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Articles

Development of an Adaptive and a Switched Beam Smart Antenna System for Wireless Communications

Pages 399-408 | Published online: 03 Apr 2012
 

Abstract

This study concentrates on the development of two separate Smart Antenna Systems for the 2.45 GHz ISM band. Both systems incorporate the RF-beamforming method. Each system has the ability to point the beam in a three dimensional space, both in azimuth and in elevation direction. The Switched Beam System adopts a passive network-based beamforming approach, using 2-D Butler matrix topologies. The Adaptive System utilizes the vector modulator method, but only in the azimuth direction, increasing beam-steering accuracy, whereas introducing complexity and cost. The system design is presented for both cases, along with some module design and testing examples. A comparison of the two systems will be also discussed.

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