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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Anatech Electronics Newsletter - December 2013

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Anatech Electronics has published its December 2013 newsletter. As always, it includes both company news and some tidbits about relevant industry events, regulations, and standards. This month, Sam Benzacar offers his views on the subjects of small cell backhaul growth, distributed antenna systems (DAS) growth, and the large amount of potential for interference caused by densely populated small cells.

WHAT'S NEWS
 
Mouse image - RF CafeSmall Cell Backhaul Growth to Skyrocket

ABI Research expects the market for small cell backhaul equipment to grow to over $5 billion in 2018, up from $487 million for 2013 - a 48% compound annual growth rate. Equipment operating below 6 GHz will represent 47% in 2018 although millimeter-wave systems will increase the fastest, with a growth rate of 113%, reaching $668 million. Although lower-frequency microwave equipment has the greatest share (34%) at $1.8 billion, frequencies at 60 GHz and 80 GHz will become viable thanks to their broad bandwidths.

Talk to TJ3Sat – Built By High School Students

High school students have for the first time built a satellite, which is currently orbiting Earth after being launched by a U.S. military rocket from Wallops Island, Va. -- and you can even send it a text message. The transponder uses a voice synthesizer that transforms text to audio that can be heard in different languages at 437.32 MHz throughout the world. The 2-lb. spacecraft is called TJ3Sat and was built by a team of 50 students over the past seven years at the public Thomas Jefferson High School for Science and Technology in Alexandria, Va., along with volunteers from its corporate sponsor, Orbital Sciences. The “cubesat" is about the size of a Pop-Tarts box and is orbiting the earth at an altitude of 310 miles and is expected to be fully functional for at least three months. When it finally runs out of fuel its voice synthesizer is programmed to say “I'm melting.” Get more information by clicking here.

DAS Growth Expected to be 300% Through 2017

The market for growth of distributed antenna systems (DAS) is expected to grow by 300% through 2017, according to market research firm iGR Research. The report also forecasts capital and operating expenditures over the next five years to increase by up to 500%. Report says that base station hoteling will coexist with DAS rather than compete with it, and that DAS will be the preferred technology. The report compares DAS versus enterprise-level femto or picocells along with the challenges that each technology faces, including integrating it with Wi-Fi.
Smalls Cells Equal Large Interference?
   Sam Benzacar of Anatech Electronics - RF Cafe
 
By Sam Benzacar

The spectrum between UHF and about 2400 MHz is crammed with services ranging from land mobile to public safety and of course wireless communications and Wi-Fi.

It's a tough place to operate from an interference standpoint and it's likely to get worse, as new allocations and even new services such as IEEE 802.22 operating in the “white spaces” between television channels go “live”. The one inevitable thing that will occur as a result of all this is increased interference, and of course the need for highly-selective filters. One of the contributors to this interference is likely to be the proliferation of small cells.
 
For example, small cells can in some cases actually create the problem they are trying to solve: “dead spots” in coverage. Femtocells can interfere with other cells as well, and as their interference patterns are less predictable (since they're not part of the “carrier-deployed” network). There are a variety of other scenarios in which macrocells, small cells, and femtocells can cause significant interference issues as well.
 
LTE, which is part of 3GPP Release 8, includes inter-cell interference coordination (ICIC) but focuses on mitigating mitigate interference between macrocells. Small cells have become a reality in the short time since LTE was first deployed and 3GPP Release 10 (LTE Advanced) devotes significant attention to heterogeneous networks (cells both large and small) and prescribes ways to dramatically reduce the potential for inter-cell interference. LTE-Advanced won't be deployed for several years, but small cells are here already….thus the problem.
 
Obviously, the best way to mitigate interference is to keep it from occurring, which would be the prescribed method in an ideal world. In reality, interference will always be a challenge, and high-performance RF and microwave filter solutions will remain essential tools for wireless system designers from when they are designed through once they've been deployed.
 
Anatech Electronics has been solving interference problems in wireless systems since the first cellular systems appeared, and we can help you solve yours today. So please give us a call at (973) 772-4242 or send us an email to sales@anatehelectronics.com.
LearnFILTER SOLUTIONS: NO CELL TOO SMALL

Whether your interference problem arises from a macro cell or a pico cell, Anatech Electronics makes filters with the high rejection, low PIM, and other characteristics to keep it in check. 

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[borders/inc-300x250.htm]About Anatech Electronics;
Anatech Electronics, Inc. (AEI) specializes in the design and manufacture of standard and custom RF and microwave filters and other passive components and subsystems employed in commercial, industrial, and aerospace and applications. Products are available from an operating frequency 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 available at www.anatechelectronics.com and standard products are available for purchase at the Anatech Electronics Web store, AMCrf.com.


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Anatech Electronics, Inc.
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Posted  November 14, 2013
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