Decoupling of multifrequency dipole antenna arrays for microwave imaging applications
International Journal of Antennas and Propagation
Hindawi Publishing Corporation
1 - 8
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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.
Far field measurement
Planar near-field scanning
Directional patterns (antenna)
Published Version (Please cite this version)http://dx.doi.org/10.1155/2010/843624
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