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Home | Seminars and Symposia | Past seminars/symposia: Tuesday, January 18, 2011

DTC Leading Edge Seminar Series

Distributed Antenna Systems: An Open Architecture for All Wireless Systems


Larry Fischer
Director, Research and System Architecture
Network Solutions Wireless Business Unit
ADC Telecommunications (now a part of Tyco Electronics)

Tuesday, January 18, 2011
3:30 p.m. reception
4:00 p.m. seminar

401/402 Walter Library


Distributed Antenna Systems (DAS) have been around for over 20 years as an RF distribution method of last resort. However, the advent of more complex modulation schemes coupled with the need to mix modulation modes in the same frequency bands and the requirements for better signal quality have pushed the wireless operators to look for alternate antenna systems. In the past two years, the major wireless carriers, especially in the United States, have begun using DAS as their primary antenna networks in high density areas and large indoor venues. This lecture will cover the history of DAS, the various technologies used to build DAS networks, the mechanics of deploying these networks and the business reasons why wireless operators are selecting this RF distribution method.


During his more than 15-year tenure with ADC/TE, Larry Fischer has held a variety of research and product management positions, including Chief RF Engineer, Director of RF Development, Director of Product Management for Filter and Amplification Products and Director of Research. In his current position with the Network Solutions Wireless Business Unit, he is responsible for research initiatives for ADC/TE’s wireless products. During his more than 35 years of industry experience, Fischer has managed his own RF research company, Waseca Technology, where he carried out the initial development of the digital RF transport utilized in today’s Digital Distributed Antenna products and Tower Amplifier product portfolio. He also has held development and management positions with the EF Johnson Company, where he headed the initial development of their cellular radio program, and Automatic Electric-Lenkurt Microwave-GTE Labs. Fischer holds a B.S. degree in Mechanical Engineering from Iowa State University, Ames, and a M.S. degree in Applied Math from the Illinois Institute of Technology, Chicago. He is the holder of 21 issued patents in cellular radio and data transmission.