women's roles and interest in STEM (science, technology, engineering, mathematics)
careers has been a major effort by schools in the last couple decades in an attempt to 'remove barriers,' both
real and perceived, inhibiting entrance into the fields. There are still many realms of STEM that women have avoided,
but computer programming and mathematics are examples their representation having seen steady increases.
Bauer can be seen in this 1955 Popular Science story on Project Cyclone, which reports on her role programming
what was at the time one of the largest computers in the world. Her work ran the gamut between civil engineering
on bridge projects to predicting missile flight paths for the military. You might recall the U.S. Navy's
Grace Hopper, who is credited with coining
the term "bug" for computers.
Corporation, the innovation leader in high-frequency EDA software, exhibits at
COMCAS 2013 and
IME 2013 in Israel and China the week of October 21, 2013. At each show, the latest release of Microwave
Office, Visual System Simulator, Analyst, AXIEM, and Analog Office for the design of MMICs, RF PCBs, RFICs, microwave
modules, communication systems, radar systems, antennas and more will be showcased. Specific software demonstrations
and lecture presentation include: MWO design environment, design
Analyst 3D FEM EM simulation featuring a preview of V11, VSS featuring an enhanced radar library and novel radio
frequency planning wizard, RFP AWR Connected to National Instruments.
is a short primer by Daniel Chow on the basics of
digital signal spectra (EDN website). It begins with the Fourier transform of
a single rectangular pulse and progresses through the spectrum of a series of data pulses and of non-rectangular
and the name David Sarnoff seem to be showing up a lot lately, at least in the venues I travel for technical reading.
I don't see particular dates mentioned that make this the anniversary of anything related. Ironically, this mention
of the two names together adds to the phenomenon. The October 2013 edition of IEEE's Spectrum magazine
has a nice spread titled, "Electronic
Treasures of the David Sarnoff Collection." RCA, the Radio Corporation of America, was founded in 1919 in
Princeton, New Jersey (home base of Mr. Einstein, amongst other notables). David
Sarnoff, chairman of RCA, was the son of a Jewish immigrant. Although neither a scientist nor an inventor himself,
Sarnoff established a record of ambition and business savvy from a young age - although he was an accomplished
telegraph operator (participated in the rescue efforts of the Titanic)...
over 40 years KR Electronics (an RF Cafe supporter since 2009) has designed and
manufactured high quality filters for the commercial
and military markets. KR Electronics manufactures all filter types and individually synthesizes filters for
special applications. State of the art computer synthesis, analysis and test methods are used to meet the most
challenging specifications. All the standard topologies are supplied along with diplexers, linear phase, group
delay equalizers, and many custom designs.
is another exciting episode of the sleuthing adventures starring Popular Electronics' tech savvy teenagers,
Jerry. The Hardy Boys of electronics are the creation of author John T. Frye, who created short story adventures
for many years - long enough to at one point require a major modification in their appearances to reflect more
modern attire and eyewear. This particular adventure begins with Carl considering whether his ham radio hobby
is more useful from its technical aspects or its social aspects.
Microwave Week is the largest Event for the RF & Microwave Industry in Europe. This year it is being held
in Nuremberg, Germany from the 6th to the 11th of October. There are over 200 Companies that are taking part in
the exhibition here. Today's newsletter lists some new products that have been announced this week at the EuMW
devices based on the Peltier effect were first demonstrated by French physicist
Charles Athanase Peltier when he noted the presence of heating or cooling at an electrified junction of two
different conductors types (opposite of a thermocouple). Widespread commercial use
depended on finding efficient materials that could be produced inexpensively. Music synthesizers, to be practical,
needed to await the availability of miniaturized electronics like transistors and memory elements. Light amplification
similarly depended on affordable sources to be anything more than a laboratory curiosity. Fortunately, by the
mid 1950s such entities were becoming reality. This article reports on a few of those items.
2013 Bible, by John Walkenbach. Engineers still rely pretty heavily on spreadsheets for day-to-day work. The
full-featured simulators are invaluable for detailed simulations, but often are severe overkill for a quick calculation.
Known as "Mr. Spreadsheet," Walkenbach shows you how to maximize the power of Excel 2013 while bringing you up
to speed on the latest features. This perennial bestseller is fully updated to cover all the new features of Excel
2013, including how to navigate the user interface, take advantage of various file formats, master formulas, analyze
data with PivotTables, and more.
inspection capability is a vital tool not just in medicine busigat in industry. During my tenure with a major
cellphone power amplifier company as an RF Applications Engineer, I relied heavily on x-ray imaging for many of
the teardown reports that I wrote on competitors' products. It included everything from determining metal layers
in integrated circuits to deducing multi-layer ceramic PCB routing lines and distributed components to just getting
a quick look inside a shielded enclosure without needing to disassemble it. A skilled x-ray technician can make
a huge difference in the quality of information that can be gleaned from the images since angle, power level,
and focusing takes a deft touch. My first experience with using x-rays for inspection was while doing automated
test system design for production base station equipment companies. Very stringent PIM...
something cant be explained off the back of an envelope, its rubbish." -
Branson, Virgin CEO
microwave specializes in high quality, high frequency microwave communication
components up to 60 GHz. As a pioneer supplier of microwave RF components, the main products include
directional couplers, bias tees networks, power dividers/combiners, 3 dB hybrids 90° and 180°, microwave
mixers, frequency doublers, load terminations, and coaxial connectors and adapters.
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.
soldering is almost as much of an art form as it is a technical skill. Having been through numerous soldering
classes in my career, starting with electrical vocational courses in high school, then again in USAF technical
school, and other times while working as a technician and engineer, I always exercise care in making solder joints.
Proper preparation - including both tinning of mating surfaces and a means to prevent the joint members from moving
during cool-down - is of utmost importance for assuring a nice, smooth, shiny joint with just the right amount
of solder. Lead-free solders do not tend to produce the level of shininess as do the good old 60-40 type tin-lead
solders, but you can still make a nice looking joint. This might be more information than you want to know about
me, but I even strive for perfection in solder joints in copper pipes and fittings used in plumbing work. Call
me a masochist, eco-villain, or worse, but...
May 1st, 2013, DCH Systems, EIN 20-4638136 and Triad RF Systems, Inc., EIN 27-3907731, merged into one
entity with the Triad RF Systems, Inc. name surviving. Triad
RF Systems is fully owned by three (3) partners: Dean Handrinos, Steve Barthelmes, and David Campbell. Triad RF
Systems, was formed with the objective to solve the problem of high power amplifiers (HPAs) being the Achille's
heel in most RF radios. We have solutions for integrating high performance HPAs into sophisticated RF subsystems
and systems without sacrificing efficiency and linearity. Triad RF Systems serves all areas of the RF and Microwave
industries including military, satellite and commercial communications.
are a lot of audiophiles
in the RF Cafe audience, so this 10-question quiz about audio topics from Popular Electronics should prove useful.
It covers not just the physical aspects but also some simple electronics concepts, like decibels of gain, crossover
networks, push-pull amplifiers, etc. Enjoy.
Model No. PEC-42-1G40G-20-12-292FF is a 1.0 to 40 GHz,
low noise amplifier that provides 42 dB of gain typically with a typical noise figure of 5.5 dB. The
OP1dB is typically +22 dBm (1.0 to 18.0 GHz) and +19 dBm
(18.0 to 40.0 GHz). The maximum input power rating is +17 dBm CW and the
operating DC supply is 550 mA at +12 to +15 VDC. This unit is supplied in a package measuring 1.37"
x 1.0" x 0.6" with 2.92 mm female connectors.
Test is a trusted source providing sales, rentals and leasing of
refurbished electronic test and measurement equipment
to the R&D, manufacturing and quality assurance industries. We carry a full range of used test equipment from
manufacturers such as Agilent, Ando, Anritsu, Fluke, HP, Keithley, Lecroy, Rohde & Schwarz, and Tektronix.
Recover 30%-40% more on your idle test equipment rather than selling to a dealer.
Corporation, the innovation leader in high-frequency electronic design automation (EDA),
announces that NXP Semiconductor's ultra-wideband (UWB) Doherty reference design
is now AWR Microwave Office design environment ready. The updated release features NXP’s BLF884P and BLF884PS
transistors for ultra-wideband Doherty power amplifiers operating from 470 to 806 MHz and a 70 W DVB-T UWB LDMOS
reference design using NXP’s patent-pending architecture capable of operating over an ultra-wideband spectrum
in the UHF broadcast spectrum.
Ohms is a regular feature of the Design News website where readers submit anecdotes from their on-the-job
experiences. There has been a tendency lately in this column and, to a lesser degree, in the similar Tales
from the Cube column for situations involving newer, less experienced engineers being frustrated by the domineering
attitudes of some senior engineers. In contrast, I cannot recall an instance of a story where the senior engineer
dumps on stupid actions of a newbie. Maybe doing so is considered bullying or akin to a guy hitting a girl. Regardless,
all the stories in both columns are good for instruction...
tubing load cells are used for measuring the insertion force of small diameter (typically
0.5 to 4.5 inch) stainless steel tubing that is inserted into the borehole / wellbore at the wellhead.
A borehole is any hole drilled for the purpose of exploration or extraction of natural resources such as water,
gas or oil where a well is being produced. The coil tubing (CT) is usually installed
when the well, which has been drilled, is deemed ‘viable’ and will produce the natural resource in a productive
and economic manner. Coil tubing provides intervention allowance of vertical, horizontal, highly deviated, and
live wells(1). Adding...
white paper has been published by Linx Technologies titled, "How
to Understand an Antenna Data Sheet." Author, Shawn Hogan, VP of Engineering, writes, "The information on
an antenna data sheet is nothing short of overwhelming. It can be difficult to maneuver through to select the
best antenna for your design. There are several factors to take into account when looking at an antenna data sheet
including: monopole vs. dipole antennas, the electrical parameters, counterpoise, gain and radiation pattern.
Our goal is to break down these features so you can use that knowledge to discover advantages and disadvantages
of different antennas as they relate to your specific application..."
you seen the new national advertising campaign where Freescale (formerly Motorola)
is using big name celebrities to sell their cellular base station power transistors?
and Ashton Kutcher are up on a tower along with man-and-woman-on-the-tower smartphone users discussing how
much better their phones work now that the service provider switched to base transceiver stations that use Freescale
LDMOS RF power transistors. Of course you haven't seen the ad because it would never be produced and marketed.
The very concept is ridiculous, you might say... unless you happened to see advertisements like this one for RCA's
Radiotron vacuum tubes from the 1930s. In it, none other than Bing Crosby...
Test Equipment Rentals just issued their
newsletter for October 2013. It includes hot topics in the tech news world and highlights of new or special function
test equipment they have available. Please click on the thumbnail to access the original versions.
Microwave is an innovative designer and manufacturer of high performance integrated circuits,
modules, subsystems &
instruments for technically
demanding digital, RF, microwave and millimeter wave applications covering DC to 110 GHz. The Company's
standard and custom products apply analog, digital & mixed-signal semiconductor technologies used in a wide
variety of wireless / wired communication and sensor applications for automotive, broadband, cellular infrastructure,
fiber optics, microwave & mm-wave comms, military, test & measurement, and space markets.
next generation hardware and software innovations that are part of Empower's "size matters" architecture, several
unique configurations of these
HPAs are being shipped
to key customers. This particular set of HPAs build on the size, weight and power advantages already demonstrated
with commercial product releases in the broad market, "size matters" product family. This recent and unique
SATCOM solution delivers 2 kW P1dB
(CW, digital modulated signal) in L-Band and a companion product delivers 800 W P1dB
(CW, digital modulated signal) in S-Band. The 2 kW L-Band HPA is a GaN based
design and housed in an amazingly small 5U chassis.
involved as an
Witness for a court case involving product liability and/or IP ownership or infringement is a unique experience
according to those who have been through it. Having competent and renowned legal representation is paramount to
success, particularly if your opponent is
IMS ExpertServices is a law firm specializing in expert
witness cases. Every month or so they send me an article about specific court cases that could be of interest
to RF Cafe visitors. This particular article is titled "Federal Circuit Ponders Abandoning De Novo Review." Overturning
precedence is notoriously difficult since doing can have ramifications that reach way back in time and can trigger
appeals to long-settled court cases. This potential for the overturning of a patent infringement case from 1998
based on how it was constructed is predicted to trigger significant consequences for past and future litigation...
goal at Vida RF is to design and manufacture a reliable and cost-effective
RF / Microwave Component that fits each customer's individual
application. Vida RF has the capability to produce large volume as well as quick turnaround for your custom
designs, and they will provide the highest standards of quality products, competitive prices, quick turnaround
and exceptional customer service. RF connectors, cable assemblies, power dividers, RF adapters & terminations,
fixed attenuators, dust caps, directional couplers, and i isolators & circulators are among their offerings.
technically oriented types often think of those with an artsy-fartsy bent as ones who run for the tall grass
when topics of science and/or mathematics arise. Other than engineers, scientists, financiers, etc., I would say
in most cases it is justified - but not always. In the September 2013 edition of Strings magazine, an article
titled, "How the Violin Altered Our View of the Universe" appeared where
author Paul Stein, a violinist, educator, and member of the Los Angeles Philharmonic, evidenced a very good grasp
of science and math principles. The very decision to pen such an article had to have been born of a knowledge
and comfort with the aforementioned. A subtitle of, "Physicist & violinist Albert Einstein's cosmic orchestra
resonates with the music of the spheres," proves familiarity of Isaac Newton's "Music of the Spheres,"
(Musica Universalis) ...
Electric Vehicle Conversion Handbook, by Mark Warner, is a guide on how to convert any gas- or diesel-powered
vehicle to electric power. Includes ownership advantages, basic EV operation, subsystems, components, basic EV
operation, project vehicles, and conversion kits. Motor and battery technology is advancing at amazing rates,
so if you don't like the weenie look of today's production electrical vehicles and would rather try your hand
at an electric conversion on a classic 1965 Mustang, then this type of resource can be invaluable.
Cahak, owner of Sunshine Design Engineering Services, has submitted another fine article for posting here. Joe
has many years of automated RF testing experience to leverage when writing this paper on the basics of power measurement.
A power measurement is a
scalar quantity and is a measure of power detected. These measurements can be made a variety of ways. Most of
us are familiar with the notion that voltage (volts) multiplied by current (amps) is power (watts) and power multiplied
by time is energy. At DC or low frequencies these power measurements from the current or voltage is relatively
easy and not very complicated...
quiz is based on the information presented in
Microwave Mixer Technology and Applications, by Bert Henderson and Edmar Camargo.
Some of these books are available as prizes in the monthly
RF Cafe Giveaway. Based on
a review of over one thousand patents on mixers and frequency conversion, the authors have written a comprehensive
book for mixer designers who want solid ideas for solving their own design challenges. Many of the important and
most interesting patents and related circuits are discussed in the several application oriented chapters.
have always maintained that, excepting fools, men did not differ much in intellect, only in zeal and hard work;
and I still think there is an eminently important difference." -
Charles Darwin, letter citing R. Pearson (1914-1930) in The Life, Letters
and Labours of Francis Galton,
you think of radio pirate, most likely what comes to mind is a rogue, unlicensed transmitter that is re-broadcasting
copyrighted material, syndicated shows, etc., on radio or television. Nowadays that would also include the Internet
as a medium. Did you know that, at least decades ago, the British government (and maybe
others) charged citizens a
fee for listening to broadcasts
on their household radios? That's right, if you wanted to listen to the BBC, you would kindly remit a fee of 10
shillings per year. Otherwise, you were apt to have government inspectors descend upon you and padlock your radio
set - or collect the requisite 10 shillings on the spot. After a growing number of suspected dishonest British
subjects finally exceeded the reasonable level of tolerance of the government, a clever scheme was devised to
trick evil citizens into divulging their nefarious crimes...
Rohde & Schwarz is
one of the world's leading manufacturers of test & measurement, communications and broadcasting equipment.
analyzers, and signal generators for analog, RF, microwave, and mm-wave signals with a standards, modulations,
and functions available at up to 43.5 GHz.
for RF, analog, mixed signal & digital integration, and software development & production up to 4 GHz
BW. RF Power Meters
up to 110 GHz.
people, according to surveys, consider starting their own businesses at some time during their working years.
The risk of failure and the cost of startup are what prevent most elsewise entrepreneurs from taking the leap
of faith in their own abilities. Not everyone is cut out for running a business whether it be a one-person venture
or a conglomerate with a payrolls of hundreds. Knowing and heeding your own limitation in deciding to remain under
the employ of another company is as virtuous and sound a reason for dismissing thoughts for self-employment as
is having the knowledge and will to strike out on your own. A lot of business are started on the sideline while
being employed fulltime in a regular job. Indeed, that was RF Cafe's origin. It wasn't until I had confidence
that I could subsist on RF Cafe's revenue level that I left the security of the best engineering job I ever had
to tend to the website full-time (at a substantial reduction in pay, I will add).
Every year or so, Inc
magazine does a major poll of successful entrepreneurs to find out what motivates them (2013
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.
RF has more than 22 years of experience designing power combiners and dividers, directional couplers, hybrid couplers,
filters, and power amplifiers. Their research and development group and engineering team constantly introduces
new, top of the line products into our RF and microwave components
Microwave announces a new line of in-stock
Zero Bias Schottky Diode Detectors.
Diode Detectors are used to rectify an RF input signal to a proportional DC output voltage. Applications
for Zero Bias Schottky Diode Detectors include precision and lab testing equipment, as well as transmitter, power
and signal monitoring systems. Fairview's new line of Zero Bias Schottky Diode Detectors comes in several different
connector configurations and frequencies in the 0.01 to 26.5 GHz range.
is the phone number for signing up for America's new Affordable Care Act. Do you believe it is just a coincidence
that it spells out "1-800-F1U-CKYO?"
I kid you not. From what information I could find, the lowest cost plan for Melanie and me is the Bronze plan,
which will cost $9,481 with a $12,700 deductible (only 60% coverage after deductible is
met). My current private plan through BCBS with a $7,000 deductible (90% coverage
after deductible is met) is only $4,971. So, beginning in January 2014 that represents a 91% increase in
cost and a $5,700 higher deductible, plus only 60% coverage after the deductible is met. I do not qualify for
any subsidy. To all my fellow Americans that voted for this crap - thanks a lot!
to solve calculations is not as common in today's world of portable high-powered computers as it was when computers
used vacuum tubes or even mechanical gears. One exception might be the Smith chart, especially in the lab or field.
You can plug numbers into a programmable calculator or tablet app, but having the solution presented in the form
of a number gives you only that - a number. That's usually good enough, but if you are doing troubleshooting or
tweaking a design, being able to see how the value got to be what it is by seeing what's around it can be very
helpful. The Smith chart is a particularly good example when watching the complex impedance point move around.
The more experience you have, the less you need such devices, but newbies...
you in the market for a new job as an intern, part-time, temporary, or full-time worker and are not quite sure
how to go about finding out where the kind of employment you are seeking is located? Wouldn't it be nice if you
could simply drive or walk around town and any place that fit the bill would be highlighted for you automatically?
Nokia has an app for that, and it's called JobLens™. Using
what is termed "Augmented Reality," JobLens assimilates a multitude of social networking services like LinkedIn,
Facebook, Twitter, Indeed, Here Maps, Windows Live, Salary.com, Zillow, CareerOneStop, Data.uk.gov, Payscale,
and other best-in-class content partners along with other location-dependent resources to pinpoint targets for
investigation. It might be a little underpowered when looking for an engineering type position...
God, man! Drilling holes in his head isn't the answer! Now put away your butcher knives and let me save this patient
before it's too late!" Those classic words were uttered by Dr. McCoy in Star Trek IV: The Voyage Home,
after Lt. Chekov (promoted from Ensign after the TV series) sustained brain damage
as a result of falling from a 'nuclear wessel' when 20th century naval surgeons were about to open his skull to
relieve pressure from swelling. Looking at these images from a 1932 article on using
radio waves "to produce protective
fever in killing germs of a number of diseases." Update: I have been informed that
shortwave diathermy is still used in modern medicine! 10 to 30 meters was a popular wavelength band
at a power of about 500 watts. The patient's body part to be treated is placed between the plates to act "as a
dielectric" while the liquids are heated via induced oscillations similar to how a microwave oven...
succeed in automotive racing, a commitment is required... a commitment to always ask for more and to never settle
for less. Continual improvement is necessary to stay ahead of your competition and win. This drive to be the best
is part of Interface's DNA, from our product and service offering to the dedication of our employees. Accurate
force measurement is a vital requirement of the automotive industry
and in the competition arena, performance demands are pushed even higher. Interface takes great pride in being
a leading solutions provider in these applications. Whether it's for NASCAR, IndyCar, or even the amateur level,
engineers rely on Interface.
apparatus of today, including television, uses practically all of the physical phenomena capable of being controlled
by science." That is the opening line of a 1932 article discussing the relatively new technology dealing with
AND controlling of electrical charges. Investigators were beginning to develop formulas and physical
rules for the behavior of electrons - at least in accordance with the accepted Rutherford-Bohr atomic model. It
wasn't until 1929 that Robert Van de Graaff invented his eponymous generator, before which scientists like Volta
used an electrophorus (Latin for "electricity bearer") to generate static electrical
charges for experimentation by beating a metal disc with an animal skin...
Engineering, an international RF and embedded systems solutions
provider, announces it has achieved both ISO 9001:2008 and AS9100:2009 Rev C certifications for its Quality Management
System by EAGLE Registrations Inc. "NuWaves is excited to join the top tier suppliers in our industry with these
highly respected quality certifications," said Jeff Wells, President and CEO of NuWaves Engineering. "It's a testament
to our employees and their dedication to delivering quality products and services to our customers each and every
F., of Ft. Collins, CO, is the September 2013 book drawing winner. Greg selected Introduction to Antenna Analysis
Using EM Simulators. This book was graciously provided by
Engineering is an EMC testing and certification facility
located in Knoxfield, Australia. They have a few nice online RF calculators that might be useful to you.
dBm, dBuV, W, dBuV/m,
pJ/cm2, V & VSWR
ERP, EIRP, dBuV/m, dBm & mW
V/m, dBuV/m, dBuA/m, pT,
dBpT, Tesla, Gauss, A/m,
mW/cm2 & W/m2
Technologies is pleased to announce its launch of the
TM Series Global Navigation Satellite System (GNSS) receiver modules. At a very
small size of 10mm x 10mm, the TM Series GNSS receiver module is a self-contained, high-performance Global Satellite
Navigation System receiver designed for navigation, asset tracking and positioning applications of all kinds.
Based on the MediaTek chipset, it can simultaneously acquire and track several satellite constellations. These
include the United States GPS system, Europe’s GALILEO, Russia’s GLONASS and Japan’s QZSS.
manufacturer Ametherm has three application notes
that address the problem of limiting inrush current.
How to Stop Inrush
Current: Design considerations for inrush current protection of the AC current applicable to switching power
Current Protection: A convenient solution to deal with the problem of inrush current exceeding saturation
current in transformers.
Thermistor Protection for a Precharge Circuit on Lithium Ion Batteries: When a battery is connected to a load
with capacitive input, there is an inrush current surge as the capacitance is charging to the battery voltage.
Monolithics Industries (PMI) has been set up to manufacture and market various MIC/MMIC
components, supercomponents, and subsystems for applications in telecommunications, terrestrial, satellite, and
mobile-radio communications, defense (ECM, ECCM, ESM, radars, and EW), cable-TV,
navigation and marine electronics, FAA/DOT-avionics, ground based systems, and microwave landing systems.
of this writing, at least 863,790 people believe the concept of a modular, upgradable, personalized smartphone
is a good enough idea to invest their support in it. With 28 days left to go, the Phonebloks
developers are already at 95% of their crowdfunded revenue goal. As I reported a ways back, while Kickstarter
was the first crowdfunding venue to receive wide publicity, there are now many such options for soliciting project
startup cash. The Phonebloks team chose Thunderclap. Thunderclap is not actually a crowdfunding source but a 'crowdspeaking'
scheme for gathering enthusiasts for your idea. If enough people support your project, Thunderclap will blast
out a timed Facebook Post or Tweet from all your supporters, creating a wave of attention... for what it's worth.
Phoneblok's concept is based on the belief that the current throw-away philosophy for electronics devices - cellphones
in particular - is wasteful not just in terms of money but in terms of...
Solutions introduces four
amplifiers for LTE and WCDMA applications. The fully matched surface mount SKY66001-11
(2110-2170 MHz), SKY66002-11 (1900-2025 MHz),
SKY66005-11 (850-920 MHz) and SKY66008-11 (900-990 MHz)
modules meet the stringent spectral linearity requirements of femtocell applications with high power-added efficiency. An
integrated directional coupler eliminates the need for any external coupler.
Electronics has released new designs for a 710-716 MHz / 740-746 MHz bandpass combiner, a 4.4 to 5 GHz
surface mount isolator, a 769 to 775 MHz bandpass filter for Public Safety, and a 2500 to 2570/2620 to 2690 MHz
cavity diplexer. All can be ordered directly through our AMCrf
Microwave is a professional supplier of Microwave/RF components,
for WiFi, Cellular, Bluetooth, GPS, DVB-T/S/C, Satellite Communication and related fields. A strong global channel
and design group devoted to development and innovation to meet various changeable market needs. We strive for
low cost, fast service, best prices, highest quality and "marvelous" service. Attenuators, connectors and cables,
amplifiers, filters, and RF switches are among their many offerings.
Warfare in the Information Age, by D. Curtis Schleher. This is an advanced practitioner's guide to current
concepts and threats associated with modern electronic warfare (EW). It identifies
and explains the newest radar communications threats, and provides practical, "how-to" information on designing
and implementing ECM and ECCM systems. The aim of the text is to help the reader develop ESM systems designed
specifically to exploit the vulnerabilities of modern radar. It also identifies and evaluates ESM receiving equipment,
and outlines advanced ECM methods, including monopulse deception, coherent radar jamming, and high-ERP generation.
Internet of Things is a term that is appearing with much frequency these days (e.g., in
this article). Akin to 3G and 4G, the definition does not seem to be very well defined; that is to say
more subjective than objective. Per Wikipedia's entry: "The
Internet of Things refers to uniquely identifiable objects and their virtual representations in an Internet-like
structure. The term "Internet of Things" was proposed by Kevin Ashton in 1999. The concept of the Internet of
Things first became popular through the Auto-ID Center at MIT and related market analysts publications. Radio-frequency
identification (RFID) is often seen as a prerequisite for the Internet of Things.
If all objects and people in daily life were equipped with identifiers, they could be managed and inventoried
by computers. Besides using RFID...