Another era, sadly, has come to an end. H. Ward
Silver (aka Ward Silver, NØAX) has announced the end of his monthly column, "Hands-On Radio," in
QST magazine. The title of
each column was enumerated as "Experiment #nnn," followed by the subject. To wit,
"Experiment #179 Maxwell's Equations - The Wave Emerges" is Mr. Silver's final column,
appearing in the December 2017 QST. "Hands-On Radio" topics ranged in
intensity from relatively simple discussion on calculating power dissipation in
resistors, capacitors, and inductors to more heady treatises on subjects like
electromagnetic fields within coaxial cable and waveguide to Maxwell's equations.
Mathematics, too ...
Triad 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.
"We view Triad more as a technology partner than a vendor for our line-of-sight communications
product line." Please check to see how we can help your project
Prior to the advent of high frequency solid state
devices like Gunn diodes, working at or above a couple GHz - even at low power -required
the use of cavity oscillators such as klystrons and magnetrons. They were bulky, espensize
and electrically very inefficient. This article outlines the theory of bulk oscillators
as developed by Dr. John A. Copeland, of Bell Labs, and points out the peculiarities
of the LSA (limited
space-charge accumulation) mode that makes it possible to obtain 20 milliwatts of
power at 88 GHz. Use of gallium arsenide (GaAs) enabled designers to construct receiver
circuits into the mm-wave region without the need for klystrons, thereby reducing cost ...
ConductRF is offering standard
D38999 RF coaxial
cable assembly configurations with RF Contacts including; BMA to 20 GHz SMPM
to 60 GHz Size #8 to 18 GHz Size #12 Mil-Spec. Size #16 Mil-Spec. Cable choice
include Low Loss Flexible and standard RG styles. Custom marking and also ruggedization
coverings including Nomex weave available ...
"Scientists have taken an important step towards
'twisted' light as a form of wireless, high-capacity data transmission
which could make fiber optics obsolete. Scientists can 'twist' photons - individual particles
of light - by passing them through a special type of hologram, similar to that on a credit
card, giving the photons a twist known as optical angular momentum. While conventional
digital communications use photons as ones and zeroes to carry information, the number
of intertwined twists in the photons ..."
"Qualcomm, China Mobile and ZTE combined their
5G expertise and demonstrated what's being described as the world's first end-to-end
5G New Radio (NR) Interoperability Data Testing (IoD) system with
a data connection based on 3GPP Release 15. Conducted at China Mobile's 5G Joint Innovation
Center, the demo used ZTE's 5G NR) system with a data connection based on 3GPP Release
15. Conducted at China Mobile's 5G Joint Innovation Center, the demo used ZTE's 5G NR)
system with a data connection based on 3GPP Release 15. Conducted at China Mobile's 5G
Joint Innovation ..."
Whitepapers, pamphlets, books, magazines, and
chapter examples listed here are a small sample of a lot of new items that are offered
for FREE to qualified users through
TradePub. Whitepaper topics include careers, manufacturing, and engineering,
while magazine titles include
Microwave Engineering Europe,
Electronic Design, and
Microwave Product Digest. Note: I earn a few pennies
(literally) when you download one of these or the many
other pubs available, so please help yourself ...
Anatech Electronics offers the industry's largest portfolio of high-performance
standard and customized RF and microwave filters and filter-related products for military,
commercial, aerospace and defense, and industrial applications up to 40 GHz. Anatech
has introduced a two new filters and a gas tube surge arrestor for your convenience:
a surface mount 32.0 MHz SAW filter, a leaded 1.25 MHz crystal filter, and a cool-looking
tube surge arrester with SMA connectors ...
far, the FCC appears to have struck a balance between the goals of terrestrial wireless
and satellite interests, at least based on early reads of the millimeter wave spectrum
item it passed at its open meeting Thursday. The
Satellite Industry Association (SIA) announced that it is initially
encouraged by the FCC order regarding the future deployment of wireless services in spectrum
bands above 24 GHz. In a news release, the FCC stated it will adopt rules regarding the
use of spectrum ..."
"UK government launches
Year of Engineering campaign to inspire next generation of engineers.
The UK government has pledged to work with hundreds of industry partners throughout 2018
to encourage young people and their parents to take a closer look at engineering. Launched
in response to an estimated shortfall of 20,000 engineering graduates a year, and growing
reports from industry that the skills shortage is having a significant impact on productivity
and growth the so-called 'Year of Engineering' hopes to galvanis ..."
Electro-Photonics LLC is a global supplier of
RF & Microwave components.
Our products include SMT hybrid and directional couplers, wire bondable passive components,
filters, and very useful test boards for evaluating components (spiral
single-layer capacitors). The Electro-Photonics team can support your small R&D design
requirements with RF & Microwave test fixtures and save you valuable design and characterization
time. Please take a moment to visit their website and see how your project might benefit ...
Reading through the news items in the vintage
electronics magazines provides a mixture of important historical facts and figures along
with some predictions on the future of the industry. Some of the predictions turn out
to be amazingly accurate, even though in retrospect they might seem obvious. Take, for
example, Sylvania VP Dr. Robert Castor's foresight about how, "the future growth of the
semiconductor industry lies in a major switch from the production of individual components
to solid-state subsystems that can be used as building blocks in electronic designs."
"Well of course," you might be temped to say; however, at the time there were still significant
hurdles to overcome related to material purity, wafer size, photolithography ...
Pulse Shaping in High Power Solid State Jamming Amplifiers When: Thursday, November
30, 12 pm to 1:30 pm Location: Marriott Marquis Hotel Marquis Ballroom. Pulse shaping,
as it is done today, is an effort to fix fidelity issues caused by the transmitting amplifier
and is accomplished by a combination of imperfect methods, most external to the amplifier.
In this technical session, Paulo Correa will describe a new high power amplifier architecture
with built in real time feedback that is capable of matching the input signal shape,
minimizing droop, overshoot, ringing, rise ...
"IBM quantum computers with 20
superconducting qubits will soon be available for online use by the
firm’s clients – according to the US-based company. The quantum systems will be running
by the end of 2017 and IBM also says that it has built and tested a prototype quantum
computer with 50 qubits. Part of the IBM Q family of quantum computers, the new systems
are based on transmon qubits. These store quantum information in terms ..."
A Microwave Journal technical education webinar
will highlight the use of NI AWR software products specifically Microwave Office circuit
AntSyn™ antenna synthesis and optimization software, for designing
a compact internet of things (IoT) dual-band Wi-Fi multiple-in-multiple-out (MIMO) array
antenna. Presented by Dr. Derek S. Linden, director of technology for AntSyn at AWR Group,
NI, the webinar will describe how to determine the initial specifications, explore the
design space, and obtain optimized antennas from the ...
"Germanium, an elemental semiconductor, was the
material of choice in the early history of electronic devices, before it was largely
replaced by silicon. But due to its high charge carrier mobility - higher than silicon
by threefold - the semiconductor is making a comeback.
Germanium (Ge) is generally grown on expensive single-crystal substrates,
adding another challenge to making it sustainably viable for most applications. To address
this aspect, researchers at RPI demonstrate
"It's the time of year when kids are thinking
about their holiday wish lists. So what's a parent to do when a child, possibly a very
young child, asks for a
smartphone? We hear that smartphones can be addictive, that screen
time can hurt learning, but can't these minicomputers also teach kids about responsibility
and put educational apps at their tiny fingertips? To learn more, let's look at two families:
one where smartphones are allowed for elementary to middle school-aged ..."
"The FCC's plans regarding
net neutrality, set to be revealed in detail on Nov. 22, aren't going
to end net neutrality. What the FCC is planning to do is reverse the 2014 decision that
placed the internet under Title II of the Communications Act. Despite dire warnings from
some corners of the media, the FCC's planned action isn't the end of net neutrality,
and in fact it may foster growth on the internet. Before we get started, let's all take
a deep breath. That's it. Breathe all the way in then hold ..."
if you could share a
computer-aided design (CAD) model and even allow a colleague to manipulate
it from afar? 'Click on this link, check out my design, and feel free to add more holes
or fill some in,' you might say. You wouldn't have to instruct your distant coworker
to install special software or worry about whether her operating system could run it.
Imagine that all your programs and data were stored in the cloud and that even computationally
intensive applications like multimedia editing ran just as well in your ..."