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A Spiral-Dipole Antenna for MIMO Systems

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4 Author(s)
Yun-Taek Im ; Sch. of Eng., Inf. & Commun. Univ., Daejeon ; Jee-Hoon Lee ; Bhatti, R.A. ; Seong-Ook Park

A new circular polarization spiral-dipole antenna has been proposed for multilple-input-multiple-output (MIMO) systems. A dipole antenna is loaded with spirals at both of its ends to generate omnidirectional left-hand or right-hand circular polarization. The sense of polarization [left-hand circular polarization (LHCP) or right-hand circular polarization (RHCP)] depends on the orientation of the spirals. The measured bandwidth of the antenna is 8% at the center frequency of 5.2 GHz with 3.6-dBic gain. The isolation ( S 21) between collocated LHCP and RHCP antennas is better than 30 dB that makes them suitable for MIMO.

Published in:

Antennas and Wireless Propagation Letters, IEEE  (Volume:7 )