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Redistributing signals indoors eliminates dead spots
By Steve Alexander
Star Tribune (Minneapolis)
Published on Monday, Apr 28, 2008
When the cellular phone revolution took corporate America by storm, there was a problem: Lots of cell phones don't work well, or at all, inside large office buildings.
The underlying problem is that cellular radio signals don't penetrate building walls very well. Now there are new solutions: Cell phone signals are being redistributed around the inside of corporate buildings with special antennas that eliminate dead spots. The technology also can help cell phone customers who can't get a signal inside their homes, and is useful for outdoor business campuses where tall buildings block reception.
''There are holes in the cellular network, and we fill those holes for homes and enterprises,'' said Hilton Nicholson, president of network solutions at ADC Telecommunications Inc. of Eden Prairie, Minn., a longtime seller of network gear to telephone and cable TV companies.
ADC hopes to sell cellular phone companies receiving and sending units that fit in the basement of a corporate building. It acts as a go-between for regular cellular towers outside the building and many small in-building antennas, thus banishing cell phone dead spots. For business campuses that have poor reception, ADC can put a small antenna in the middle of a quadrangle that relays conversations back to the large unit in the basement. A similar product is being tested for the home market.
While redistributing cellular signals in big buildings can be pricey, ranging from $100,000 to $4 million, cell phone companies could install a simpler unit in a house for about $200, Nicholson said.
When the cellular phone revolution took corporate America by storm, there was a problem: Lots of cell phones don't work well, or at all, inside large office buildings.
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