|
STOP BY AT IMS2011
And see our filters for wireless applications
Baltimore
is a terrific place for a symposium, and we hope that if you are planning to
attend you'll visit us at Booth 4507 We’ll have filters, couplers, duplexers,
power dividers, and many other components for wireless applications on
display, along with members of our technical staff to describe them and
discuss your requirements.
DOWNLOAD OUR TECHNICAL RESOURCES!
How to Specify RF and Microwave Filters
This handy document provides an overview of filter types, including cavity,
ceramic, crystal, LC and SAW, and describes the applications for which each
type is best suited.
To download the PDF – click here.
Lumped-Element (LC) Filter Basics
Learn about the characteristics of the LC, or lumped element, filter, one of
the most common of all electromagnetic filter types. This document describes
response types, key parameters to consider when specifying LC filters, and
much more.
To download the PDF – click here.
Specifying Filters: Get it Right the First Time!
It’s often been said that no two filter applications are exactly the same.
That why it’s essential to understand their basic performance parameters in
order to specify a filter that can be realized in production and will deliver
the best combination of characteristics. This document provides insight into
various considerations and is useful for novices and veterans alike.
To download the PDF – click here.
Key Parameters for Specifying Filters
This handy guide lists all of the key parameters to consider when specifying
various types of filters, diplexers and duplexers, directional couplers,
circulators, and power combiners and dividers.
To download the PDF – click here.
Useful Definitions for Specifying Filters and Other Products
This document defines parameters that are important to understand when
specifying filters, filter-based products, directional couplers, power dividers,
and circulators.
To download the PDF – click here.
New Filter Calculator!
Automatically defines filter shapes and values, and key values for many
component types.
Use the calculator
|
Greetings {FIRST NAME},
A Message from Sam Benzacar
Just One More Job for
Filters…
The latest twist in the LTE market has “FILTERS” written all over it. A
company called LightSquared, funded by hedge fund billionaire Phillip Falcone
through Harbinger Capital Partners and run by the former CEO of French
telecom giant Orange Group, is about to offer industry’s first wholesale LTE
offering. Instead of providing its own service it will sell its capabilities
to others (Best Buy is already onboard) to create their own branded services.
The LightSquared network will use a single, massive, satellite built by
Boeing (one of the largest ever built) and 40,000 base stations to be built
by Nokia Siemens Networks to provide coverage throughout the U.S.
The problem is that LightSquared’s base stations are not your average
variety. They will operate at L-band Mobile Satellite Service (MSS)
frequencies right next to GPS frequencies and will reportedly have RF outputs
of 12 kW or more. Obviously, as signals from GPS satellites are very weak and
the signals from the LightSquared base stations will be very strong it seems
certain that interference will be an issue. Even if LightSquared keeps
spurious and harmonic emissions incredibly low, at 12 kW (and this may not
even be EIRP), they’d have to be way, way down to eliminate interference.
Nevertheless, apparently fulfilling its goal of offering broadband
everywhere, the FCC has given the company the green light to proceed IF it
can provide significant proof that its signals will not cause interference.
Obviously, a lot of people think the plan is a potential for disaster, as GPS
is first and foremost a defense platform and second a platform on which
commercial services and products are attached. It is, they feel, under threat
by the LightSquared network. GPS was located in a quiet portion of L-band
that is comparatively unpopulated by high-power services. That is, until now.
As Bradford Parkinson, emeritus professor at Stanford University’s
Aeronautics and Astronautics Department, was quoted as saying in Aviation
Week, “Effectively, the FCC is directing that a quiet-spectrum neighborhood
be rezoned for concert rock bands at the threshold of pain. And LightSquared
is suggesting that its current neighbors simply add more insulation to their
houses.”
Regardless of how this shakes out, unless LightSquared flops filtering has
just become a lot more important for designers and users of GPS systems.
Typical GPS filter skirts will have to become sharper on new and existing GPS
systems.
Anatech Electronics is here to help. We’ve been designing and manufacturing
filters for GPS, INMARSAT, and many other commercial and military satcom
systems for more than 20 years.
To find out more, call us at (973) 772-4242 or send us an e-mail at sales@anatechelectronics.com.
Sports Trivia Questions!
1. What NBA team plays home games in the Alamo dome?
2. Who was the first female jockey to win five races in one day at a New York
track?
3. What woman won five U.S. figure skating titles from 6 to 173, but never an
Olympic gold medal?
|
WHAT’S NEWS…
Finally, a logical article on mobile phone safety
Is there a significant health risk associated with long-term exposure to
electromagnetic radiation from mobile phones? It looks unlikely – but not
impossible. One thing about this contentious debate is clear: everyone
involved has an agenda. A recent article in the New
York Times is one the most comprehensible, honest, and informative we
have ever seen. It presents all sides of the issue in clear terms and lets
readers draw their own conclusions. It’s excellent reading for anyone even
remotely interested in the issue. The author is Siddhartha Mukherjee, an
assistant professor of medicine in the division of medical oncology at
Columbia University, and author of “Emperor of All Maladies: A Biography of
Cancer" which just won the Pulitzer Prize for general non-fiction. It’s
excellent reading for anyone even remotely interested in the issue.
3 Billion+ Asian Mobile Subscribers by 2015?
A recent report from InStat (www.in-stat.com)
predicts that by 2015 there will be more than 3 billion cellular
subscriptions in the Asia/Pacific region, 10 million LTE subscribers in the
U.S. by the end of 2012, and 100 million 3G Eastern European subscribers in
2013. Another interesting prediction from InStat is that global CDMA2000 Rev.
A subscribers (in the U.S. that’s Verizon and Sprint minus their “4G”
offerings) will peak at 130 million and decline thereafter, as the carriers
transition to LTE.
4G on a Roll
According to an article in Above
Ground Level magazine, Verizon Wireless will add 59 more markets to its
4G LTE network by the end of the year, which added to the 39 launched in
December and 49 in January brings the total to at least 147. T-Mobile USA
claims to have achieved "theoretical" throughput of 42 Mb/s in the
Las Vegas, New York, and Orlando markets, twice that of current “theoretical”
rates. This will be followed by Chicago, Long Island, and Northern New
Jersey.
In Brief
• It’s apparently real: The long-awaited white iPhone is
apparently “real” and soon to be offered for sale: PC
magazine
• New from DoD: High-Powered Microwave Weapons. Aviation
Week
Answers to last month's Sports Trivia Questions
1. What decade saw names first appear on the back of NFL jerseys? The 1960's
2. What position must college footballers play to receive the Davey O'Brien
Award? Quarterback
3. What racing competition became a best-of-nine series in 1995? The America's Cup
|
