A switched dual antenna array for mobile computing networks

The 2.4GHz licence-free ISM band is used extensively for hosting high performance mobile computing networks. The demand for wireless mobile computing networks with high aggregate throughput and channel quality is countered by the high levels of multipath noise in indoor environments. Although the us...

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Bibliographic Details
Published in:International journal of electronics 2002-04, Vol.89 (4), p.325-335
Main Authors: Kalis, Antonis, Antonakopoulos, Theodore, Soras, Constantine, Makios, Vassilios
Format: Article
Language:English
Subjects:
Antennas
Applied sciences
Exact sciences and technology
Radiocommunications
Telecommunications
Telecommunications and information theory
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Summary:The 2.4GHz licence-free ISM band is used extensively for hosting high performance mobile computing networks. The demand for wireless mobile computing networks with high aggregate throughput and channel quality is countered by the high levels of multipath noise in indoor environments. Although the use of directive antennas has shown good results in overcoming the multipath effect, antennas with large directivity cannot be used in a mobile computing network without affecting the functionality of the wireless protocol used. This paper presents a solution to this problem, introducing a dual antenna diversity scheme for the 2.4GHz ISM band and its beam selector circuit for controlling the diversity scheme. The proposed antenna produces an omnidirectional pattern and two directional patterns with very large nulls in their azimuth pattern, while its low complexity and low cost allows easy integration into consumer products.
ISSN:0020-7217
1362-3060
DOI:10.1080/00207210210126989