The Opportunities and Challenges of LTE Unlicensed in 5 GHz
David Witkowski, Executive Director, Wireless Communications Initiative
In 1998, the Federal Communications Commission established the Unlicensed National Information Infrastructure or U-NII 5 GHz bands. These are used primarily for Wi-Fi networks in homes, offices, hotels, airports, and other public spaces and also consumer devices. U-NII is also used by wireless Internet Service Providers, linking public safety radio sites, and for monitoring and critical infrastructure such as gas/oil pipelines.

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Band Reject Filter Series
Higher frequency band reject (notch) filters are designed to operate over the frequency range of .01 to 28 GHz. These filters are characterized by having the reverse properties of band pass filters and are offered in multiple topologies. Available in compact sizes.
RLC Electronics

SP6T RF Switch
JSW6-33DR+ is a medium power reflective SP6T RF switch, with reflective short on output ports in the off condition. Made using Silicon-on-Insulator process, it has very high IP3, a built-in CMOS driver and negative voltage generator.

Group Delay Equalized Bandpass Filter
Part number 2903 is a group delayed equalized elliptic type bandpass filter that has a typical 1 dB bandwidth of 94 MHz and a typical 60 dB bandwidth of 171 MHz. Insertion loss is <2 dB and group delay variation from 110 to 170 MHz is <3nsec.
KR Electronics

Absorptive Low Pass Filter
Model AF9350 is a UHF, low pass filter that covers the 10 to 500 MHz band and has an average power rating of 400W CW. It incurs a rejection of 45 dB minimum at the 750 to 3000 MHz band, and power rating of 25W CW from 501 to 5000 MHz.

LTE Band 14 Ceramic Duplexer
This high performance LTE ceramic duplexer was designed and built for use in public safety communication and commercial cellular applications. It operates in Band 14 and offers low insertion loss and high isolation to enable clear communications in the LTE network.
Networks International

See all products in this issue

December 2012

Duncan Smith
President, Norden Millimeter, Inc.

Q: The importance of sustaining and developing technology has reached a point where states and cities are more actively building relationships with universities and recruiting high-tech companies. However, there continues to be a shortage of engineering graduates, especially those focusing on RF and microwave technology. What would your company do (or is doing) to help promote careers?

A: I think there are several paths to help bolster the number of microwave engineers. Personally I believe the earlier a potential candidate can be influenced the better. This could be through high school and/or college intern programs to educate the students about RF and microwave technology. The other viable approach that comes to mind is to “grow your own.” Take an electrical engineer with a general background and through work teach them the craft of microwave engineering. Really, isn’t this the way most of us old timers learned anyway. School gives you some tools and fundamentals, but the useful in depth knowledge really only comes from on the job training. Currently Norden is growing an RF engineer into a microwave engineer.

Q: For those of you serving the military market, what do you expect 2013 will bring in terms of opportunities in this sector?

A: Unfortunately it’s very hard to tell what 2013 will be like. With the outcome of the recent election it’s not clear if the Republicans and Democrats will actually work together to avoid the $100 billion in forced defense budget cuts at the start of 2013 that are a result of the compromise to raise the federal debt ceiling in 2011. The forced budget cuts would most certainly put a damper on all military acquisitions. If that calamity is avoided there should be opportunities in the signal intelligence arena and also the UAV market.

Q: If your company serves the commercial markets, are you encouraged by any particular emerging application or technology?

A: There is a very exciting emerging application for sensors to detect foreign object debris (FOD) on runways. FOD on runways causes billions of dollars in damage to aircraft yearly. Norden has developed a low cost MMW transceiver designed to be used as part of the FOD detection system.

Q: Last year, we asked what impact the global economic crisis was having on the markets you serve and on how you run your business. What is your current perspective?

A: So far so good. We haven’t seen an obvious impact from the global economic crisis. Our business in Japan is down, our business with the UK is up, our business in general is up. However the future is less certain. A combination of factors have the possibility of creating the “Perfect Storm” from and economic basis. The debt crisis in Europe, possible tax increases and spending cuts in the US, and a bottoming of China’s economy could conspire together to significantly slow the global economy for several years.

Q: What countries or regions do you believe will provide the greatest growth potential for the wireless industry in 2013?

A: I think the strongest growth for the high volume commercial wireless industry will be in China, India, and Latin America. ♦


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Uncertain Times for DefenseOpen’s Systems and Changes in DoD Procurement: This Time It’s Real
By Barry Manz

The U.S. Department of Defense has a well-earned reputation for inertia. Many proposals for change are made – but nothing happens. The COTS initiative, which promised cost savings through the use of off-the-shelf commercial parts, sounded terrific at the time. It heralded a major departure from standard DoD procurement that more or less guaranteed that every system would be different in part because it used parts that were developed from scratch, leading to “one-off” systems that were very expensive. Read More...

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