Decoupling of multifrequency dipole antenna arrays for microwave imaging applications

Date
2010
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Source Title
International Journal of Antennas and Propagation
Print ISSN
1687-5869
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Publisher
Hindawi Publishing Corporation
Volume
2010
Issue
Pages
1 - 8
Language
English
Type
Article
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Abstract

The mutual coupling between elements of a multifrequency dipole antenna array is experimentally investigated by S -parameter measurements and planar near-field scanning of the radiated field. A multifrequency array with six dipoles is analyzed. In order to reduce the coupling between dipoles, a planar metasurface is placed atop the array acting as superstrate. The mutual coupling of the antenna elements in the absence and presence of the superstrate is presented comparatively. Between 3 and 20dB mutual coupling reduction is achieved when the superstrate is used. By scanning the field radiated by the antennas and far-field measurements of the radiation pattern, it is observed that the superstrate confines the radiated power, increases the boresight radiation, and reduces the endfire radiation.

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Keywords
Antenna element, Boresight, End-fire, Far field measurement, Microwave imaging, Multi frequency, Multifrequency arrays, Mutual coupling, Planar near-field scanning, Radiated Field, Radiated power, Radiation patterns, S-Parameter measurements, Superstrates, Antenna arrays, Directional patterns (antenna), Fuzzy control, Scattering parameters, Dipole antennas
Citation
Published Version (Please cite this version)