul Allen Dies at 65 - RF CafeAs someone who has been a Windows user since version 2.0, I have followed Microsoft co-founders PPaul Allen and Bill Gates in the tech news for more than 3 decades. Mr. Allen, a mere 5 years my senior, died on Monday, October 15, 2018, from complications of non-Hodgkin's lymphoma. He generously end enthusiastically funded aerospace research, including in conjunction with Burt Rutan, whom I greatly admire. Looking at the included photo, it is hard to imagine we were all that young at one time. Time is a cruel master. Tempus fugit, and even a billion dollar fortune and good works cannot buy immortality. RIP, Paul Allen ...

Triad RF Systems: RF/Microwave Amplifiers and Amplifier Systems

Triad RF SystemsTriad RF Systems designs and manufactures RF power amplifiers and systems. Triad RF Systems comprises three partners (hence 'Triad') with over 40 years of accumulated knowledge of what is required to design, manufacture, market, sell and service RF/Microwave amplifiers and amplifier systems. PA, LNA, bi-directional, and frequency translating amplifiers are available, in formats including tower mount, benchtop, rack mount, and chassis mount. "We view Triad more as a technology partner than a vendor for our line-of-sight communications product line." Please check to see how they can help your project ...

The 5G Dilemma: More Base Stations, More Antennas = Less Energy

The 5G Dilemma: More Base Stations, More Antennas = Less Energy? - RF Cafe"5G networks will likely consume more energy than 4G, but one expert says the problem may not be as bad as it seems. A lurking threat behind the promise of 5G delivering up to 1,000 times as much data as today’s networks is that 5G could also consume up to 1,000 times as much energy. Concerns over energy efficiency are beginning to show up at conferences about 5G deployments, where methods for reducing energy consumption have become a hot topic. The International Telecommunication Union (ITU) has published challenging, measurable requirements on the data rates, latency, and reliability that a network needs to satisfy to be called 5G. While the ITU has also aimed for greater energy efficiency, it hasn't established any measurable goals for it ..."

Understand the System

Understand the System: JK-RS Flip-Flop, September 1971 Popular Electronics - RF CafeThe extreme level of complexity and consolidation of circuit functions in today's functional integrated circuit (IC) blocks makes it so that people with almost no instruction or experience in circuit and system design can assemble and make work some pretty impressive creations. The days of vacuum tubes and early discrete semiconductors required a designer to know how to properly bias and interface various sections of circuits and systems. Nowadays, with the ready availability of impedance-matched amplifiers, filters, mixers, couplers, detectors, and other pre-packaged components, even RF and microwave frequency systems are within the reach of relative amateurs. Likewise, people interested in digital and microprocessor circuits ...

EDI CON 2018 This Week!

EDI CON USA 2018 Announces EDI CON University - RF CafeElectronic Design Innovation Conference and Exhibition (EDI CON) USA, the industry event that brings together RF/microwave and high-speed digital design engineers and system integrators, is pleased to introduce its EDI CON University 2018 program at its event this October 17 and 18 at the Santa Clara Convention Center. These 2-hour sessions offer in-depth training in a particular topic, such as MIMO Test, Amplifier Design, and Measuring Impedance. All conference pass holders are eligible to attend, but pre-registration happens during the registration process. After attending an EDI CON University course, attendees can earn IEEE Continuing Education Unit/Personal Development Hour ...

R&S Educational Note: Understanding the Basics of Signal Generation

Rohde & Schwarz: Understanding the Basics of Signal Generation - RF CafeRohde & Schwarz USA (R&S USA) has produced an Educational Note titled, "Modulation and Signal Generation with R&S® Signal Generators." Signal generators play a vital role in electrical test and measurement; however, choosing the right one often requires a look beyond the banner specs. This application note does exactly that. How do analog-, vector- or arbitrary signal generators work? What are the parameters to look at? What important information is not obvious from the datasheet? And how do I generate a modulated signal? Download this application note and find out more about: What a Signal Generator is and why you need one What types of Signal Generators ...

Russia Electronics Market

Russia Electronics Market, December 27, 1965 Electronics Magazine - RF CafeThis is the electronics market prediction for Russia, circa 1966. It was part of a comprehensive assessment by the editors of Electronics magazine of the state of commercial, military, and consumer electronics at the end of 1965. Then, as now, Russian electronics products are not considered to be serious competition to U.S. markets. For that matter, when is the last product of any type you bought with a "Made in Russia" stamp on it? Even though the Soviet Iron Curtain fell in 1992, very little progress has been made with mending fences with them. Unless you can find a news story on the state of the industry, detailed reports must be purchased from research companies ...

RF & Connector Technology: Coax Connectors, Cable, Passive Components

RF & Connector Technology - RF CafeProviding full solution service is our motto, not just selling goods. RF & Connector Technology has persistently pursued a management policy stressing quality assurance system and technological advancement. From your very first contact, you will be supported by competent RF specialists; all of them have several years of field experience in this industry allowing them to suggest a fundamental solution and troubleshooting approach. Coaxial RF connectors, cable assemblies, antennas, terminations, attenuators, couplers, dividers, and more. Practically, we put priority on process inspection at each step of workflow as well as during final inspection in order to actualize "Zero Defects ..."

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

Engineering Job Board - R 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 (of course a gratuity will be graciously accepted). 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 ...

Optical Fiber-Based Electron Gun to Reveal Atomic Motions

Optical Fiber-Based Electron Gun to Reveal Atomic Motions - RF Cafe"One of the most enduring 'Holy Grail' experiments in science has been attempts to directly observe atomic motions during structural changes. This prospect underpins the entire field of chemistry because a chemical process occurs during a transition state - the point of no return separating the reactant configuration from the product configuration. What does that transition state look like and, given the enormous number of different possible nuclear configurations, how does a system even find a way to make it happen? Now in the journal Applied Physics Letters, researchers at the Max Planck Institute for the Structure and Dynamics of Matter ..."

Semiconductor Quiz

Semiconductor Quiz, February 1967 Popular Electronics - RF CafeOut of the nearly half a hundred quizzes I have posted from vintage Popular Electronics magazines, this Semiconductor Quiz that appeared in a 1967 issue is the first I can remember that was not created by Robert P. Balin. A fellow named Warren Todd made it. If you are younger than maybe 50 years old, symbols B and I might stump you, but the rest are still pretty common. Some of the labels (names) presented in the quiz are a little outdated so I have identified the abbreviations for you. That will make things much easier. For example, SBS is a silicon bidirectional switch. Bonne chance ...

Author: Kirt Blattenberger on Google+ Author:
Kirt Blattenberger

Triad RF Systems Triad RF Systems
About RF Cafe
Kirt Blattenberger - RF Cafe Webmaster
Copyright: 1996 - 2018
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.

My Hobby Website:  AirplanesAndRockets.com

spacer