Today in Science History -
Gowanda Components Group is pleased to announce that its offerings
of RF and microwave passive magnetic components are expanding in connection with the
acquisition of HiSonic in Olathe, Kansas. "HiSonic's designs, technologies and customers
complement those within our Magnetics Division," said GCG CEO Don McElheny. "The synergy
in our capabilities and applications will enable us to offer a broader range of innovative
inductor and transformer solutions to design engineers in commercial, medical, microwave,
military, space and other markets around the world ..."
"Only a few decades ago, finding a particular
channel on the radio or television meant dialing a knob by hand, making small tweaks
and adjustments to hone in on the right signal. Of course, we now take such fine tuning
for granted, simply pressing a button to achieve the same effect. This convenience is
enabled by radio frequency synthesis, the generation of accurate signal frequencies from
a single reference oscillator. The need for better radar in World War II drove the
development of radio frequency control, and its miniaturization in subsequent decades ..."
With a fair helping of chagrin, I admit to being
a "10-4 Good Buddy" type of Ham radio operator. That moniker is applied liberally by
pre-1991 (February 14, to be exact) amateur radio licensees to post-1991 licensees because
that was the year in which the FCC no longer required aspiring Hams to pass a
code proficiency test for an entry level license. It was a sort of Valentine's Day
gift. In 2003, the ITU announced the rescinding of its code requirement and allowed countries
to set their own standards. By 2007, General and Amateur Extra exams no longer required
code tests. I earned my Technician license in 2010 ...
Written by Terry Edwards, "Technologies for RF Systems" is a comprehensive resource provides
an introduction to the main concepts, technologies, and components in microwave and RF
engineering. This book presents details about how to design various amplifiers, circuits,
and chips for communication systems. It offers insight into selecting appropriate ADC
and DAC technology. Several worked examples are found throughout the book. This book
provides a summary of 21st century RF systems and electronics and discusses the challenges
of frequency bands and wavelengths, software-defined radio (SDR) and cognitive radio.
RF semiconductors are covered ...
magnetic lattice material developed by researchers at the University
of Missouri could be used to increase the battery life of electronic devices by more
than a hundred times, it is claimed. Singh's team developed a two-dimensional, nanostructured
material created by depositing a magnetic alloy, or permalloy, on the honeycomb structured
template of a silicon surface. The new material conducts unidirectional current, or currents
that only flow one way. The material also has significantly less dissipative power compared
to a semiconducting diode, which ..."
A lot of nostalgia gets waxed here on RF Cafe,
to which frequent visitors can readily attest. Old timers (if you're not one now, you
some day will be) often like to see remembrances of days of yore, the halcyon days of
past hobbies, family, long naps, school (yuk), vacations, and other pleasurable times.
Hopefully, you already have or will soon have a few of your own. This 3-page
Lafayette Radio Electronics spread from a 1965 issue of Popular Electronics
magazine is typical of what what avid electronics hobbyists would have read and drooled
over with so many great items in the offering. If you were like me, the cost of most
of the things I wanted were well outside my budgetary reach. Prices for electronics gizmos
were quite high ...
everything RF has created the largest database
of searchable RFID products.
We have compiled complete catalogs from the leading RFID manufacturers across 6 categories
and make the products searchable by specification: RFID antennas, RFID reader ICs, RFID
reader modules, RFID readers, RFID tag ICs, and RFID tags. everythingRF has also created
parametric search tools in each category and are now adding more products and companies
to the system ...
"There are still some places the Internet of Things
fears to tread. Researchers at the University of Arkansas and the KTH Royal Institute
of Technology, in Sweden, are building a radio for those places. This month, in IEEE
Electron Device Letters, they describe a mixer, a key component of any wireless
system, that works just fine from room temperature all the way up to
500 ºC. It's the first mixer IC capable of handling such extremes.
Of several projects 'one of the more sexy is trying to put a rover or some sort of instrument
on Venus that will last for more than two hours ..."
A news story with a title about a boat and reverse
current is more likely to be referring to water flow in a river or stream than about
electrical current in a conductor. Having grown up in a neighborhood next to a tributary
of the Chesapeake Bay, I spent quite a bit of time around boats, both large and small.
Salt water is particularly destructive to metal hulls due to
cathodic corrosion, exacerbated by the salt water's conductivity. While working as
an electrician in the 1970s, I installed electrical supplies for a few dockside cathodic
protection systems that probably functioned like the one described in this 1965 issue
of Popular Electronics magazine. The principle is fairly simple whereby anodes
are placed in the water around the hull and a counter-current is induced ...
It'll come as no surprise to any savvy buyer,
and certainly not to any design engineer, that each new generation of electronic products
packs more performance into a smaller package than the product it replaced. No matter
whether it's a remote industrial sensor node or the next smart wearable device, space
is becoming an increasingly scarce resource. Aimed at IoT and personal electronics applications,
the TLV9061 consumes only 0.64 sq.mm and is the
world's smallest op amp. Something's gotta give. In this case, many
things. Fitting the increased capability into a smaller volume requires the designer
to make improvements in multiple ...
Cesium-137, iodine-131, carbon-14, plutonium-239,
strontium-90, uranium-235, and the list goes on. These and other
radioisotopes associated with nuclear material are the result of explosions, medical
treatments, laboratory experiments, or in some cases naturally occurring deposits. Regardless
of the source, most people, including me, cringe at the thought of being exposed to the
insidious effects of the cell-altering energy they possess. Ionizing radiation is the
dangerous type of radiation due to its ability to dislodge electrons from atoms, and
in the process forming cancerous cell mutations or killing the cells altogether. Researchers
in the early days of radiation discovery experienced sometimes gruesome maladies as a
result of the handling isotopes. Some knowingly subjected themselves to harmful doses ...
Saelig has introduced the
STD-302Z 434 MHz Narrow Band Multi-Channel Transceiver - a half-duplex
UHF radio module that is suitable for industrial remote control and telemetry applications
operating in the 434 MHz ISM band. The STD-302Z is designed with SAW filter and
narrow-band filtering techniques to provide reliable data communication in industrial
situations where interference rejection and practical distance range operation are required.
Offering 10 mW of RF power from its PLL-synthesized transmitter with programmable
RF channels, the STD-302Z's double superheterodyne receiver sensitivity is specified
down to -119 dBm ...
QuinStar Technology designs and manufactures
mm-wave products for communication, scientific, and test applications along with providing
microelectronic assembly, rapid prototyping, and mass customization. Amplifiers, Oscillators,
Switches, Attenuators, Circulators, Isolators, Filters, Waveguide, Antennas, Phase Shifters,
Transceivers, Mixers, Detectors. QuinStar specializes in cryogenic
amplifiers, circulators, and isolators. Please visit QuinStar today to see how they can
help your project ...
"The future of electronic devices lies partly within
the 'internet of things' - the network of devices, vehicles and appliances embedded within
electronics to enable connectivity and data exchange. University of Illinois engineers
are helping realize this future by minimizing the size of one notoriously large element
of integrated circuits used for wireless communication - the transformer. Three-dimensional
rolled-up radio frequency transformers take 10 to 100 times less space, perform
better when the power transfer ratio increases and have a simpler fabrication process
than their 2-D progenitors, according to a paper detailing their design ..."
Lou Frenzel has posted a good article titled, "Electronics Still Thrives as a Hobby" on the Electronic Design
website. While attending his local Maker Faire in Austin, Texas, he discovered some statistics
on the cross-section of electronic hobbyists as gathered by the Jameco Electronics supply
company, who sponsored the event. He expressed surprise at the average age of participants,
but it actually comports well with that of many - if not most - hands-on (not including
game controller and smartphone button pushing) types of hobbies these days ...
If you look just beneath the RF Cafe page title,
you will see the Morse code dits and
dahs that represent this website's name. Click on it and you will be taken to the Morse
Code information page, and therein is an audio player that will sound out the code for
you. The music file was originally created in MIDI format in order to keep it as small
as possible. At the time, all the web browsers supported MIDI files. Times have changed
and now most browsers will not support them. I finally got around to converting the file
to MP3 format, so now the embedded player will provide the intended code transmission ...
"It may be too early for the wireless industry
to make major investments in
spectrum above 95 GHz, but it is the right time for researchers to
take a closer look at the spectrum and see where it might lead. ComSenTer is a newly
formed hub for advanced wireless and sensing research founded by a consortium of industrial
partners and the U.S. Defense Advanced Research Projects Agency (DARPA). ComSenTer researchers
are developing technologies for the high gigahertz and terahertz spectrum that present
opportunities for imaging and sensing capabilities at transmission speeds that are largely
Do you own one of those RFID-blocking wallets
to keep your credit cards from being read unawares? If so, you are engaging in electronic
countermeasures. Anyone interested in the history of
electronic countermeasures (ECM) and electronic counter-countermeasures (ECCM) will
benefit from this 1959 Electronics World article. ECM has been practiced as
early as World War I when wireless communications was first used for military purposes.
ECCM, of course, followed immediately on its heels. Electronic countermeasures range
from simple jamming of receivers to emitting spoofing signals that fool receivers. In
extreme cases ECM can destroy receiver front-ends by overdriving and burning out circuitry.
ECM and ECCM ...
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education, embedded design, WiFi integration, EMC, and manufacturing. Backed with a 3
year warranty and a 30 day no questions asked return policy ...
"Researchers based in Germany claim the first
GaN nanowire MOSFETs with an inverted channel, allowing a positive
2.5 V threshold voltage and giving enhancement-mode normally-off behavior. The high
threshold was achieved by using p-GaN as the channel material. With 0 V on the gate,
the channel blocks current flow. Increasing the gate potential inverts the channel, increasing
the electron density and allowing transport. The team from Technische Universität Braunschweig,
Universität Kassel and Physikalisch-Technische Bundesanstalt sees advantages from GaN ..."
At least 10 clues with an asterisk (*)
in this technology-themed crossword puzzle are pulled from this past week's "Tech Industry
Headlines" column on the RF Cafe homepage. For the sake of all the avid cruciverbalists
amongst us, each week I create a new technology-themed crossword puzzle using only words
from my custom-created related to engineering, science, mathematics, chemistry, physics,
astronomy, etc. You will never find among the words names of politicians, mountain ranges,
exotic foods or plants, movie stars, or anything of the sort. You might, however, see
someone or something in the exclusion list who or that is directly related ...
Bandwidth Efficiency Techniques Learned
from Cave-Dwelling Fish
"A new light-based device, demonstrated recently
by researchers, could mimic a fish's incredible
Jamming Avoidance Response (JAR) ability. JAR is a behavior performed
by some species of fish when their discharge frequencies are very similar, each fish
will shift its discharge frequency to increase the difference between the two fish's
discharge frequencies. By doing this, both fish prevent jamming of their sense of electroreception.
Moving the frequency of an emitted signal away from other signals that could potentially
cause interference can eventually help overcome the spectral bandwidth ..."
Robert Balin created this
Electronic Factor Quiz for the November 1966 edition of Popular Electronics
magazine. Your challenge is to match the drawing of a particular electronics circuit
or implement with the corresponding "factor." Examples are "current amplification factor,"
"damping factor," "modulation factor," "duty factor," "form factor," "quality factor,"
etc. There are ten in all. Of course on a quiz like this you cannot get just one answer
wrong - or any odd number for that matter. I managed to reverse #5 and #10 (I and B,
respectively). For some reason I couldn't remember what "form factor" was, but was sure
that #10 was a scale factor of sorts... wrong - a clear case of cranial rectumitis ...
Nigel Chapman and Fiona Wilson, of the UK's
AceAxis, have authored a short paper
titled, "PIM in Mobile Broadband Networks - Measurement and Management." "Passive
Intermodulation (PIM) is an unpleasant side effect of the successful deployments of mobile
networks, and is a problem that is growing in impact as complexity increases with the
deployment of 4G and - in the very near future - 5G networks. PIM has the potential to
degrade the efficiency of a cell site, and this network degradation directly impacts
the edge of cell performance and/or the throughput of the cell site. What is PIM? PIM
is a form of intermodulation distortion that occurs in components that are normally thought
of as linear ..."
"Some useful frequencies are elusive or simply
unknown to many engineers, so it wouldn't hurt to take some time and dig through the
FCC 'bible' of federal regulations. If your application is relatively simple, you have
even more choices than you know. Studying the FCC rules and regulations 'bible,' the
Code of Federal Regulations (CFR) 47 Parts 15, 18, 95 and others you can discover some
interesting possibilities. Of late, I learned of one alternative that fits basic industrial
needs and eliminates the complexity of complying with some of the more well-known standards.
This may be of interest if you're designing wireless applications ..."
This handful of
Ham-related comics appeared in the November 1965 issue of Popular Electronics. One
of them has an operator using "oboe" as the phonetic alphabet version of the letter "O."
Having never seen that before, I did a search and learned that the British Forces in
World War II uniquely used "oboe" for the letter "O." Maybe the artist, Walt Miller,
was either a member of the British Forces or hung around (or served in the military)
with someone that was. For that matter, using "able" for the letter "A" is also a British
thing. The Silent English phonetic alphabet is interesting. I guarantee you'll appreciate
the others as well, or double your money back ...