A Descriptive Model for Analyzing the Diversity Performance of Compact Antenna Arrays

Mutual coupling has negative impact on the radiation properties of compact antenna arrays when the spacing of individual radiators is considerably closer than half a wavelength. We have previously put forward a description of the radiation efficiency of an arbitrary antenna array in terms of orthogo...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2009-02, Vol.57 (2), p.395-405
Main Authors: Volmer, C., Weber, J., Stephan, R., Hein, M.A.
Format: Article
Language:English
Subjects:
Antenna array mutual coupling
Antenna arrays
antenna diversity
Antennas
Applied sciences
Closed-form solution
Coupling circuits
Equivalent circuits
Exact sciences and technology
Exact solutions
Mathematical analysis
Mathematical models
Mobile communication
Mutual coupling
Performance analysis
Radiators
Radiocommunications
Rayleigh channels
Rayleigh scattering
Scattering parameters
Telecommunications
Telecommunications and information theory
Wavelengths
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Description
Summary:Mutual coupling has negative impact on the radiation properties of compact antenna arrays when the spacing of individual radiators is considerably closer than half a wavelength. We have previously put forward a description of the radiation efficiency of an arbitrary antenna array in terms of orthogonal radiating eigenmodes. The present publication elaborates on this concept and presents a descriptive equivalent circuit model for a coupled antenna array. We show that eigenmodes undergo independent Rayleigh fading under appropriate conditions. Also, we demonstrate how practical closed-form expressions in terms of the array's scattering matrix can be derived, which characterize the diversity performance and therefore are convenient measures for the radiation quality of a compact antenna array.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2008.2011244