Tech designs, manufactures, tests and sells high value radio frequency
products such as RF Signal Generators,
RF Power Detectors, RF Mixers, RF Upconverters and RF downconverters.
They develop high quality, reliable, low cost products to make your
life easier. Windfreak Tech is developing high quality, low cost
products to make life easier for RF Engineers and hobbyist. Future
products will be more synthesizers, transmitters, receivers and
test equipment. All at low cost. Please note that Windfreak Tech
has relocated to Florida.
to build momentum and recognition for their "Size Matters"
Empower RF Systems is hosting live demonstrations of their 1 kW,
20 to 1000 MHz, 5U chassis design (model 2162)
at IMS 2013, Booth 1827. Packaged in a 5U, air cooled chassis
and delivering over 1 kW of output power, three specific models
are released (in the frequency ranges of 20
to 500 MHz, 500 to 1000 MHz, and 20 to 1000 MHz), and more
on the way based on an amplifier architecture that offers unrivaled
size / power advantages. Specs are guaranteed across full bandwidth
and over temperature. Embedded controls and user access are
saw a headline on EDN about Heathkit being back - again. They reappeared
a couple years ago with a few small build-it-yourself electronics
kits, but that quickly died out. I immediately went to the Heathkit
website and saw its sole content, the U.S. postage stamp with
Mark Twain (Samuel
Clemens) speaking his famous quote, "Just say the report of
my death has been grossly exaggerated." Pretty clever. There are
no hyperlinks, just the stamp, copyright info, and the Heathkit
EDN article had a link to an
online survey asking people what they want to see in the way
of kits. In case you don't know the origin of the Twain quote, here
Bartleby's attribution: "In 1897, Twain was living in London
where a cousin, Dr. Jim Clemens, fell ill. The newspapers, believing
Twain was near death, sent reporters to investigate. Twain made
his remark when the correspondent for the Evening Sun told him his
death had been reported in New York, and asked what he should cable
in reply." (Bartleby, of "I would prefer not
to." fame, was the
in Melville's eponymous story)
Technologies Designs and develops
wireless products. They design and develop products that analyze,
measure, control, and communicate. In-house developed customizable,
modular wireless platform,
RFOS™ , allows them to do this better, faster and with less
NRE cost. Venture wraps their core embedded wireless capability
in full service "spec to production" product development.
from the Cube is an occasional feature published by EDN.
It is akin to Sherlock Ohms in that readers submit stories
of personal experiences. This is an interesting account of troubleshooting
a circuit under extremely pressing conditions - it might determine
whether the maiden flight of the F-117A Nighthawk would happen on
Edward Nauman worked at Lockheed Skunk Works.
(COTS) usage was an unknown entity in the day for such projects,
so when a specially selected and vetted part ended up having an
inherent design shortcoming, it could really spell disaster for
the end user design team. Interestingly, the ensuing discussion
by readers ends up debating the spelling of 'gauge' vs. 'gage.'
unijunction transistor (UJT) was originally known as a 'double-base
diode' and explains why to this day the terminals are labeled 'E,'
'B1,' and B2.' It is commonly modeled as a diode connected between
two resistors, with one resistor being variable. As the name implies,
unlike a bipolar junction transistor (BJT) that is more familiar
to most people and has two semiconductor junctions connected to
the base, a UJT has just one junction. As is explained in detail
in the article, the net effect of the UJT's arrangement is a region
of negative resistance which makes it good for use as an oscillator.
In fact, the relaxation oscillator was one of the most popular uses
of the UJT.
modulation (FM) was, is, and shall always be: x(t) = Xc·cos
[Ωct + β·sin (Ωmt)], where the carrier is
xc(t) = Xc·cos (Ωct), and the modulating
signal is xm(t) = β·sin (Ωmt). Yea verily,
thus sayeth Edwin H. Armstrong. Amen. The methods for generating
and degenerating[sic] FM might vary, but the fundamentals do not
vary. Mr. Armstrong developed and patented his system of frequency
modulation in the late 1920s and early 1930s, so when this article
appeared in QST in 1939, FM was still fairly new - or even
unknown - to most people. Household radio dials still had only markings
for the commercial AM band (520 - 1720 kHz) and, in a few cases,
a couple shortwave bands (also AM). The information presented here
is suitable for study by anyone at any time.
have probably seen the news about asteroid "QE2"
(1.5 miles wide, like the one which eradicated
the dinosaurs) that will pass within 3.6 million miles of
the Earth on May 31. That might seem like far, but it is only 15x
the distance between Earth and the moon. Anyway, this
Frank and Ernest comic strip appeared on May 13th and I
cut it out to remind me to post it today, on the eve of QE2. QE2,
BTW, is a nerd pun on the potential destruction to Earth that the
Quantitative Easing policy might cause.
Front-End in Wireless Communications and Broadcasting: Circuits
and Signal Processing, by Fa-Long Luo. Covering everything
signal processing algorithms to integrated circuit design, this
complete guide to digital front-end is invaluable for professional
engineers and researchers in the fields of signal processing, wireless
communication and circuit design. Showing how theory is translated
into practical technology, it covers all the relevant standards
and gives readers the ideal design methodology to manage a rapidly
increasing range of applications. Step-by-step information for designing
practical systems is provided, with a systematic presentation of
theory, principles, algorithms, standards and implementation.
announces a new RoHS compliant VCO model
CRO0419A-LF for P25 mobile radios and basestation equipment.
The CRO0419A-LF is designed to operate between at 390 and 440 MHz
within a tuning voltage range of 0.5 to 5 Vdc. This VCO features
phase noise of -117 dBc/Hz @ 10 kHz offset and a typical
tuning sensitivity of 17 MHz/V. The robust CRO0419A-LF provides
the end user typical output power of -4.0 dBm into a 50 Ω load
while operating off a 5 Vdc supply and drawing 40 mA.
comic strips (aka 'funnies') in the
1930s and 1940s featured numbskulls, ne'er-do-wells, and simpletons.
There was usually one character in the strip's cast that was smart
- at least in a relative way if not absolute. Being familiar
with some of the old comics like Blondie, Barney Google, Krazy Kat,
Beetle Bailey, Gasoline Alley, etc., I can see a definite relationship
between the story line of "Entertaining Uncle Oscar" and the comics
of the era in this short piece that appeared in a 1939 edition of
the ARRL's QST magazine. As you might guess, the feller
named 'Ham' is the smart one.
has published its MayNuWaves has published its May
2013 newsletter. They invite you to meet them at the MTT-S show
in Seattle, introduce a new bi-directional RF amplifier for the
L and S bands, and tell a little of what they've been up to.
Cafe depends on the generosity of advertisers to provide me with
enough income to subsist on.
Circuits has been doing so for many years. Please visit their
website to see whether they offer anything you can use. The ASC
staff is made up of world class, highly experienced Ph.D. materials
scientists, engineers, Six Sigma black belts, and several Six Sigma
green belt candidates undergoing training. ASC has state-of-the-art
process control systems.
Electronics, Inc. has free passes for the 2013 MTT-S IMS show in
Seattle Washington. These passes allow complimentary access to the
IMS exhibition floor. We are offering passes on a first come first
serve basis. If you are planning to attend and would like to obtain
these passes please contact us as soon as possible. It happens next
you think of printed circuits, probably what comes to mind is what
is really a photo-etched circuit board. In the early days of printed
circuits a lot of the circuits actually were 'printed' on a
substrate of some sort. A silkscreen process was often used for
low resistance interconnects and printed inductors, as well as for
printed resistors on materials like fiber, plastic, phenolic, and
even (yikes) asbestos board. There
is still what is called a thick film screen printing process used
today primarily in military systems, but overwhelmingly the photo
etching process is used to generate circuit boards. In the era of
vacuum tubes, it was not uncommon to have grid biasing circuits
printed directly on the glass enclosure using a resistive paint
and then trimming for the target resistance by removing excess material.
This article shows an example of a circuit printed on a
6J6 twin-triode tube.
December 1950 issue of Radio & Television News ran
a series of articles on Navy communications. This was a mere four
years after the end of World War II and right at the beginning
days of the Korean War. Communist and fascist regimes never give
the world a moment's rest (some - not me -
think just being nice to them will cause them to be nice in return).
Discussed here are issues still relevant to modern outfitting of
naval assets with new or updated
communications equipment. Unlike land-based systems, naval environments
impose increased requirements for ruggedness due to harsh vibration,
impact, and corrosion issues. Weight added above the waterline needs
to be offset with weight below the water line to preserve stability.
Reliability and personnel training also need to be increased because
being at sea means access to replacement parts, operators, and service
technicians are harder to accommodate. The military people
(officer and enlisted) who do the work
do so out of dedication and a sense...
take a moment to visit Vector Telecom to see whether they have products
useful to you. Vector Telecom has fully instrumented microwave,
millimeterwave, & antenna laboratories and production facilities.
Their professional engineers have backgrounds from telecommunications,
electronics, space and aviation industries, with frequencies up
to 50 GHz and at globally competitive prices.
the most interesting aspect of this chart is the animated way in
which it changes shape when you click the "Show Industries" button.
As technology and human capability increases over time, our expectations
increase for more sophisticated and entertaining presentations be
plots U.S. corporation
effective tax rates. Those to the left of the mean line paid
the least. Circle size indicates total earnings. So, a big circle
to the left indicates big revenue and low taxes paid. Apple is one
of the largest circles with $135B earnings and a 14% tax rate. Amazon,
at $5.5B, paid 6%. Google paid 17% on $56B. Warren Buffet's company
paid 23% on $96B. On the other side of the line lies Exxon Mobile
at 37% on $395B earnings. Pharma giant Pfizer paid 43% on $63B,
Chevron paid 39% on $220B. As a group, Utilities and IT companies
paid the least while energy and insurance paid the most. In the
light of the current IRS scandal, an interesting dimension to add
to the chart would be donations by corporate chieftains to political
parties. BTW, my effective
tax rate for 2012 was 37% (Fed alone was
this article is directed at amateur radio operators who want to
explore working in the microwave bands, it is good fodder for anyone
who wants a fundamental introduction to waveguides, resonant cavities,
distributed elements, and atmospheric propagation. If that describes
you, and particularly if you have formulaphobia, then start reading.
Even though the article appeared in a 1952 issue of Radio &
Television News, the list of frequency band allocations are
not much different than today so the information is useful.
television is a concept that has existed about since the time commercial
broadcast TV first came on the scene. Known as "Boxoffice
Television," it used a "Picture-caster" to scramble the picture
so that a subscriber needed a rented descrambler in order to view
the program. A rented key (physical, not digital) was used to turn
the box on and off. The signal went out over a standard local broadcast
tower or even over coaxial line. Channels 2 through 13 were it for
Latif, CEO of Linx Technologies, has received the
Service Member Patriot Award sponsored by the Employer Support
of the Guard and Reserve (ESGR). This award recognizes supervisors
and bosses nominated by an employee serving in the National Guard
or Reserve for support provided directly to the nominating Service
Member. The Patriot Award reflects the efforts made to support the
‘Citizen Warriors’ through a wide-range of measures including flexible
schedules, time off prior to and after deployment, caring for families
and granting leaves of absence if needed.
score and seven years ago our fathers brought forth on this continent,
a new nation, conceived in Liberty, and dedicated to the proposition
that all men are created equal. Now we are engaged in a great
civil war, testing whether that nation, or any nation so conceived
and so dedicated, can long endure. We are met on a great battle-field
of that war. We have come to dedicate a portion of that field, as
a final resting place for those who here gave their lives that that
nation might live. It is altogether fitting and proper that we should
do this. But, in a larger sense, we can not dedicate - we can not
consecrate - we can not hallow - this ground. The brave men, living
and dead, who struggled here, have consecrated it, far above our
poor power to add or detract. The world will little note, nor long
remember what we say here, but it can never forget what they did
here. It is for us the living, rather, to be dedicated here to the
unfinished work which they who fought here have thus far so nobly
advanced. It is rather for us to be here dedicated to the great
task remaining before us -- that from these honored dead we take
increased devotion to that cause for which they gave the last full
measure of devotion - that we here highly resolve that these
dead shall not have died in vain - that this nation, under
God, shall have a new birth of freedom -- and that government of
the people, by the people, for the people, shall not perish from
the earth." -
President Abraham Lincoln
is what happens when preparation meets opportunity." - Lucius Annaeus
Seneca, 4 BC - A.D. 65 (thanks to Ted
Sunday I create a
crossword puzzle using a word list that I personally created
and added to during over a decade of making puzzles. All of the
words are related to engineering, science, mathematics, chemistry,
astronomy, etc. There are no numbnut clues about movie stars or
clothing designers. This is a special puzzle in honor of Memorial
Day (originally Decoration Day) in
a subsidiary of Skyworks Solutions, is pleased to offer a new dual
channel, radiation-tolerant, hermetic surface mounted
phototransistor optocoupler that is designed for high-reliability
military and medical applications requiring optical isolation in
gamma, neutron and proton radiation environments with high current
transfer ratio and low saturation Vce. Each optocoupler channel
consists of a light emitting diode and NPN silicon phototransistor
that is electrically isolated but optically coupled inside a hermetic
8-pin leadless chip carrier package.
people today under 30 years old have probably never seen the mechanics
or electronics inside their many personal devices. Everything is
so miniaturized and optimized that if something does go wrong, there
is little chance of the owner repairing it. Instead, the phone,
television, stereo, microwave oven, whatever, gets thrown away and
a relatively cheap (compared to paying for
a repair) replacement is purchased
(or stolen). Besides, if the item was more than two years
old, it was on the verge of obsolescence anyway. Up until around
the early to mid 1980s you had a fair chance of being able to repair
an electronic circuit if trouble arose because at least with commercial
printed circuit boards were usually 1- or 2-sided and the components
still had leads protruding from the sides of the packages. A $10
Radio Shack soldering iron and some solder wick was sufficient...
Microwave, a division of Smiths Interconnect, has an opening for
Sales Engineer. The Sales Engineer provides sales management
and technical support in pursuit and capture of new product development
and recurring business opportunities. For over 50 years, Trak Microwave
has delivered reliability and performance to every mission. Trak
Microwave designs and manufactures a diverse range of RF and microwave
integrated assemblies, subsystems, components and time and frequency
systems for defense, space and commercial applications worldwide.
announces a new RoHS compliant VCO model
USSP1325-LF in the L-band. The USSP1325-LF operates at 1250
to 1400 MHz with a tuning voltage range of 0.5 to 4.5 Vdc.
This miniaturized VCO features phase noise of -100 dBc/Hz @
10 kHz offset while operating off a 5 Vdc supply and typically
drawing only 25 mA of current. The USSP1325-LF provides the
end user an output power of 3±3 dBm into a 50 Ω load while
operating over the industrial temperature range of -40 to 85 º
C. This robust VCO suppresses the second harmonic to better than
-15 dBc and covers the frequency range with a tuning linearity
of better than 1.1:1.
Schwarz has increased the frequency range of its high-end R&S
FSW signal and spectrum analyzer to 50 GHz. In conjunction
with analysis bandwidths of up to 320 MHz, the new microwave
model is perfect for sophisticated R&D measurements and for
radar and satellite applications. The new high-end R&S
FSW50 signal and spectrum analyzer is ideal in the development,
testing, verification and production of transmitters and components
such as those used in radar applications and satellite and military
communications systems. The analyzer covers the frequency range
from 2 Hz through 50 GHz.
new product announcement month highlights a 913 MHz outdoor cavity
BPF, a 2440 MHz cavity BPF, a water-resistant 5350 MHz cavity BPF,
a 380 to 2500 MHz 2-way power divider, a 800 to 2500 MHz 8-dB directional
coupler, and a 800 MHz LPF.
Electronics' Sam Benzacar invites you to visit them in booth
#2710 at the IMS 2013 trade show in Seattle, Washington.
is a world leader in precise time solutions. The company generates,
distributes and applies precise time for the communications, aerospace/defense,
IT infrastructure and metrology industries. As an
R&D Hardware Engineer, you will be designing and developing
leading edge timing solutions, and supporting production for a variety
of precision frequency source applications in the space, defense,
and avionics industries. In particular, you will be the responsible
Project Engineer for various precision Rubidium and crystal oscillator
projects at the component and sub-system level involving synthesized
reference sources. The detailed responsibilities include...
quiz is based on the information presented in
High-Frequency Integrated Circuits, by Rosin Voinigescu
University Press). The book is an incredible repository
of information that would be an immensely valuable resource for
any circuit designer whether dealing with discrete components or
laying out an integrated circuit substrate.
I read about Du Mont's
Iconumerator, the first thing that came to mind was the video
of the Rockwell Retro Encabulator and General Electric's Turboencabulator.
As it turns out, the Du Mont device is real. This article from
a 1955 issue of Radio Electronics discusses a new type
of oscillator-amplifier that works on the principle of
microwave amplification by stimulated emission of radiation
(maser). It used ammonia as a masing medium. Masers were quickly
applied to commercial broadcast systems, to military communications
systems, and in laboratories. The state of the art has of course
advanced far beyond the relatively crude apparatus shown here, but
it is always good to have a working knowledge of the technology's
take a moment and vote in this poll. No sign-in-required. Results
are displayed automatically. Thanks!
this is another Top 10 list for you. I am surprised to see that
a 1-page resume still tops these
resume writing tip lists, but evidently it is what busy
(or not so busy)
want to see. Most of the bullet points are things like... using
bullet points to organize and focus related topics, not mixing font
types, etc. One interesting piece of advice is if you are a new
grad and do not have intern experience to list DIY projects
(related to your field of study, of course).
Job Hunting After 50
Top Talent Leaving China
for Clearer Skies
Attracting Recruiters to
Your LinkedIn Profile
of RF and Microwave Power Amplifiers, by John L. B. Walker.
Whether you are an RF
transistor designer, an amplifier designer or a system designer,
this is your one-stop guide to RF and microwave transistor power
amplifiers. A team of expert authors brings you up to speed on every
topic, including: devices (Si LDMOS and VDMOS, GaAs FETs, GaN HEMTs),
circuit and amplifier design (discrete, hybrid and monolithic),
CAD, thermal design, reliability, and system applications / requirements
for RF and microwave transistor amplifiers. Covering state-of-the-art
developments and emphasizing practical communications applications,
this is the complete professional reference on the subject.
Corporation is a gold sponsor and will offer a full agenda of
activities at the International Microwave Symposium (IMS) 2013 that
inform and educate attendees about new ways to use RF/microwave
software for circuit and system design. IMS 2013 takes place from
June 4 to 7 in Seattle, Washington. In its Booth #330, AWR will
showcase software demonstrations of key features in its current
product release, v10, as well as a sneak-peek preview of features
within its pending v11 release.
acoustical tiles are not exactly the stuff of RF engineering,
their properties and their effects on sound waves are analogous
to RF absorbers and their effects on electromagnetic waves. Reflections
that cause multipath reception of signals that contain the same
information but are out of phase and unequal in amplitude to the
primary (direct) path seldom combine to enhance the overall signal-to-noise
ratio, so placing absorbent material in the surrounding environment
is necessary to improve signal quality. This article from Popular
Electronics goes through the process of outfitting an area with
acoustical tiles and give some empirical test data from before and
LM-26G40G-14-20W-292MM is a high power limiter capable of withstanding
an input power level of 20 Watts, 440 to 670 nsec Pulse Width,
PRF 600 to 900 kHz, 40% Duty Cycle. This model operates in
the 26.5 GHz to 40 GHz frequency range. The insertion
loss is 4.0 dB maximum, VSWR of 2.0:1 and 250 nsec response
time and a typical leakage of +14 dBm. This limiter is packaged
in a small 0.50 X 0.50 X 0.22 housing and is supplied with 2.92mm
article on the IEEE website pitches a career as a patent research
agent, which might be a particularly attractive notion in this lousy
engineering job environment we now experience. A law degree is not
required for many positions. The average salary range for a
patent agent is between $52k
and $143k, with a median of almost $90k. One of the first steps
in exploring the possibility is to download the United States Patent
and Trademark Office's (USPTO)
Manual of Patent Examining Procedure
(MPEP). Once you are prepared, you
pay the required fee and take the exam. I did not see anything that
addresses what your chances of being hired are if you pass, or whether
you would need to reside in Washington, D.C.
in the letters to the editor section of ARRL's QST magazine there
are lamentations about an overwhelming lack of technical knowledge
and/or proper etiquette and manners amongst fellow Hams. One contributor
commented, "Today, it's hard to distinguish a radio amateur from
a CB operator." DX operation (long distance)
seems to be the most affected aspect, although the problem is fairly
widespread. Most writers blame the problem on the ease with which
a license may be obtained these days. Ever since a requirement to
demonstrate proficiency in Morse code was removed, ostensibly, the
quality of operators has plummeted (my license
was earned in the sans code test era). That may be so, but
I propose the problem is much deeper - it is societal. Every generation
by Monkeys is a regular feature of Design News. Readers
submit stories of instances of what they consider to be
design. Some of the stories are good, but generally I like
Sherlock Ohms and Tales from the Cube articles
better because they concentrate on troubleshooting rather than complaining.
This particular episode belongs in the Sherlock or Tales category
rather than Monkeys. In fact, "The
Messed-Up RF Generator" experience is just the opposite in nature
of something made by monkeys. Read it and see what I mean.
SMW200A high-end vector signal generator from Rohde & Schwarz
combines maximum flexibility, outstanding performance and intuitive
operation to outperform all comparable solutions available on the
market. It is the perfect tool for generating complex, digitally
modulated signals of high quality. Thanks to versatile configuration
options, its range of applications extends from single-path vector
signal generator to multichannel MIMO receiver tester.
Schwarz is one of the world's leading manufacturers of
test & measurement, communications and broadcasting equipment.
They have just joined with my other highly appreciated advertisers
to help deliver RF Cafe content to you. Vector network analyzers
(VNA), communications and spectrum
analyzers, signal generators, and o-scopes
(DSO), power supplies are among their offerings. Please visit
rules were an enigma and a thing to be feared to most people even
in the days when handheld digital calculators had not entered the
scene. The rows of numbers generally look nothing like a simple,
familiar ruler, and the sliding window thingy with the thin line
sent kids and adults alike running for the tall grass for cover.
As with most things not too complicated, learning to use the
slide rule can be mastered with a little instruction. You don't
necessarily need to understand logarithms and trigonometry functions,
but it certainly helps if you also want to understand how the device
works. It is the same thing as not needing to know how your Casio
digital calculator works in order for it to be useful. If you do
an Internet search for instructions on slide rule usage, there is
no shortage of documents. This one from Lawrence I believe does
a particularly good job because it is filled with examples of the
most common types of mathematical operations, including powers and
world is run by 'C' students." - Anon. Bush and Clinton were both
'C' students. We have no idea what Obama's GPA was because his records
are sealed, but we're assured by the media he is an absolute genius.
you have been a bit fuzzy on how
spectrum auctions work (or don't work,
per author Mitchell Lazarus), then this article might be
worth perusing. A brief history on the pre-auction days and how
the system worked then, versus the government-manipulated environment
now in effect. In its ever-increasing mission to extract money from
productive enterprises, the
FCC has caused an
enormous waste of available spectrum. Rather than creating an electromagnetic
platonic utopia, it has largely mucked up the works. The same type
of bureaucrats will soon be running our health care.
Sunday I create a
crossword puzzle using a word list that I personally created
and added to during over a decade of making puzzles. All of the
words are related to engineering, science, mathematics, chemistry,
astronomy, etc. There are no numbnut clues about movie stars or
clothing designers. Enjoy.
Anatech Electronics has published its
May 2013 newsletter. As always, it includes both company news
and some tidbits about relevant industry events, regulations, and
standards. Anatech Electronics' Sam Benzacar invites you to visit
them in booth #2710 at the IMS 2013 trade show in Seattle, Washington.
are not many technical realms where Google engineers have not either
entered or created. Wireless connectivity is key to their continued
dominance in the information domain, so they understandably have
a vested interest in the "white
space" spectrum debate. White space comprises portions of the
electromagnetic spectrum where bands are either unlicensed or where
licensed bands are or will be up for grabs. An example of the former
is the 2.4 GHz Wi-Fi band, and an example of the latter is
some parts of the broadcast television band that is being vacated
in areas. Google is working with the FCC to build a real-time database
of what they term "dynamic spectrum" in order to provide useful
information to both users and providers. A separate database is
available for fixed and mobile spectrum. Enter your location of
interest and the map zooms into that region. For instance, in my
town of Erie, Pennsylvania, there are 21 channels available as of
Power Products has 25 years of experience designing & manufacturing
RF passive components.
Our couplers, combiners, resistors, and terminations incorporate
the latest technology in materials available, which equates to unrivaled
product performance. We're proud that our RF resistors, terminations
and 90 degree hybrid drop-in couplers are RoHS compliant
is a different kind of
venture capital story.
Tables are turned in this story where, rather than the company founders
desperately chasing after investors with deep pockets, the investors
pursue a highly successful startup.
Qualtrics is a data collection and analytics company that grew
from a father and son basement operation in 2002 to $48M in sales
in 2012. They boast such clients as Barnes & Noble and Zappos.
Ryan Smith, the son, decided in 2009 to chum the investment waters
and was overwhelmed with responses (I'm not
going to call the VCs sharks... not here, anyway). This short
article in Inc. magazine recounts his selection process. The old
adage about everyone loving a winner rings true here.
is a 1950s vintage
electronics crossword puzzle by Arthur L. Branch. Unlike the
weekly crosswords from RF Cafe that uses only relevant technical
words, this one fills in with common words when necessary. It's
still a good puzzle, though.
Here are a few white papers that might interest you if you are
a circuit or system designer. Some require you to fill in a form
Determination of Capacitor
Life as a Function of
Operating Voltage & Temp
Weight Reduction and Space
Savings in Wire and Cable
Design and Their
Contribution to Aerospace
Design and Efficiency
What They Didn't Teach You
in Engineering School About
Techniques for Precise
in the Field
Techniques for Precise Cable
and Antenna Measurements
in the Field
latest entry in the case journal of the renowned Sherlock Ohms is
the Time?" It is indicative of what happens when the
decides to try an experiment without letting the entities that rely
on them know what is going on.
national and international
usage has continued to undergo a constant cadence of change.
These changes necessitate the need to continue to evolve your awareness
of valuable spectrum allocation information. As evidenced recently
in the U.S.: Analog TV has mostly gone quiet and been replaced
with Digital TV; the LORAN-C navigation system has been shut down; new
GPS satellites and frequencies provide coverage to Smartphones;
and the National Wireless Initiative is looking to actively refarm
and commercialize over 500 MHz of spectrum for commercial high-speed
wireless services. Please click to get the latest
Spectrum Allocations Poster from Rohde & Schwarz.
my many years as an RF applications engineer with a well-known RFIC
manufacturer, I did a lot of competitive analysis work that involved
doing teardowns on products like cellphone PAs, Wi-Fi transceivers,
FEMs, SAW filters, and even entire commercial products like cellphones
and Bluetooth devices. During the process, I learned a lot about
how to identify components with no external markings and how to
check for copyright infringements. Most of the work I did myself,
but occasionally outside assistance was required to do x-rays, decapping
of ICs, etc. One company that we solicited to provide overall industry
state of the art info was
Prismark. Their reports were always excellent and full of data
that is nearly impossible to obtain otherwise. Their
reports are something you or your marketing and engineering
managers would be interested in seeing. The reports are not cheap,
but could pay for themselves many time over.
(No, I do not receive any compensation for
Solutions introduced groundbreaking
RF switching technology that is enabling early adopters to implement
carrier aggregation solutions. Carrier aggregation allows mobile
service providers to combine spectrum and increase data rate throughput
by utilizing two or more bands simultaneously instead of the single
band method used currently, thereby giving consumers an enriched
data experience regardless of location. Skyworks' devices support
standardized inputs to popular industry chipsets
(MIPI RFFE compatible) and address
both transmit and receive switching paths. "Skyworks' carrier aggregation
switching solutions, which are compliant to tier-one, carrier-driven
specifications, offer dedicated receive diversity functionality
to accompany the primary antenna-switch path."