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Low Mutual Coupling Between Monopole Antennas by Using Two \lambda /2 Slots

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2 Author(s)
Sonkki, M. ; Centre for Wireless Commun., Univ. of Oulu, Oulu, Finland ; Salonen, E.

A simple structure for achieving low mutual coupling between two monopole antennas at 2.45 GHz center frequency is studied. The structure has two half-wavelength slots cut into the ground plane between the monopoles. The lowest mutual coupling is between -54 and -35 dB, depending on the studied structure. In comparison, mutual coupling using the reference ground planes is between -15 and 7 dB. The improvement in measured total efficiencies with the slotted ground plane against the reference ground planes is between 2.8 and 24.3%.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:9 )