Vol. 26

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2011-08-16

Eigenmode Decoupling for MIMO Loop-Antenna Based on 180° Coupler

By Shaoli Zuo, Ying-Zeng Yin, Zhi-Ya Zhang, Wei-Jun Wu, and Jiao-Jiao Xie
Progress In Electromagnetics Research Letters, Vol. 26, 11-20, 2011
doi:10.2528/PIERL11071109

Abstract

A low-cost, high isolation, printed loop-antenna system for multiple-input multiple-output (MIMO) applications in the 2.4 GHz WLAN band is presented. By feeding the orthogonal eigenmodes of the array, port decoupling (S21< -20 dB) with tightly coupled elements (only 0.07λ separation) is obtained. The orthogonal eigenmodes are realized based on 180° coupler. Then decoupled external ports of the feed network may be matched independently by using conventional matching circuits. With this low-cost and high isolation characteristic, it is very suitable for being embedded inside a wireless access point (AP).

Citation


Shaoli Zuo, Ying-Zeng Yin, Zhi-Ya Zhang, Wei-Jun Wu, and Jiao-Jiao Xie, "Eigenmode Decoupling for MIMO Loop-Antenna Based on 180° Coupler," Progress In Electromagnetics Research Letters, Vol. 26, 11-20, 2011.
doi:10.2528/PIERL11071109
http://jpier.org/PIERL/pier.php?paper=11071109

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