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!
MECA Electronics

- Welcome to the RF Cafe Website -

"That's one small step for [a] man, one giant leap for mankind" - Neil Armstrong

Today in Science History

Tech Industry Headlines

Tech Industry Headlines - RF Cafe- Archive -

Amateur Radio at 2019 EAA AirVenture in Oshkosh

Chips Fueled Armstrong's Giant Leap

• DARPA Updates $1.5B Electronics Resurgence Initiative

ITU Accepts EURAO as Sector Member

• EC Fined Qualcomm €242M for Having Superior 3G Baseband Chipsets

• SK Telecom 1st to Intro 5G Roaming

SATCOM Equipment Market for Space Worth $7.0B by 2025

• Germany Makes 700 MHz Frequency Band Available for 5G Rollouts

• Sprint Touts Launch of "True 5G" Across Chicago

Anatech Electronics: Off-the-Shelf and Custom RF & Microwave Filters

Anatech Electronics logo - RF CafeAnatech Electronics (AEI) manufactures and supplies RF and microwave filters for military and commercial communication systems, providing standard LP, HP, BP, BS, notch, diplexer, and custom RF filters, and RF products. Standard RF filter and cable assembly products are published in our website database for ease of procurement. Custom RF filters designs are used when a standard cannot be found, or the requirements dictate a custom approach. Sam Benzacar's monthly newsletters address contemporary wireless subjects. Please visit Anatech today to see how they can help your project succeed. 

Silent Sound

Silent Sound, June 1955 Popular Electronics - RF CafeThis article from a 1955 issue of Popular Electronics discusses the state of the art of ultrasonic transducers and equipment that uses them. Amazingly, of all the applications that are mentioned, one is glaringly missing. Author Louis Garner, Jr., mentions using ultrasonic transducers for measuring material thickness, detecting flaws on and within materials and assemblies, cleaning by ultrasonic scrubbing, soldering*, and motion detection for security systems. The missing items of course is sonar (sound navigation and ranging). The U.S. Navy was using sonar during World War II, although it had been in development a couple decade earlier - similar to radar's evolution. 15 - 20 kc (kHz) frequencies were typical in the day. Modern ultrasonic cleaners use up to 40 kHz, and high resolution sonars run into the low MHz. Oh, also missing is ultrasound imaging like what is used for prenatal and other internal ...

CMT Announces Strategic Relationship with NI

Copper Mountain Technologies Announces Strategic Relationship with National Instruments - RF CafeCopper Mountain Technologies is pleased to announce their strategic relationship with National Instruments. This exclusive collaboration will bring world-class VNA performance and speed to National Instruments' PXI solution. National Instruments is set to release the Copper Mountain Technologies PXIe-S5090 9 GHz 2-Port VNA in August of 2019. National Instruments will be the exclusive channel for purchasing Copper Mountain Technologies' PXI compatible VNAs. This solution brings National Instruments' users access to a metrology-grade VNA and allows Copper Mountain Technologies to expand the solutions it provides for manufacturing and production ...

R & S Test & Measurement Newsletter - July 2019

Rohde & Schwarz Test & Measurement Newsletter - July 2019 - RF CafeWe've gathered our latest content and opportunities to connect for you. We hope you'll enjoy the information and join us at a face-to-face event soon! Topics in this month's Test & Measurement Newsletter include: Comparison of Time Domain & Stepped Frequency Scans in EMI Test Receivers, Phase Noise of Clock and LO Components in 5G Base Stations, The Importance of Accurate S-Parameters for PAM-4 Applications. and Product Highlight: R&S FSVA3000 Signal and Spectrum Analyzer ...

Field-Effect Transistor Circuits

Field-Effect Transistor Circuits, May 1967 Electronics World - RF CafeIf you are just entering the field of electronics, the concepts presented in this half-century-old article for basic field effect transistors are still relevant. Significant improvements have been made since then, but the fundamentals stand. One of the most useful items in this article is Table 1, which compares and contrasts vacuum tubes, bipolar junction transistors, and field effect transistors. Topics covered include general properties of FETs, source followers (a la emitter followers in BJTs), common source amplifiers (a la common emitter amplifiers in BJTs), the Miller oscillator, combinations of FETs and BJTs, and a gated amplitude modulator ...

USAF Microwave Weapon Named "Thor" Can Kill Drones

USAF Microwave Weapon Named "Thor" Can Kill Drones - RF Cafe"Scientists from the Air Force Research Laboratory at Kirtland Air Force Base have created a new type of microwave weapon that can take down drones. Using an inaudible and invisible magnetic wave, the high-powered device could prove a powerful weapon against drones and other unmanned devices. Known as the Tactical High Power Microwave Operational Responder - or THOR for short - the device cost around $15M to make and is capable of taking out multiple drones at a time. THOR was created over a period of 18 months as the need to protect the American military from drones has rapidly increased over time ..."

Res-Net Microwave: Precision RF & Microwave Components

Res-Net Microwave componentsRes-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. Please check out Res-Net Microwave's website to see how they can help with your current project.

Engineering & Science Crossword Puzzle for July 21

Engineering & Science Crossword Puzzle July 21, 2019 - RF CafeUnlike all of the other engineering and science-themed crossword puzzles I have ever seen, every word and clue - without exception - in these RF Cafe puzzles has been personally entered into a very large database of relevant terms. The list has been built over nearly two decades of creating these crossword puzzles. Let me know if you would like a custom crossword puzzle built for your company, school, club, etc. (no charge). These custom-made engineering and science-themed crossword puzzles are done weekly for the brain-exercising benefit and pleasure of RF Cafe visitors who are fellow cruciverbalists. The jury is out on whether or not this type of mental challenge helps keep your gray matter from atrophying in old age, but it certainly helps maintain your vocabulary and cognitive skills at all ages. A database of thousands of words has been built up ...

A Question of Semantics

A Question of Semantics, October 1970 Popular Electronics - RF CafeJust as you will never get everyone to agree on who was the first person to successfully fly a powered aircraft (Wright, Whitehead, Curtiss, etc.), there will never be a consensus on who invented the radio. Most people would probably agree that it was Guglielmo Marconi, but this author makes a case for none other than Thomas Edison. I don't recall ever hear anyone making that claim before, but before you dismiss the opinion, read on...

Gore Products Made It to the Moon

Gore Products Made It to the Moon - RF CafeMost people working in the RF and microwave realm are familiar with Gore coaxial cable and shielding products. They have been around since 1958 - the year of NASA's birth (and mind, BTW). You might be interested in the story of Gore's many contributions the space program. From their webpage: "Gore Space Facts: Gore has provided highly reliable wire and cable solutions for the space industry since its start over 60 years ago. In fact, Gore began prototyping designs for fluorocarbon insulated wires and ribbon cables for use in space vehicles. In 1958, the same year NASA was established Gore began. Gore products have a 100% failure-free flight record. Gore has been a part of more than 100 spaceflight programs ..."

Apollo 11 Factoids: The Moon Has a Smell & What If the LM Return Had Failed?

The Moon Has a Smell - RF CafeOne of the most interesting things I remember about what we learned from the Apollo program is that the moon has a smell. Upon removing their helmets after the moon walk, Neil Armstrong remarked, 'We were aware of a new scent in the air of the cabin that clearly came from all the lunar material that had accumulated on and in our clothes.' Buzz Aldrin described it as 'the smell in the air after a firecracker has gone off.'

Apollo Program Abort Planning - RF CafeDid you ever wonder what would have transpired if the lunar module (LM) rockets had failed to fire for a return to the orbiting Command Module (CM)? Read "In the Event of Moon Disaster" that was prepared for President Nixon to broadcast to the world if the unthinkable happened. Of course NASA had all potential scenarios covered in their Abort Planning document, complimented by extensive scenario training. Some fools wanted to shut off communications with the LM to prevent a record of Armstrong and Aldrin panicking which, of course, would never have happen with the two seasoned professional military aviators.

!!! 20 Years of RFCafe.com !!!

Vintage RF Cafe Website Screen CaptureToday, July 19, 2019, marks the 20th year of existence for RFCafe.com. It was on this date in 1999 that I registered the domain name (and the .net version) with Network Solutions, which was the only domain name registrar at the time. RF Cafe really 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 editors; in fact, my early pages were written using Notepad ...

Custom MMIC's the 2019 Women in Engineering Scholarship Recipients

Custom MMIC Announces the 2019 Women in Engineering Scholarship Recipients - RF CafeCustom MMIC, a leading designer and manufacturer of high performance monolithic microwave integrated circuits (MMICs), is proud to present its annual Women in Engineering Scholarship Award to three accomplished and deserving young women who personify academic excellence in the fields of math, science and engineering. The three recipients for 2019 are: Lillian Geller (Westford Academy), Ananya Gopalan (Chelmsford High School) and Lina Abu-Absi (Groton-Dunstable Regional High School). These candidates were carefully selected from a large group of well-qualified and thoroughly impressive applicants from the three target high schools in towns near Custom MMIC's facility ...

Straightening of Single-Molecule Conductors to Improve Performance

Straightening of Single-Molecule Conductors to Improve Performance - RF Cafe"Scientists from Osaka University in Japan have taken single-molecule conductors and straightened them in an effort to improve their performance. The team of scientists made single-molecule nanowires that measured up to 10 nanometers in length. Through their research, experts learned that taking the ribbon-like chains and forcing them to lay flat dramatically improved their conductivity, as opposed to their traditional twisted form. Scientists believe that this discovery could potentially help them to develop a new generation of high-tech devices, such as photovoltaics and smartphone screens, that are both powerful and inexpensive ..."

Axiom Test Equipment: Rent, Buy, Trade & Repair

Axiom Test Equipment - RF CafeAxiom Test Equipment allows you to rent or buy test equipment, repair test equipment, or sell or trade test equipment. They are committed to providing superior customer service and high quality electronic test equipment. Axiom offers customers several practical, efficient, and cost effective solutions for their projects' TE needs and is committed to providing superior customer service and high quality electronic test equipment. Please check out Axiom Test Equipment today!

Japanese Technology - Bidding for World Leadership in Solid State Microwave Gear

Japanese Technology - Bidding for World Leadership in Solid State Microwave Gear, December 13, 1965 Electronics Magazine - RF CafeThe December 13, 1965 issue of Electronics magazine was largely dedicated to assessing Japan's status in the electronics industry. Japan, with the help of the United States, made a remarkable recovery from defeat during World War II to have become an emerging power in electronics. "Made in Japan" labels on products had transformed from being the butt of jokes because of pre-war low quality products to representing assurance of low cost, high functionality and high value products. It still does to this day. The Japanese people have worked hard to acquire the world's respect as smart innovators and hard workers, and have been sure to maintain manufacturing bases within their borders. When you read this article, be prepared for a few dated terms like a "Kita" diode ...

3D Smith Chart v1.02 Release Now Available

3D Smith Chart v1.02 Release Now Available - RF CafeDr. Andrei Muller, progenitor of the world's first 3D Smith Chart™ software program, has teamed with a handful of able colleagues to release a commercial version of this paradigm-changing design and analysis tool. IMHO, it is only a matter of time before one of the major players in RF/microwave simulation (NI/AWR, Keysight, COMSOL, et al) integrates this incredible analysis tool into a software package. The following press release was issued on July 17, 2019. "3D Smith Chart™ announces a new version (1.02) of the 3D Smith Chart with new features. The original 3D Smith Chart tool (version 1.01) extended the Smith Chart capabilities for the first time since the 1939s to make it usable for circuits with negative resistance based on a unit sphere that plots circuits with reflection coefficient magnitudes larger than 1 by mapping them as arcs ..."

For the Record: FCC Bears Down on CB Radio

For the Record: FCC Bears Down on CB, May 1967 Electronics World - RF CafeCitizen Band (CB) radios were all the rage during my high school years (1973-76). Previously the domain of over-the-road haulers, by then everybody who was anybody had a 23-channel CB in his/her car or pickup truck. My 1969 Camaro SS, of course, sported one - probably the cheapest model available. Those were the days of C.W. McCall's "Convoy" and Cledus Maggard's "The White Knight" lyrics. Everybody knew the words to it. Smokey and the Bandit fed the craze. After all, there were no cellphones. Rather than learning text messaging shortcuts like OMG, *$ (the company didn't even exist then), B4N, and IMHO, we learned to use clever words and phrases like "10-4," "bear in the air," and "what's your 20?" It's been a long time ...

Notable Quote: "That's One Small Step for [a] Man..."

"That's One Small Step for [a] Man..." - RF Cafe"That's one small step for [a] man, one giant leap for mankind." - Neil Armstrong, from the moon on July 20, 1969. Armstrong says he did utter the word "a," and that the scratchy radio transmission masked it. Having been a huge fan (short for "fanatic") of the space program and builder / launcher of model rockets, I was sure to watch the momentous event on TV as it was broadcast live from the moon on a Sunday evening at 10:56 PM EDT, a month before turning 11 years old. The Estes model rocket company issued certificates to rocketeers who launched any model during the flight time of Apollo 11; of course I got mine with an Alpha rocket.

ConductRF Intros POWeRUN RF Cables

ConductRF Intros POWeRUN RF Cables - RF CafeConductRF, an industry leader in high quality RF cable assemblies, introduces their line of POWeRUN RF cables. POWeRUN RF cables are designed for superior performance in the DC to 18 GHz frequency range at powers up to 170 watts for the WSA74 series and 345 watts for the WSA84 series. High phase and amplitude stability is, and low loss is standard across the series. Flexible construction is designed for high power and long cable runs. Rugged outer covering over cable supports outdoor use. Ideal for commercial and military applications ...

How NASA Recruited Snoopy and Drafted Barbie

How NASA Recruited Snoopy and Drafted Barbie (and GI Joe) - RF CafeSnoopy Astronaut Comic Strip c1969 - RF CafeThe title of this IEEE article is misleading in that NASA did not "draft" Barbie - only Snoopy (and Charlie Brown, BTW). "Snoopy" was the official name of the Apollo 10 lunar module (LM) and "Charlie Brown" was the name of the moon-orbiting command module (CM). There was a Gemini astronaut GI Joe at the time, too. Actually, it was the Apollo 10 astronauts who chose the Peanuts characters as mascots because of the popularity of the comic strip and Charles Schulz's giving Snoopy the alter ego of an astronaut (and, of course, a WWI flying ace). Here is the Kennedy Space Center account of the history of NASA's adoption of Snoopy. This Saturday, July 20th, marks the 50th anniversary of the Apollo 11 moon landing.

Windfreak Technologies ConductRF Precision RF Test Cables - RF Cafe
Rohde & Schwarz USA (Signal Generator Pocket Guide 2) - RF Cafe Res-Net Microwave - RF Cafe
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 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