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National Cellular Carrier Maps
Cellular Coverage in U-M Ann Arbor Campus Buildings
College of Engineering Pilot
Campus Cellular Telephone Access Project Executive Summary
Antenna Technology
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Antenna TechnologyThe antenna technology being tested in the College of Engineering (CoE) pilot, is a 3rd generation Distributed Antenna System (DAS). As defined by PCIA—the Wireless Infrastructure Association, and its DAS Forum, DAS is a network of spatially separated antenna nodes connected to a common source via a transport medium that provides wireless service within a geographic area or structure. The 3rd generation DAS technology is significantly less expensive to install. Both the 1st (Leaky Coax) and 2nd (traditional DAS) generations require significant infrastructure, raceway and cables, be installed throughout the building. The 3rd generation technology uses the building's existing heating or cooling ductwork. A single antenna can cover 20,000 to 30,000 square feet. Additional antennas are connected with in-building fiber riser cable. For more technical information about the HVAC duct antennas see: Experimental Mode Content Analysis Technique for
Complex Overmoded Waveguide Systems
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