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Decoupling antenna elements of PIFA arrays on handheld devices

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3 Author(s)
Kokkinos, T. ; Dept. of Electron. & Electr. Eng., Loughborough Univ., Loughborough ; Liakou, E. ; Feresidis, A.P.

A novel approach for reducing the electromagnetic coupling between planar inverted-F antennas (PIFAs), built on a common ground plane and forming antenna arrays on handheld devices, is presented. The proposed technique is based on the insertion of two coupled quarter-wavelength slits on the ground plane between the antennas. By optimising the distance between the coupled slits, a magnetic resonance can be established within the operating bandwidth of the PIFAs. This resonance inserts a transmission zero in the coupling path between the closely spaced PIFAs, enabling the reduction of the coupling between them to very low levels without significantly disturbing their operating bandwidth.

Published in:

Electronics Letters  (Volume:44 ,  Issue: 25 )