have purchased a few geocaching Travel Bugs and would
like to get some of them planted outside the U.S. Each one consists of a Travel Bug strung together with a dog
tag having RF Cafe stamped on it. If you are a Geocacher and would volunteer to plant one of my tags, I will be
glad to mail one to you. One Travel Bug would like to go to each of the following regions, so please contact me
if you are interested...
Engineering, an international Radio Frequency (RF) and Embedded Systems solutions provider, announced today
that the company has added E.G. Holmes & Associates, Inc.
as an authorized representative of its commercial off-the-shelf (COTS) products and design services for the Southeast
region of the United States. With the signing, E.G. Holmes brings NuWaves over 50 years of proven results to NuWaves’
expanding sales representative network.
automated simulation-based design cycle has become a fundamental part of the success of one of today's leading
designers of travelling wave tube (TWT) microwave amplifiers. TMD Technologies produces a large range of TWTs,
a core component of many radar and missile seeker systems, electronic counter measure (ECM) and electronic warfare
(EW) systems. By using scripting tools built into Cobham Technical Services'
Opera electromagnetic design software, the company has created a custom tool that automatically builds a three-dimensional
(3D) model of a new TWT, simulates it and analyzes the results, all within the space of around five minutes.
Enterprises expands their line of high and medium output
RF noise sources. This
new line of noise sources is perfect for applications requiring reliable frequency levels up to 18 GHz. Pasternack
Enterprises' coaxial RF noise sources are diode-based microwave components that produce white noise for system
performance evaluation such as noise figure. This expanded line of RF noise sources have operating frequencies
ranging from 1-18 GHz and have a maximum noise output between 15-35 dB ENR.
article with instructions relating to subjects like overthrow, balance, friction, and cleaning could very well
be about a country's revolutionary struggles. In this case, it is an article about how to rejuvenate a persnickety
or inaccurate mechanical (aka analog)
meter movement. W.R. Triplett, relative
(I assume) of meter manufacturer Ray L. Triplett, is the author
(Triplett is now owned by Jewel Instruments). There are a lot of analog meters around
in labs, workshops, and garages. Unless they have been burnt out, most probably still work like new. Occasionally,
however, the movements get sticky because of accumulations of dirt and dust, bug filth, or even from corrosion.
This article offers some great tips for making them serviceable again. I have a Micronta
(Radio Shack) model 22-208 FET-VOM that I bought back in the late 1970s. I put a new 9V battery in it every
5 years or so and it keeps going like the Energizer bunny (in fact it now uses an Energizer
battery). Analog meters are more useful than digital meters, IMHO, when...
has been a leading provider of RF & Microwave noise generating
equipment used in commercial & military applications since 1985. We provide noise diodes, calibrated noise
sources, jitter sources, cryogenic noise standards, and computer controlled instruments for either Precision C/N,
or broad band white Gaussian noise. Noise Com provides off the shelf as well as custom designed noise testing
subjects pertaining to electronics - particularly vacuum tubes - are like music to your ears, then this poem titled
"What Is It?," from the February 1943 edition of
QST, should suit you just fine. The rhyming words are supplied by author Frank Judd; you just need to supply the
harmony. Poems like this one were actually quite common back in the day. In fact if you look through the list
of articles that I have posted from vintage QSTs, you will find half a dozen or more.
Electronics is a provider of RF & microwave test equipment including Peak and Average power meters, Modulation &
Audio Analyzers, RF millivolt & Capacitance meters, and PIM Test Sets. Peak Power meters have up to 70 MHz
of video BW, and 40 GHz of carrier BW. Modulation & Audio Analyzers provide analog measurements required
for radio sets. RF Millivoltmeters use an RF probe system that automatically loads calibration coefficients for
measurements to 1.2 GHz.
– everythingrf.com has now added RF calculators to the
website including RF Attenuation Calculator, VSWR Calculator, Microstrip Calculator, Coax Calculator, Wavelength
Calculator, Cascaded Noise Figure and Gain Calculator, Skin Depth Calculator, Inductive Reactance and Admittance
TXM119 is a 1.7 – 2.5 GHz, 5 W (P1dB)
PA module designed for COFDM Video link applications and general purpose use. The unit has 11 dB gain with
0.3 dB flatness across the band. Current draw is 750 mA at 1 W COFDM output. High speed switching
and over / under / reverse voltage protection are standard, and the units dimensions are 3.75 x 1.9 x 0.49 in.
decision was made by the United Kingdom in 1994 to produce 2-pound (£2) coins for general circulation. Public
input was sought regarding a theme for the design of the reverse face (back) of the coins; the obverse (front)
would feature the standard bust of the Queen. Four year later, the British Royal Mint issued its first coin. The
bi-color coins all have a nickel-brass (dark) inner component and a cupro-nickel (light) outer component. Designs
would tell the story, through symbolic devices, of technological development from the Iron Age to the Industrial
Revolution and from the Computer Age to the Internet. An edge inscription was included to identify the object
or event being commemorated. Designed by Robert Evans, the third coin in the yearly series pays tribute to the
contributions of Guglielmo Marconi. Per the British Royal Mint's website: "100th
Anniversary of Marconi's 1st Wireless Transmission across the Atlantic. Radio waves decorating centre and
outer border while a spark of electricity linking the zeros of the date represents the generation of the signal
designed by Robert Evans." The chosen design contains a rendition of Guglielmo...
sends out occasional e-mails with job hunting tips for technical types. Here are a few from the most recent. I
post only the useful ones to save you time.
What Not to Say During an Interview
Wearing Two Hats: The New Path to Promotion
U.S. House Votes to Expand Visas for High-Tech Workers
new RFFM8xxx series provide complete integrated solutions in single front end modules (FEMs)
for WiFi systems. The ultra-small form factor and integrated matching minimizes the layout area in the customer's
application and greatly reduces the number of external components. This simplifies the total front end solution
by reducing the bill of materials, system footprint, and manufacturability cost.
you’re designing broadband defense systems, HF, VHF, and UHF radios, or wireless systems that demand the lowest
possible IMD, Anatech has hundreds of standard power divider models to choose from. The two models below
are terrific examples of our design expertise at work and many more are available at www.amcrf.com.
We can also design custom models up to 32 GHz with high power handling ability and up to 32 ports.
Microwave Electronics specializes in designing and manufacturing state of the art RF/Microwave passive components
solutions including isolators and circulators, RF resistors, terminations, attenuators, multilayer chip ceramic
capacitors, feed-through capacitors, directional couplers, power dividers and combiners, 3dB Hybrid coupler etc.
Connectorized, surface mount, drop-in, and waveguide versions available.
It is no secret that 2012 has been a rather crappy year for the IC markets. Nevertheless, according to research
IHS iSuppli folks, communications IC maker Qualcomm ranks #3 this year, up from #6 last year after a 27% increase
could put in this room, DeForest, all the radiotelephone apparatus that the country will ever need." -- W.W. Dean,
president of Dean Phone Company, when DeForest pitched his audion tube.
week while sitting in the studio where Melanie takes her cello and piano lessons, I usually read technical and
hobby magazines, but lately I have been studying the ARRL General Class License Manual in preparation
for taking the written exam in a couple months. Last week a lady saw the book title and remarked, "I didn't know
radio people were still around." Wow. It would be tempting to blame her for being ignorant, or to blame the
ARRL (American Radio Relay League) for not adequately getting the word out, but the reality is that the mass media
does not consider Ham radio's contribution to be significant enough to cover in news stories. Amateur radio operators
perform a mighty service in times of trouble, but they do it so efficiently and effectively- without actively
seeking credit - that their efforts are lost in the noise. Ham radio operators have been on the front lines of
national and civil defense since World War II and even a bit before...
announced IEEE Wi-Fi 11n certification of its new scalable Wi-Fi 802.11ac silicon IP. The IP is available in a
broad range of configurations, supports 802.11n and 802.11ac specifications, single or multiple MIMO (Multiple-Input
and Multiple-Output) streams, and up to four transmit and receive antennas. In its simplest 1x1 configuration,
the IP is optimized for wireless sensors and many Internet of Things (IoT) applications requiring low power consumption.
For more complex MIMO configurations, the IP can achieve optimized throughput close to the maximum theoretical
values, and is ideal for applications such as smart phones, tablets, computers, digital TVs and set-top boxes.
C., of Lawrence, Kansas, is the November 2012 book drawing
winner!. Reid chose Robotic
Navigation and Mapping with Radar.
provided by Artech House
Fundamentals, by Mini-Circuits, Wednesday December 5, 11 AM ET. Outline: VCO Overview Functional
block concept, I/O relationships, basic performance metrics, center frequency tuning, 'constant' types of VCOs,
resonant (LC, SAW based, crystal) multivibrator, ring oscillator, Methods of tuning varactor drive strength (e.g.
charging current in multivibrator), phase adjust, second order performance metrics, v-f linearity, supply/load
sensitivity, phase noise, comparison of VCOs.
Microwave Corporation, a world class supplier of complete MMIC based solutions for communication & military
markets, has developed the HMC832LP6GE,
a 3.3V Wideband Fractional-N PLL with Integrated VCO that generates continuous fractional frequencies between
25 MHz and 3 GHz. The HMC832LP6GE offers
low power consumption of 560 mW while featuring industry leading phase noise and spurious performance. It also
includes innovative programmable performance technology that allows designers to further reduce current consumption
if demands on the noise floor can be relaxed.
Model No. PE2-25-7G10G-5R0-20-SFF
is a low-noise amplifier that operates over the frequency range of 7.0 to 10.0 GHz. This model provides gain
of 22 dB minimum with a maximum noise figure of 5.0 dB. The output power at 1dB gain compression is
+20 dBm minimum and the output OIP3 is +27 dBm minimum. This amplifier is supplied in our standard PE2
housing that can be used with SMA connectors or as surface mount.
the online magazines seem to now have columns where readers can tell of their personal experiences relating to
science and engineering. Design News has "Designed
by Monkeys" for that purpose. Sometimes a bit of humor is injected, other times you revel in the brilliance
of someone's troubleshooting skills, or roll you eyes at the gullibility of mankind. "RMS
Meter Saves Investor Big Bucks" is an example of the latter.
Telecom has fully instrumented microwave, millimeterwave, & antenna laboratories and production facilities.
Our professional engineers have backgrounds from telecommunications, electronics, space and aviation industries.
Frequencies up to 50 GHz, at globally competitive prices. Custom designs available.
PCB Design, AWR, Tuesday, December 4, 11 AM ET. Abstract: One of the most in-demand categories
of consumer products on the market are wireless telecommunication products. While many factors contribute to the
success of a great product, a well designed RF PCB can provide a significant boost, as the RF PCB can improve
a product’s performance, stability and reliability. There is a strong demand for RF professionals who possess
the knowledge and experience to design top-performing RF PCBs quickly and efficiently. This webinar offers insightful
knowledge on practical RF PCB design to improve one’s competence level and meet this demand.
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 (e.g.,
Cafe visitor Barry Carlin is looking for someone willing to sell a licensed copy of Eagleware's Superstar 6.5B.
Says Barry, "I have a reasonably large archive of linear circuit simulations created via Eagleware's Superstar
Version 6.5B. Unfortunately I no longer have access to the software. Do you know how I might locate
someone who might be looking to sell a copy of this software along with the hardware key? My PC operates
via Windows XP in 32 bit mode, so I should not have any difficulty running Superstar." If you can help, please
contact Barry at
you live in western Europe or the U.S., there is a good reason you probably feel like the future has moved on
to other places. This new interactive
Map of World Economies by the
Brookings Institution indicates the economic health of 300 cites based on how they are affected by the recession
and their growth rate over specified periods. Bluish indicates strong health and reddish is in the loo. You don't
need a larger version of the map (but go ahead and click on it anyway) to see which
parts of the world are doing things right. Hint: It isn't the U.S and Europe. Asia and Central America - the places
that make nearly everything we buy - are winning. While the winners concentrate on strong national policies for
their citizens, we funnel the resources of society's producers to whiny and militant special interest groups.
Demonizing everything that Western society built and worshiping everything else is the cause du jour. It's taught
in our schools and promoted by wealthy government
bureaucrats who are deeply invested in foreign concerns. If you like it this way, do nothing.
RF is a leading manufacture and supplier of
RF/Microwave Interconnect Solutions.
Headquartered in Orange County California, our components have been successfully proven in a diverse range of
applications including Telecommunications, Automotive, Defense, and Test and Measurement industries. These adapters
include the In-Series K-K or 2.4mm-2.4mm and the Between-Series, 2.4mm-2.92mm-3.5mm adapters. Low VSWR, durable
stainless steel composition, and frequencies up to 50 GHz (2.4mm) or 40 GHz (2.92 mm/K and 3.5 mm).
Storm Copper Components
800-394-4804 | Decatur,
Fabricates custom copper connectors for the wireless, telecommunications, power and alternative energy
industries. Serving engineers and OEM’s worldwide for 20 years, Storm has consistently provided its customers
with the speed and efficiency of advanced computer-controlled fabrication combined with expert craftsmanship and
Pinpoint Laser Systems
800-757-5383 | Peabody, MA
Manufacturer of precision laser measuring and alignment products for industry. Broad line of easy-to-use products
that incorporate lasers, optics, electronics, and solidly built mechanical features. Manufacturing customers in
many industries as diverse as semiconductor equipment to pet food, use these products which deliver measuring
resolution of 0.0001 inch and work over distances of 200 feet, for both routine and complex measuring and alignment
and Millimeter Wave Circuits and Systems: Emerging Design, Technologies and Applications, A. Georgiadis, H.
Rogier , L. Roselli, P. Arcion. The book provides a wide spectrum of current trends in the design of microwave
and millimeter circuits and systems, and identifies the state-of-the art challenges in microwave and millimeter
wave circuits systems design such as behavioral modeling of circuit components, software radio and digitally enhanced
front-ends, new and promising technologies such as substrate-integrated-waveguide (SIW) and wearable electronic
systems, and emerging applications such as tracking of moving targets using ultra-wideband radar, and new generation
satellite navigation systems. Each chapter treats a selected problem and challenge within the field of Microwave
and Millimeter wave circuits, and contains case studies and examples where appropriate.
Power Products designs and manufacturers high power 90° Couplers, Broadband Directional Couplers, Combiners,
Resistors and Terminations for the RF and microwave industries. Connectorized, surface mount formats are available.
Call for custom requirements or volume production information.
Upgrade Your Lights with Wi-Fi and Apps" That is the tag line for a Kickstarter™
crowdfunded project that seeks to commercialize a device
that screws into a standard light bulb socket and wirelessly controls a bulb (up to 100 W)
which is screwed into it. Evidently the product is already designed and tested, so all the development and marketing
team needs now is enough cash to do FCC certification (due to the switching power supply,
controller, and WiFi signal) and a production launch. As of this writing there are 1,162 Backers, and $92,189
has already been pledged toward the $250,000 goal. They have 13 days left to reach the goal, or the entire effort
has to begin all over. Spark needs a WiFi router within about 200 feet, and will only work with dimmable bulbs,
which includes Edison's evil Earth-killing incandescents, LEDs, and dimmable (but not standard)
CFLs. I did not see a target retail price. The team has a very well-done presentation for their effort.
Electronics today introduced the Model AS816N335 extremely high Q notch filter designed for 800 MHz GSM applications
that has extremely sharp transition characteristics from the stopband to the passbands, and extremely high rejection
of -70 dB making. It is an excellent choice for use in base station applications, either indoors or outdoors.
The Model AS816N335 has a notch center frequency of 816.5 MHz, notch of 816 to 817 MHz, low-side passband
beginning at 809 MHz and high side passband beginning at 821 MHz. Passband return loss is at least 18 dB.
announces the release of two new university success stories that reveal how students use AWR software to design
novel and award-winning microwave/RF products. Norbert
Leder of the Vienna University of Technology led a team in the design of a complex X-band transmission analyzer
using Microwave Office.
a student at Istanbul Technical University, used Microwave Office for his graduation design project. His award
winning final Wi-Fi low noise amplifier (LNA) design performed better than other commercially available designs
with lower noise figure and power consumption, to name a few key metrics.