Today in Science History
Another chapter in American tradition has come to an end. Sears
Roebuck is likely going into bankruptcy and then disappear - thanks to poor management. Fortunately, the
Craftsman tool line has been sold to Stanley Black & Decker, so at least part
of the legacy will live on. Most of
my tools are Craftsman - motivated mostly by tradition and a desire to support American
companies. Plans call for establishing new Craftsman manufacturing facilities stateside. BTW, the Sears
store here in Erie closed last November.
a Reading, PA-based department store chain ...
Electrocrystallization: Breakthrough in Gold Nanoparticle
"A research team as published a research study that demonstrates
how it is possible to obtain very high quality crystals formed of
The research on gold nanoparticles is a field of both fundamental and applied importance" explains Academy
Professor Kari Rissanen of the Department of Chemistry at the University of Jyväskylä. X-ray crystallography
is the most powerful method for molecular-structure determination of these nanosystems, but obtaining
good quality single crystals suitable for accurate X-ray ..."
In Millimeter Wave Wireless Communications, four of the field's pioneers, including
Theodore S. Rappaport, Robert W. Heath, Robert C. Daniels, and James N. Murdock, draw on their vast
experience to empower engineers at all levels to succeed with mmWave. They deliver fundamental, end-to-end
coverage of all aspects of future mmWave wireless communications systems. The authors explain new multi-Gigabit
per second products and applications, mmWave signal propagation, analog and digital circuit design,
mmWave antenna designs ...
Anokiwave is a fast growing fabless semiconductor company looking
for an ambitious, conscientious, and thorough
Senior Test Engineer to join the Anokiwave team in Billerica, MA. The ideal candidate
should possess a strong working knowledge of mmW measurements, calibration methodologies, semiconductor
probing, and python script language. You will play an instrumental role in the growth and excellence
of Anokiwave and our commitment to satisfying our customers. The successful candidate should demonstrate
"According to a recent report by Yole Group of Companies, the
RF front end modules and components market for cellphones is expected to grow from
$10.1B in 2016 to approximately US $ 22.7B by 2022. The investigative report based on the front-end
of the RF industry not only reports of a complex market that will more than double in six years but
also states the growth to be un-evenly distributed and with something or the other for every market
player. The group proposed two reports ..."
"This tiny US flag - just a few nanometers wide and invisible
to the naked eye - is arguably the world's smallest image of Old Glory, according to its creators at
the University of Texas at Dallas. In an experiment, the nanoflag pattern emerged unexpectedly as sheets
of the 'stripe' material -
molybdenum ditelluride - were heated to about 450 degrees Celsius, at which point
its atoms began to rearrange and form new structures - the 'stars' in this false-color image. Each star
consists of six central ..."
tech bubble peaked? Signs that the startup boom may be fizzling. Startups are beginning
to run out of money and investors are becoming more discerning. How does this compare to the time leading
up to the dotcom crash? If you were looking for an apartment in the Bay Area 18 months ago, realtors
recommended you took your checkbook to viewings and were prepared to fork out for the deposit and first
month's rent – that's $8,000 to $10,000 for a two-bedroom place in San Francisco – on the spot ..."
A story in an electronics magazine on the physics and biology
of the human ear is as relevant today as it was in 1936 when this appeared in Radio-Craft.
Back then, creating sound in an efficient and effective manner for consumer, commercial, and military
purposes was a relatively new science. Thomas Edison introduced his phonograph in 1877. While it did
not feature an electrically driven speaker, research determined the shape, size, and material composition
of the mechanism that converted minute vibrations ...
When I first as the title of this article, I thought it was going
to be a comical parody on how wives (YLs) of Ham radio operators (OMs) viewed their husbands' hobby.
It turned out to be a report on a nationwide survey. Many of wives of Hams were themselves licensed
operators which, at the time, required Morse code proficiency in addition to radio theory and regulations.
In 1966 the average cost of a Ham shack layout was about $1,000, which is equivalent to $7,518 in 2017.
As with most electronics ...
VidaRF offers a wide selection of 2-way through 64-way
designed to cover 100 MHz to 20 GHz with average power handling of 30 watts for narrow,
octave, dual and multi-octave band applications. Standard connector type: SMA female, other connectors
available upon request. VidaRF is a North Carolina based company that is focused on being a solutions
provider by building to customer specs and offering zero days lead time for custom parts through ...
NI (formerly AWR Corporation) continues
to proudly sponsor this year's 2017 IEEE International Microwave Symposium (IMS) thirteenth annual
Power Amplifier Student Design Competition (HEPA-SDC). The competition encourages student teams
from around the world to design and construct a power amplifier (PA) and bring it to IMS in Honolulu,
Hawaii, where industry experts will evaluate the performance of all entered PAs ...
military microelectronics experts are looking to GlobalFoundries U.S. 2 LLC in Hopewell
Junction, N.Y., to continue providing foundry and electronic chip fabrication services for crucial U.S.
military electronics systems. Officials of the Defense Microelectronics Activity (DMEA) in McClellan,
Calif., announced a $99.8 million contract modification to GlobalFoundries on Friday for option year
one for access to leading edge, current, and legacy microelectronics and trusted processes for the U.S.
Department of Defense (DOD) ..."
LDMOS amplifier operates at a frequency range of 2300 MHz to 2500 MHz and has a power
output of 25 watts, while still maintaining a compact form factor of 3.33 x 2.69 x 0.65 inches.
This unit also features internal protection against over/under voltage and excessive temperature conditions,
which coupled with its rugged construction, ensure fault-free operation in even the most extreme environments.
This class AB LDMOS module is designed for both military ...
Is this an über-cool homebuilt radio or what?
Proud Canadian and RF Cafe contributor
Dr. Marek Klemes
wrote to me a couple weeks ago regarding a quotation I had posted a while back. At the end of our communications,
he casually made a comment about needing to engage in an electronics project that would be free of the
rigors of his professional pursuits. Being a trained notable quote recognizer myself, I instantly realized
that his statement was itself worthy of being quoted widely. He granted permission to post it here (with adornment of ...
everything RF has created the
largest database of Bias Tees
on the internet. We have listed products from 28 of the leading manufacturers at the moment. We
are currently working on adding more manufacturers. Product data from each company has been standardized
and listed in a single database which can be searched by parameter. You can enter the frequency range
of the Bias Tee you need, the voltage it must withstand, the insertion loss, impedance and connector
type. Once you enter the required specification ...
3D Insider is all about giving you the tools and information
to create whatever your heart desires with a 3D printer.
If you are looking to make a full time career out of 3D printing or you are just looking for a
new hobby, 3D Insider has it all for you. 3D printing has been growing at a tremendous pace and we love
working in such a fast-paced industry. 3D Insider has been added to RF Cafe's
3D Printers and Fabrication resources page.
European Share of Fabless Chip Market Halves to 1%
Record Spending for Fab Equipment Expected in 2017 and 2018
Buys MIT Spinoff Arctic Sand
ARRL Reiterates Its Case for New Band at 5 MHz
Keurig to Pay $6M for Failing to Report Defective Coffee
Maritime Radio Day Event Set for April
Trump Bump Military Budget Ups Defense Spending
China Fab Boom
Fuels Equipment Spending Revival
FCC Issues Temporary Waiver Order Regarding Caller ID
"Who's the next Jon Rubinstein? For millennials that name might
not ring a bell. Rubinstein was the 'podfather': as head of hardware engineering at Apple he launched
and ran the project that became the iPod, the product credited from turning Apple from a computer company
into a consumer electronics company.
Facebook, it seems, would very much like to make a similar leap into consumer hardware.
So they need lots of good engineers - including an EE 'podfather.' Right ..."
"Researchers at the University of Bath have gained new insights
into the mechanisms of the
Northern Lights, providing an opportunity to develop better satellite technology
that can nullify outages caused by the natural phenomenon. The research team from the University of
Bath's Department of Electronic & Electrical Engineering in collaboration with the European Incoherent
Scatter Scientific Association (EISCAT) observed the Northern Lights in Tromsø ..."
"Noting that today's additive manufacturing and roll-to-roll
processes for flexible electronics still lack the adequate materials and level of precision to do without
surface mount devices (SMD), researchers from the University of Barcelona have investigated
the possibility to replace the screen-printing of reflow solder pastes, epoxies or other conductive
adhesives with direct inkjet printing of a silver-based ink. They describe their ..."
Planar Monolithic Industries (PMI) recently introduced two new
products in their extensive line of RF and microwave components. One is a
programmable, 30 dB PIN diode attenuator covering 26.5 to 40 GHz. The other is a suspended
substrate bandpass filter that offers a wide passband of 8 to 18 GHz. Contact PMI today for more information ...
"Common sense might dictate that for an object to move from one
point to another, it must go through all the points on the path. Not so for electrons in the
quantum world, which don't follow such common-sense rules for the most part. 'Electrons
can show up on the first floor, then the third floor, without ever having been on the second floor,'
Zhao said. 'In a sample made of three atomic layers, electrons in the top layer move ..."
Here for radio hobbyists are eleven handy-dandy 'kinks,' otherwise
known as tricks,
shortcuts, or clever ideas, that could prove useful while working in the lab at work or in your
shop at home. Admittedly, most of these ideas would not have much application with today's ready-made
radios, antennas, power supplies, etc., but there are still people who build custom equipment and/or
repair circuits. The most useful kink offered here that could come in handy for anybody is to clip off
part of ...
Pasternack has released the
PEM010, a complete millimeter wave transmitter module that is ideal for use in the
development of multi-gigabit, high-speed, point-to-point wireless communication links. These communication
links provide low-cost, gigabit wireless throughput for a variety of applications involving telecommunications
'last kilometer' distribution, telecommunications cellular backhaul, millimeter wave wireless gigabit
Ethernet data communications, building-to ...