How's the Industry?
Check Out the Applications
Looking for a simple projection about the health of RF and microwave industry in the coming year? It
doesn't take a crystal ball or massive amounts of research, but simply a tally of the various RF and
microwave-centric activities that are in development or being deployed. There's a lot more going on than “4G”,
“LTE”, and the rest of the hoopla surrounding the next generation of wireless personal communications.
Unfortunately, it gets drowned out by the one RF and microwave-driven technology people can relate to, even
though there are dozens, perhaps hundreds of other applications that if not as sexy are no less viable.
For example, RF and microwave technology is the foundation for RFID, adaptive automotive cruise control,
WiFi, Bluetooth, ZigBee, radio and television broadcasting (including Mobile DTV and electronic news
gathering, ENG), land mobile radio and various other flavors of public- safety oriented communications,
medical devices (including magnetic resonance imaging, patient telemetry, implanted medical devices, cardiac
ablation, and global availability of patent records, etc.), avionics, airport/aircraft and weather radar, air
traffic control, and satellite communications. And that's far from all of them and represents only the
commercial part of the market.
None of these commercial markets are in decline, and some are growing
nicely and expected to continue to. Defense RF and microwave applications are broad and deep and regardless of
the outcome of the federal budget, not likely to be savagely dismembered. Put them together with new wireless
deployments (including WiMAX, white spaces, and even millimeter-wave applications), and there's your research
report. The headline might be “Microwave industry growth projected to continue”.
Answers to last month's Sports Trivia Questions
1. What Native American language was Super Bowl XXX the first to be broadcast in?
2. What disorder did Muhammad Ali develop after years of catching blows?
3. What are the only three European countries to have won soccer's World Cup?
England, Italy, West Germany
4. What position must college footballers play to receive the Davey O'Brien Award?
Sports Trivia Questions!
1. What sport did Herve Filion top with a record of 14,084 wins?
2. What team hired the NFL's first
professional cheerleading squad, in 1972?
3. What diet drink was hyped by Coca-Cola for having only
only calorie, in 1963?
4. What country fielded 1996 Olympic women's teams that won gold in basketball,
soccer and softball?
|A Message from
THE PIM PREDICAMENT
Passive intermodulation distortion (PIM) is the type of
technical problem that gives the RF and microwave industry its unique character. It can be generated by bolts
and assorted other metallic objects that corrode or rust and act like diodes, spewing spurious signals -- thus
it's moniker as “the rusty bolt effect” and even a Wikipedia entry. It can also be caused by tiny scratches
and other discontinuities on or in passive components or even the mating of dissimilar metals or the metals
themselves. How many other technologies have such colorful technical problems?
Unfortunately, PIM is
also turning out to be one of the biggest problems facing base station manufacturers as they attempt to meet
the stringent requirements imposed by dense channel spacing and higher-order modulation schemes.
Adjacent-channel interference caused by PIM products falling into receive bands is a major problem not just in
the 700 MHz band being used for LTE “4G” but in other bands as well. Mitigating it requires the use of metals
that do not generate significant amounts of PIM, greater attention to the way passive components are installed
and later handled at the cell site, and fabrication steps by passive component manufacturers that have never
before given PIM as much thought.
Anatech Electronics has been aware of the increasing “PIM problem”
for years and has filters and other products specifically designed to meet the most challenging requirements
for PIM reduction. For more information about our cavity bandpass filters, duplexers, and other products
tailored for these applications, please call us at (973) 772-4242 or send us an e-mail at
Shrinking the Base Station
Recent announcements from two of the world's major wireless infrastructure players are very intriguing:
• Alcatel-Lucent's lightRadio architecture divides base station functions into their logical elements and then
distributes them into both the antenna and throughout a “cloud-like” network. The company's also has a way to
combine all antennas for 2G, 3G, and LTE systems into a single multi-frequency, multi-standard wideband
active-array that can be mounted on poles, sides of buildings or anywhere else there is power and a broadband
connection. The company thinks it can reduce a carrier's total cost of ownership and energy consumption by up
to 50% compared to current networks.
• Ericsson's antenna-integrated radio (AIR) combines the radio
unit and antenna to decrease power consumption and shrink base station size and thus more likely to be
considered less intrusive into their installed environments and more likely to be approved by zoning boards,
for example. Ericsson says the solution can be also installed in traditional cell sites up to 30% faster and
simplified cooling and reduced feeder loss can reduce power consumption by up to 42%.
It can be infuriating to find the answer to common conversion problems, even though some are available on
the Web. For that reason, we have just added an updated Technical Reference Workbook to both our custom
anatechelectronics.com, and our Web store, AMRrf.com.
Here are some of the functions this handy tool performs:
• Shows lowpass, bandpass, and highpass
filter responses, graphically and numerically, with changes in values
• Converts VSWR to return loss and
• Calculates values for directional couplers given several parameters
• Given a single value,
supplies values for resistive attenuators
• Calculates mixer conversion
• Converts noise figure to noise
temperature and vice versa
There's a lot more here too, so just click
and check it out!
If you have any questions regarding our products, or comments on our newsletter, please email us at:
IEEE 802.11ac is Coming
IEEE 802.11ac is a new Wi-Fi standard developed to provide speeds of 1 Gb/s, and research organization
In-Stat forecasts that shipments of 802.11ac-enabled devices will rise from nothing today to nearly 1 billion
by 2015. The goal of 802.11ac is to provide data speeds much faster than 802.11n with the first products
available by the end of 2012.
InStat also projects that shipments of mobile phones with embedded Wi-Fi
are projected to approach 800 million by 2015, that all mobile hotspot shipments will be 802.11ac-enabled by
then, E-reader Wi-Fi attach rates will increase from 3% in 2009 to 90% by 2015, and in 2012 Wi-Fi automotive
shipments will reach nearly 20 million. The information is part of an InStat report entitled “Wireless LAN
Market Estimates and Forecast by Device and by Technology 2009–2015 (#IN1105001WS), which covers the worldwide
market for WLAN by device and technology.
Weatherized 902 to 923 MHz Cavity Bandpass Filter
AB912B485 is a cavity bandpass filter with a passband of 902 to 923 MHz, insertion loss in the passband of
1.5 dB, out-of-band
rejection of 45 dB from 850 to 894 MHz and 931 to 950 MHz, and measures 80 x 140 x 53 mm. It has passband
ripple of less than 0.2 dB, return loss greater than 16 dB, and is weatherized for use in outdoor
1850 to 1910 MHz/1930 to 1990 MHz Cavity Duplexer
AD1880-1960D274 cavity duplexer has a first passband of 1850 to 1910 MHz and second passband of 1930 to
1990 MHz. Insertion loss in both passbands is 0.6 dB, and isolation between the two passbands is at least 40
dB. The duplexer has passband ripple of 0.5 dB, return loss greater than 15 dB, an operating temperature range
of -40 to +85 C, and measures 7.10 x 3.25 x 2.40 in.
5.8 GHz Bandstop (Notch) Filter
AS5800N322 bandstop filter has a notch center frequency of 5.8 GHz, notch bandwidth of 60 MHz, rejection
at the notch bandwidth of at least 40 dB, low-side
of 3 to 5 GHz, and high-side passband of 6 to 7 GHz. It measures 55 x 55 x 25 mm and uses SMA female
2 to 18 GHz Directional Coupler
is a directional coupler that operates from 2 to 18 GHz with
dB of coupling, directivity of at least 10 dB, insertion loss of 0.5 dB, coupling flatness of 1.4 dB, maximum
VSW R of 1.5:1 and handles 400 W average and 3 kW peak power. It
measures 4 x 1.2 x 0.93 in. and uses TNC (male or female) and Type-N female connectors.
products are available on our Web store, AMCrf.com range
of 10 kHz to 30 GHz and include cavity, ceramic, crystal, LC, and surface acoustic wave (SAW), as well as
power combiners/dividers, duplexers and diplexers, directional couplers, terminations, attenuators,
circulators, EMI filters, and lightning arrestors. The company's custom products and capabilities are
and standard products are available for purchase at the Anatech Electronics Web store,