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Coupling Reduction Between Dipole Antenna Elements by Using a Planar Meta-Surface

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6 Author(s)
Elena Saenz ; Eur. Space Res. & Technol. Centre (ESTEC), Eur. Space Agency, Noordwijk ; IÑigo Ederra ; RamÓn Gonzalo ; Sergey Pivnenko
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The mutual coupling between dipole antenna array elements using a planar meta-surface as superstrate is experimentally investigated. The meta-surface is based on grids of short metal strips and continuous wires. A comparison between the mutual coupling when the dipoles are radiating in free space and in presence of the superstrate is presented. On average, between 3 to 14 dB reduction of the mutual coupling is achieved when the superstrate is used. The effect of the mutual coupling on the radiation performance of the array is studied by spherical near-field measurements of the radiation pattern when one driven dipole is fed and the others are matched with 50 Omega loads. The back-projected field on the aperture and on the E-plane is shown.

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IEEE Transactions on Antennas and Propagation  (Volume:57 ,  Issue: 2 )