Today in Science History
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 ...
"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 ..."
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 ...
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 ...
The vast majority of advice columns on job searches recommend
to job seekers while participating in an interview; however, "Choosing an Interview Style and Format,"
by Will Zimmerman of CareerCast, covers the other side of the interview. His article discusses ways
you as an interviewer might consider to most effective tactic ...
- How to
Negotiate Salary in
Key Phrases to Use When You
Talk to Your Boss
Choosing an Interview
Antenna Test Lab Co has evaluated countless antennas and RF transmitter products.
With a fully anechoic chamber, antennas can be quickly developed and RF products refined
and deployed. Mounting surfaces like drywall, glass, wood, and even curved metal
simulated automobile available. The price for a standard resolution
2D or 3D field pattern plot is only $450 - for a passive
or radiating antenna. That is an incredible deal!
our 40th anniversary! Taking place March 27-31, 2017 in Las Vegas,
is a venue where people can make the human connections they need to be successful, whether it is connecting
to a future client, boss, employee or business partner. It is also where people can connect to information
about a technology, product or policy that is crucial to success. See innovation at its best and join
us for the premier event for communications technology ..."
API Technologies has published a white paper titled
to Electromagnetic Compatibility. "By definition, Electromagnetic Compatibility (EMC) describes
the ability of a system, a piece of equipment, or some other electrical device that utilizes electromagnetic
energy, to operate in its intended environment without suffering an unacceptable degradation in its
performance, or negatively impacting the ability of another device to perform its intended function.
This paper is ..."
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.
"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 ..."
"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 ..."
"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 ..."
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 ...
Texas Symposium on Wireless and Microwave Circuits and Systems conference committee
invites paper submissions for the 2017 conference, to be held on the beautiful campus of Baylor University
in Waco, Texas, on March 30-31, 2017. Authors from the industry and academia worldwide are invited to
submit four-page papers of their original and previously unpublished work. Paper submissions in all
areas of wireless and microwave circuits and systems are welcome. Topics of interest include: • RF and
microwave circuits and systems ..."
"A tiny company based in Barcelona is promoting a new technology
that it hopes can revolutionize smartphone antennas - by removing them altogether. The job of any smartphone
antenna is to radiate a radiofrequency signal generated by the phone's transmitter out to the nearest
cellular base station or Wi-Fi router. Now,
Fractus Antennas wants to replace that antenna with a much smaller component called
an antenna booster—a tiny lightweight cube ..."
Harris Space & Intelligence Systems is looking for an
Specialist at its Palm Bay, Florida location to provide technical support to the RF & Microwave
Engineering Department and support department labs. Projects/tasks will vary depending on program requirements.
Job duties will require skilled workmanship, integration, testing, and ability to follow verbal and
written instructions. Complexity of tasks will increase with time in position ...
FAA Eases up on Electronic Devices on Flights
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
Motorola Solutions Sues Hytera Communications, Alleging Patent, Trade Secrets Theft
U.S. Companies Still Hold Largest Share of Fabless Company IC Sales
Everything You Need to Know About Quantum Computers
SEMI February Billings up 6% on January
"Two-way communication requires, of course, both send and receive
capabilities. But putting them in the same device requires a filter between the send and receive circuits
to provide signal isolation. Without a high performance filter, communication would be impossible. Researchers
in Cornell University's Molnar lab have devised a method for both transmitting and receiving a radio
signal using a single chip
without the use of a filter. This technology could potentially change the way wireless ..."
AM radio station WISE, in Asheville, North Carolina, today is
an ESPN sports broadcasting entity, but until 2004 it was a Top 40 type music format. It gained notoriety
in World War II for being the first commercial broadcast station whose
entire staff of radio
engineers was comprised of women. As reported in a 1945 issue of Radio Craft of chief engineer Madeline
Halleuth, "...she speaks the language of crystal-controlled frequencies, water-cooled transmitting tubes,
condensers, coils, and carries her position with the ease of a veteran radio technician." While America's ...
"Sweden's telecoms regulator PTS in February rejected the idea
of an entry-level Amateur Radio license. According to
Sweden's International Amateur Radio Union (IARU) member society SSA, the PTS 'categorically
rejected' the proposal, and that SSA must now find new ways to motivate prospective radio amateurs.
'Amateur Radio's future in Sweden is an urgent issue that will be discussed during the upcoming annual
meeting on Faro,' SSA said. The SSA estimates that fewer than 100 new licensees are joining the Amateur
Radio ranks in Sweden each year ..."
A new application example describes the steps used to design
Wilkinson power divider using ideal transmission lines, microstrip implementation, physical design,
and circuit compaction. The entire project is done in
NI AWR Design Environment, specifically
Microwave Office circuit design software, from schematic entry to physical printed circuit board (PCB)
implementation, ACE™ automatic circuit extraction ...
Pioneering microwave engineering company
Flann Microwave has celebrated 60 years of success by looking to the future with
an investment in a new coordinate measuring machine (CMM) to further enhance the precision manufacturing
and testing of its market leading waveguide and calibration technology. With a 60-strong team based
in Bodmin, Cornwall, UK, Flann has grown over six decades to secure a global reputation for innovation
and the production of precision microwave and millimeter ...
For the sake of avid cruciverbalists amongst us, each week I
create a new
puzzle that has a theme related to engineering, mathematics, chemistry, physics, and other technical
words. Clues in this puzzle with an asterisk (*) are pulled from this past week's (3/13
- 3/17) "High Tech News" column on the RF Cafe homepage (see the Headline Archives
page for help) ...
This is the third and final installment of Hy Levy's series on
attenuators, line filters, and matching transformers. Audio and low IF frequencies are used in the examples,
but the formulas and principles can be extended to higher frequencies.
Bifilar windings are covered as a method of minimizing self-inductance in wire-wound resistors.
Although inductance is not desired in resistors, bifilar windings can also be connected to have current
in both wires flowing in the same ...