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Mutual scattering mode for LTE MIMO antennas and its application to correlation reduction

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3 Author(s)
Shuai Zhang ; Sch. of Electr. Eng., KTH-R. Inst. of Technol., Stockholm, Sweden ; Zhinong Ying ; Sailing He

A - mutual scattering mode -is introduced in this paper as a novel method to reduce the correlation for the LTE MIMO antenna arrays. This mode is mainly based on the increase of the Q factor for the closely-positioned MIMO antenna elements. With the increased Q factor, each element becomes a scatter for the other elements. Consequently, without adding any structure in the MIMO system, the radiation patterns will be separated to achieve a low correlation (even close to zero) in LTE 700 MHz bands. In practice, this high Q factor is realized through better impedance matching, which makes this mode quite easy to excite. When the effective MIMO element distance is larger than a certain value, better matching (higher Q factor) can not only reduce the correlation but also improve the efficiency (even though the mutual coupling becomes stronger).

Published in:

Antennas and Propagation (APCAP), 2012 IEEE Asia-Pacific Conference on

Date of Conference:

27-29 Aug. 2012