Today in Science History -
Anatech 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.
This 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
Copper 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 ...
We'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 ...
If 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 ...
"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 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.
Unlike 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 ...
Just 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...
Most 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 ..."
One 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.'
Did 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.
Today, 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, 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 ...
"Scientists from Osaka University in Japan
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
allows you to rent or
buy test equipment,
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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
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The 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 ...
Dr. Andrei Muller, progenitor of the
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 ..."
Citizen 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 ...
"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, 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 ...
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
Apollo 11 moon landing.