Anatech August 2012
drive to create a nationwide
700 MHz public safety broadband network finally appears to have
some teeth thanks to its inclusion in the Middle Class Tax Relief
and Job Creation Act of 2012. The law reallocates 10 MHz of spectrum
in the infamous "D-block" to public safety, which along with an
existing 10 MHz of spectrum currently held by the Public Safety
Spectrum Trust (PSST) will create 20 MHz of spectrum dedicated exclusively
to public safety data communications.
Pasternack Introduces New
Line of Low PIM
Enterprises’ high performance
low PIM connectors are designed to fit on most commercially
available 1/2” corrugated copper and aluminum cables. Low PIM connectors
are available in 7/16 DIN and Type N series with both male and female
interfaces. Pasternack’s custom length assemblies using these new
low PIM connectors are made to order and ship the same day.
The KISS Principle at Work
story was sent to me via e-mail. I haven't checked the veracity
of it, but even if it's fictitious, it's still funny and makes a
good case for the KISS (Keep It Simple, Stupid) principle.
Thanks for the Support!
for the commercial & military markets from DC to 4 GHz. Hybrid
construction techniques, utilizing chip and packaged semiconductors,
on thick alumina substrates or PCB materials.
Patent Trolls on Trial?
lawyer Maggie Tamburro, of
IMS ExpertServices, weighs in on the infamous "patent troll,"
a genre of business practice that reportedly costs the U.S. economy
up to $29B per year. To address the problem, Congress recently introduced
a bill titled the "Saving High-Tech Innovators from Egregious Legal
Disputes." Ms. Tamburro argues that the practice is looked upon
favorably when it is a large tech company essentially acting in
a manner similar to companies whose raison d'être is solely the
exploit the protected work of others. What think ye?
Measurements for Insights
Measurements for Greater Insights by Agilent, Wednesday, August
22, 1:00 PM ET
Many Thanks for Support
by Fairview Microwave
added" distributor of RF, microwave, wireless & fiber optic
passive coaxial components - compliance screening available. RF
cables & connectors, crimp tools, calibration kits, torque wrenches.
act less precisely. The certainty of an absolutely correct outcome
can be lower than with computers. But because humans care about
the outcome, they tend to make decisions optimized for survival."
- Ken Bowersox, former Shuttle astronaut, commenting on whether
the U.S. space program should migrate to total robotics rather than
manned missions. September 2012
Air & Space
2016 Beloit College
August beginning in 1998, Beloit College has released the "Beloit
College Mindset List," which notes how changes in technology, cultural
standards, and world events has altered the attitudes and expectations
of the current crop of college freshmen. Just as the 1998 List addressed
the graduating class of 2002, this year's list focuses on the college
graduating class of 2016. What began as an admonition to the faculty
regarding how the world their students have lived in is radically
different from the one they experienced is now a much-anticipated
form of entertainment. Tenured professors might know the source
of common terms like...
RFMD® Commences LTE
Shipments to Samsung
expects to supply the majority of the 3G and 4G power amplifiers
in Samsung’s highest volume smartphones this calendar year.
RFMD already supports multiple feature phones, smartphones and
tablets for Samsung with a broad range of products, including PowerSmart®
power platforms, ultra-high efficiency power amplifiers, and other
critical high-performance components.
Thanks to Triad RF Systems
for Their Support!
amplifiers, Unmanned Aerial Vehicle (UAV, aka drone) systems, and
many standard (30 - 6,500 MHz, up to 200 W) and custom-designed
amplifier subsystems to your specifications. A small, private company
run by serial entrepreneurs.
Sherlock Ohms: Satellite
Ohms is a regular feature of Design News that features submissions
from readers about troubleshooting challenges and how they were
solved. This one is titled "The Satellite Station Motors Were Burning
Dust Particles Reflecting RF
in the Atmosphere
contributing editor Stan Horzepa (WA1LOU)
posted an interesting article on the radio propagation mode known
scatter." He conducted an experiment to determine whether he
could detect a “passive” meteor back-scatter from the recent
(August 12) Perseid meteor shower.
of professional technical magazines offer free subscriptions to
qualified peoples (often that just means
you still have a pulse). Advertisers pay according to circulation,
so higher subscription numbers mean higher sales prices for them.
A few of the most useful for us are
Electronic Products, and
Photonics Spectra. There are a couple hundred
and white papers to choose from.
Wireless Engineering Theme
the sake of avid cruciverbalists, each week I create a new crossword
puzzle that has a theme related to engineering, mathematics, chemistry,
physics, and other technical words. You will never be asked the
name of a movie star unless he/she was involved in a technical endeavor
Vacuum Tube Quiz
are still a lot of vacuum tube guys out there who might remember
enough about them to score well on this quiz that appeared in the
February 1961 edition of Popular Electronics. My own exposure was
mainly with airport surveillance and precision approach radars while
in the USAF. We didn't have a lot of the fancy special purpose tubes
shown here, but I was able to guess correctly on some of them based
on how the tube is constructed and the response curves. Still, I'm
embarrassed to tell you my overall score.
Please Thank KR Electronics
for commercial and military markets. Custom & standard filters
-bandpass, highpass, lowpass, notch, anti-aliasing, linear phase,
fast response, phase matched, absorptive, root & full cosine.
Microwave Journal Articles
Wireless Sensor Network Challenges and Solutions
by L. Doherty,
J. Simon and T. Watteyne
Antennas, the mmWave Advantage, by Christer Stoij
Tackling Satellite Interference
by Martin Coleman
Thanks to MECA Electronics
components including fixed attenuators, directional & hybrid
couplers, isolators/circulators, power divider/combiners, RF Loads,
DC blocks, bias Tees and adapters & cables. All RF realms served.
AWR Design Forum 2012
Off to a Successful
is an open event at which designers of microwave and RF circuits
and systems such as MMIC, RF PCB and LTE communication systems can
network and share useful information and resources pertinent to
high-frequency design, discuss AWR products and technologies, and
collaborate on industry issues and trends.
Impressed on Mars
portion of the tread pattern on the wheels of NASA/JPL's Curiosity
Mars rover consists of a series square and rectangular holes that
according to the Chuck Norris-looking guy on the embedded video
(below) serve as "visual odometry marks." They are arranged in an
asymmetric pattern on the rover that will leave an imprint on the
surface of Mars so the onboard cameras can look at them to determine
whether the craft is actually traversing the distance it is being
commanded to move. Less distance between sets of marks are an indication
that slippage is occurring. If that happens and Curiosity cannot
correct itself, it will stop and make a call back home to JPL and
await further instructions. The round-trip call can take anywhere
from about 6 minutes to more than 44 minutes, not including the
time needed to formulate a reply. Look more closely at the "visual
odometry marks", however, and you will notice those holes are squares
and rectangles that make up dots and dashes, respectively...
Please Visit Fotofab in
of custom-made thin metal parts. Chemical etching, metal stamping,
RF shielding, or any custom part made out of metal. RF/EMI shielding,
metal stamping, lead frames, filter screens. Samples available.
Khan Academy: "Learn
Almost Anything for
almost anything for free." That is the tag line of the Khan Academy.
While the claim is a bit of a stretch, especially when you need
to delve below surface level, they do have over 3,300 videos on
everything from math to physics, finance, and history. According
to their website, in August 2004, Sal Khan began remotely tutoring
his cousin, Nadia, who was struggling with unit conversion. Soon,
Sal also began tutoring her brothers as well. He became so popular
that he started recording videos and posting them on YouTube. More
and more people kept watching, and Sal has continued to make videos
ever since. Khan eventually drew the attention of Google ($2 million
grant) and Bill Gates ($1.5 million grant). The rest, as the saying
goes, is history. RF Cafe visitors might be particularly interested
in subjects like circuit analysis (4 lessons), capacitance, magnetism
(12 lessons), electric motors, electrostatics, Doppler, optics,
and fields. You might also like watching the video lessons on momentum
Intros 3 New Cavity
AB743B951 has a center frequency of 743 MHz and a bandwidth
of 6 MHz. The
AB2370B867 has a center frequency of 2370 MHz and 1-dB
bandwidth of 40 MHz. The
AB913B488 water-resistant cavity bandpass filter has a center
frequency of 913 MHz, bandwidth of 20 MHz.
are not managing their tools; their tools are managing them. Tools
now make the rules, and we struggle to keep up." - William H. Davidow
in the August 2012
Spectrum (IEEE), re accelerated pace at which sophisticated
technology is being introduced into society.
Bench Technician Job
Communications Company is seeking a mature, experienced person with
a dynamic personality and a strong electronics background as a Bench
Technician. The ideal candidate will be FCC licensed, ETA certified,
have experience with Motorola XTS, MotoTrbo professional and commercial
Challenges for SATCOM
Challenges and Techniques for SATCOM by Agilent, Thursday, August
16, 2:00 pm EDT
RFMD Intros 2.7V to 4.4V, 915 MHz Tx/Rx
for 868 MHz and 902 to 928 MHz AMR solutions, RFMD’s new
RF6549 features separate ports for Rx and Tx paths, and two
ports on the output for connecting a diversity solution or a test
port. PA section includes nominal Pout of 28 dBm.
Thanks to Oscilent for Support
Corporation is a manufacturer of frequency control products offering
design and production expertise in SAW Filters, quartz crystals,
crystal oscillators, crystal filters, and ceramic resonators.
The Foundations of Mobile
and Cellular Telephony
17 June 1946, a driver in St. Louis pulled out a handset from under
his car’s dashboard, placed a phone call and made history. It was
telephone call, placed on a system inaugurated by Southwestern
Bell, one of AT&T’s local operating companies... (IEEE)
IEEE Job Resources
How to Write Efficient Executive Summaries
Hidden Job Market Secrets: What You Need to Know to Find a New Position
in Today’s Job Market
"The Art of Failure Analysis"
the last few years, IEEE's International Symposium on the Physical and
Failure Analysis of Integrated Circuits has held an "Art of Failure
Analysis" photo contest. Familiar shapes and patterns occur regularly
in nature at the macro level that can be seen and recognized by
almost anyone; e.g., the Nautilus spiral, the Fibonacci series in
plant life, and fractal structures. It takes a high power optical
microscope or even a scanning electron microscope (SEM) to see those
familiar sights in the realm of the very small. Sometimes, though,
the images are downright bazaar and look eerily familiar. This first-place
winner from the 2012 "Art of Failure Analysis" is a good example.
Titled, "People on the Beach," this first-prize-winning SEM image
by Infineon's Lim Saw Sing...
High Voltage CMOS Driver
for PIN Diodes
Technology Solutions has introduced a new High Voltage CMOS Driver
for PIN diodes for use in military and commercial radio applications.
MADR-010574 is designed to work with M/A-COM Tech’s high power
and high voltage PIN diodes. This driver supports series-shunt and
all-series diode designs by biasing four diodes simultaneously.
Semis Other Than Transistors
March of 1958 when this article appeared in Popular Electronics,
learning of semiconductor devices other than transistors was usually
new to experienced professionals as well as to hobbyists. Vacuum
tubes still dominated electronic products in the day. Companies
like General Electric, Sylvania, and RCA were the pioneers for development
of Zener diodes, photodiodes, SCRs, thyristors, etc. Exotic compounds
like selenium, germanium, silicon, and lead and cadmium sulphides...
Among the Novice Hams:
of the amateur radio hobby have since the beginning put forth a
lot of effort training fledgling entrants in the realm of electronics
and communications. Up until the latter part of the last century,
there were a number of magazines - Popular Electronics among them
- that would regularly print articles covering the basics of electronics.
Other than the ARRL's QST magazine, it seems maybe Nuts and Volts
is the only monthly still in print that you can go to for such information.
I suppose it was inevitable with the emergence and now domination
of the Internet as a source for most knowledge. The Among the
Novice Hams column in Popular Electronics often included short
primers on subjects like the basics of capacitors and inductors...
Positions Now Open
RF Systems has announced positions available for the following areas:
Senior CAD Designer
Associate RF Engineer
L- and S-Band Pulse/Radar RF Engineer
75 Ω BNC HD Connectors
announces design and sales support for Radiall’s new
BNC HD Connector. The advanced design is available in a wide
variety of colors, and its unique easy grip boot allows for high
density integration without the use of a tool, making this high-definition
BNC the best choice for all broadcast applications.
Many Thanks to Anatech!
Electronics has been a long-time supporter of RF Cafe. They specialize
in RF & Microwave products specifically built for military,
commercial and wireless communications.
RFMD Intros 6-Bit Serial
Digital Step Attenuators
RFSA2654 6-bit digital step attenuators (DSAs) feature high
linearity over their entire 31.5 dB gain control range with
excellent step accuracy in 0.5dB steps. They are programmed via
a serial mode control interface.
Parting is Such Sweet Revenge
21st century has brought with it new ways to leave your job. The
exit strategies of the recently unemployed have taken a new tack:
social media is proving
to be an outlet for those who decide that they don’t want to go
Ohms is a regular feature of Design News that features submissions
from readers about
troubleshooting challenges and how they were solved. This one
is titled "Blowing Fuses & Exploding Circuit Panels."
Analog Devices’ 8- and 16-
Devices introduced two multiplexers,
that are able to guarantee latch-up prevention in high-voltage industrial
applications operating up to ±22 V.
Thanks to ACS for
designs, develops and sells Electronic Design Automation (EDA) software
tools for RF and microwave engineering applications. ACS's main
product is the
LINC2 linear circuit simulator.
µP-Controlled Router Base
students at MIT have developed a hand-held computerized router that
can precisely cut out or rout practically any shape on any size
wood (or plastic, foam, whatever) based on a digital map of the
pattern and the work surface. Strips of encoded tape are positioned
on the material and then the router follows the tape. Notice while
watching the video that the router moves around on the base unit.
The operator's job is to keep the router near the center of the
base so it doesn't move against a hard stop at the edge of the base.
This type of function is traditionally performed with an
type system that automatically moves the bit across the work
piece; they can cost tens or hundreds of thousands of dollars, depending
on the size. Depending on your patience and skill, an entire 4x8-foot
sheet of plywood could be handled if desired. I'm guessing this
device, once productized and made in China, will sell low end in
Sears for about $150.
PMI Intros Analog Phase
Shifter for 9 to
PS-9G11G-3609-A-SFF is an analog controlled phase shifter that
operates over the 9.0 to 11.0 GHz frequency range. This model
utilizes a phase shift control voltage ranging from ±7.5 V
for phase shift of 0-360°
AWR IMS2012 MicroApps
Videos Now on AWR.TV
Corporation has added nine videos of its MicroApps presentations
from the International Microwave Symposium (IMS) 2012 to its
Tune into the IMS channel to view the following AWR MicroApps presentations
August T&M World Articles
Test Method Improves PWB Reliability, by Paul Reid
A T&M View of the Higgs Boson Discovery: Pt 3, What They Actually
Measure, by Ransom Stephens
August RFTI Articles
Low-EMI Printed Circuit Board Design for High Frequency Waveforms
(p.10), by Earl McCune and David Wyskiel
Antenna Current Distribution: the Basis for Modeling and Simulation
(p.22), Gary Breed
The Mirror Technique for Reducing Radiated EMI (p.24), by Arturo
*---- Notice ----*
I will be away from my computer until Friday afternoon (August
10). I apologize in advance for any delays in responding.
RF Cafe Quiz #45
quiz is based on the information presented in
Handbook of Dielectric and Thermal Properties of Materials at Microwave
Frequencies, by Theodore Anderson. This book is a wealth
of information of dielectric characteristics of biological tissues
in plants, animals, as well as for ceramics, soils and minerals.
Particular attention is paid to properties in the ISM frequency
bands. Extensive sources for similar studies are provided.
Engineering & Science News
FCC Asked to Raise Limit on Cell Phone Radiation
Samsung Probes Allegation of Supplier's Underage Workers
Deutsche Telekom Profits Jump 74% as Costs Fall
16-Year-Old New York Boy is the Fastest Texter in America
Semico Cuts 2012 Chip Market Growth Forecast
First Logic Gate Made from Undoped Silicon Nanowires
Seeing the Light with NIST's New Noiseless Optical Amplifier
Prepay Now Main Driver of U.S. Smartphone Sales
U.S. Wholesale Stockpiles Fell as Sales Plummeted
GreenPeak to Lead the
Smart Home Evolution
Technologies, a leading Smart Home RF communications semiconductor
company, has announced it is expanding its product portfolio and
customer target base. GreenPeak ZigBee chips are already integrated
into leading cable industry set-top boxes to enable power saving
and long range RF based connections for remote controls. Rolling
out new radio chips that support the full range of ZigBee networking
technologies including ZigBee Pro, ZigBee IP, RF4CE and ZigBee Green
RF Cafe July Book
G., of Stafford, VA, is the July 2012 winner of RF Cafe's
monthly book drawing.
Warren selected The Parameter Space Investigation Method Toolkit,
Graciously provided by
Forum Request: Guidance Needed for My Future
recent visitor to the RF Cafe Employment Forum posted a request
for assistance: "I'm currently doing my Master's in Wireless Communications
at the University of Southampton. I will be graduating by the end
of September 2012.I was sure of getting a job in the UK after my
course gets over. But due to the VISA regulations in the UK, am
afraid that I wont be able to get a job. So, kindly help me out
by giving your suggestions for the following..."
Richardson RFPD Intros Two
AD5686RBCPZ-RL7, a member of ADI's nanoDAC+® family, is a low
power, quad, 16-bit buffered voltage output DAC. It includes a 2.5
V, 2 ppm/°C internal reference (enabled by default) and a gain select
pin giving a full-scale output of 2.5 V (gain = 1) or 5 V (gain
= 2). The
AD7988-5BRMZRL7 is a 16-bit, successive approximation, analog-to-digital
converters (ADC) that operates from a single power supply, VDD.
The device offers 500kSPS throughput and is a low power, 16-bit
sampling ADC with a versatile serial interface port.
witnesses play a big role in most - if not all - of the court cases
that get reported here. IMS ExpertServices is a law firm specializing
in expert witnesses. Every month or so they send me an article about
specific court cases that could be of interest to RF Cafe visitors.
This particular installment is titled, "To
Testify or Not to Testify: Re-Designating An Expert Witness?,"
and deals with a rather ironic turn of events in a medical case,
but the outcome could affect even patent and copyright infringement
cases, particularly given the reported low incidence of precedence
in these matters.
Job Hunting Tips from the IEEE
The Secret to Articulating Your Value
Why You Didn’t Get the Interview
Economic Strains Are Having Little Impact On Tech Job Opportunities
In The Asia-Pacific
M/A-COM GaN HEMT Pulsed Power Transistor
Technology Solutions Announces New GaN HEMT Pulsed Power Transistor.
MAGX-002735-040L00 is a gold metalized, internally matched,
GaN on SiC, RF power transistor that exhibits excellent performance
when operated at +50 V, class AB operation, 40 W peak output, using
a 300 µs pulse and 10% duty cycle pulsed signal. Leveraging state
of the art wafer fabrication processes, the transistor provides
high gain, efficiency, bandwidth, and ruggedness over a wide bandwidth
for today’s demanding needs.
Measurement Challenges of 160 MHz 802.11ac
Addressing Measurement Challenges of 160 MHz 802.11ac MIMO,
by Agilent, Thursday, August 9, 1:00 PM EDT. With the latest incarnation
of Wi-Fi, or 802.11ac, designers are leveraging signal frequencies,
modulation bandwidths, spatial demultiplexing and modulation schemes
to meet the throughput needs of 802.11ac. This has posed several
challenges for test equipment vendors as they try to meet the stringent
demands of 160 MHz bandwidths, MIMO streams, 256 QAM all at frequencies
of 5.8 GHz.
Hittite's MMIC LNA Covers
0.3-3 GHz, Only
HMC374SC70E is a high dynamic range pHEMT MMIC LNA which delivers
1.6 dB noise figure, +34 dBm output IP3 and 14 dB small signal gain
at 900 MHz. With saturated output power up to +19 dBm and output
IP3 to +36 dBm, the HMC374SC70E is also ideal for driving the LO
port of high linearity mixers and for transmitter pre-driver applications.
Engineering & Science News
LTE Revenues Expected to Grow 8x by 2016
National NFC Service to Go Live in Singapore This Month
Explore the Upper Reaches of the Amateur Radio Spectrum
in the ARRL 10 GHz and Up Contest
Apple Patent Trial: Samsung Scrutinized iPhone to Improve
Galaxy UI (will this set precedent
for teardowns & reverse engineering efforts?)
India Can Monitor BlackBerry Without Codes
Our Edisons are Alive and Well at NIWeek 2012
Nuclear Generator Powers Curiosity Mars Mission
Discordant Bits and Single Photons Boost Quantum Power
Gov't Motors (GM) Outsources $559M Advertising Deal
(imagine Dinah Shore singing
the UK in your Chevrolet")