Collocated Microstrip Antennas for MIMO Systems with a Low Mutual Coupling Using Mode Confinement

Julien Sarrazin (1) , Yann Mahé (2) , Stéphane Avrillon (2) , Serge Toutain (2)

1 BK Birla Institute of Technology
2 IETR - Institut d'Électronique et des Technologies du numéRique

In this paper, collocated antennas for MIMO systems are presented. The structure is composed of a dual-polarized microstrip square patch combined to a dual-polarized microstrip square ring. Consequently, four different radiation patterns are available simultaneously. With a length of about one guided wavelength, the proposed structure is well suited to reduce the MIMO terminal size. The structure operates in the 5.25 GHz band and exhibits a mutual coupling between the four input ports less than -23.5 dB in simulation and -20 dB in measurement. MIMO channel capacity measurements have been performed and demonstrate that the proposed antenna system can replace a classical system based on space diversity.

Mots clés: collocated antennas; radiation pattern diversity; MIMO system; channel capacity measurements

Domaines: Autre [cs.OH]

Julien Sarrazin, Yann Mahé, Stéphane Avrillon, Serge Toutain. Collocated Microstrip Antennas for MIMO Systems with a Low Mutual Coupling Using Mode Confinement. IEEE Transactions on Antennas and Propagation, 2010, 58 (2), pp.589-592. ⟨10.1109/TAP.2009.2037690⟩. ⟨hal-00506732⟩