Decoupling of Multifrequency Dipole Antenna Arrays for Microwave Imaging Applications
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 plana...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2010-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2010/843624 |
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| Summary: | 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 20 dB 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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| ISSN: | 1687-5869 1687-5877 |