Decoupling technique of patch antenna arrays with shared substrate by suppressing near-field magnetic coupling using magnetic metamaterials

doi:10.1088/1674-1056/26/4/047301

Abstract In this paper, we propose the decoupling technique of patch antenna array by suppressing near-field magnetic coupling (NFMC) using magnetic metamaterials. To this end, a highly-integrated magnetic metamaterials, the substrate-integrated split-ring resonator (SI-SRR), is firstly proposed to achieve negative permeability at the antenna operating frequency. By integrating SI-SRR in between two closely spaced antennas, magnetic fields are blocked in the shared substrate due to negative permeability of SI-SRR, reducing NFMC between the two antennas. To verify the technique, a prototype was fabricated and measured. The measured results demonstrated that the isolation can be enhanced by more than 17 dB even when the gap between the two patch antennas is only about 0.067λ. Due to high integration, this technique provides an effective alternative to high-isolation antenna array.

Keywords: antenna isolation antenna array near-field magnetic coupling magnetic metamaterials negative permeability

Received: 07 May 2016
Revised: 13 January 2017
Accepted manuscript online:

PACS:	73.20.Mf	(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
	41.20.Jb	(Electromagnetic wave propagation; radiowave propagation)
	78.20.Bh	(Theory, models, and numerical simulation)
	84.40.Ba	(Antennas: theory, components and accessories)

Fund: Project supported in part by the National Natural Science Foundation of China (Grant Nos. 61331005, 61471388, 61501503, 61501502, 61501497, 51575524, 61302023, and 11304393) and the Natural Science Foundation of Shaanxi Province, China (Grant Nos. 2015JM6300 and 2015JM6277).

Corresponding Authors: Jiafu Wang, Shaobo Qu
E-mail: wangjiafu1981@126.com;qushaobo@mail.xjtu.edu.cn

Cite this article:

Zhaotang Liu(柳兆堂), Jiafu Wang(王甲富), Shaobo Qu(屈绍波), Jieqiu Zhang(张介秋), Hua Ma(马华), Zhuo Xu(徐卓), Anxue Zhang(张安学) Decoupling technique of patch antenna arrays with shared substrate by suppressing near-field magnetic coupling using magnetic metamaterials 2017 Chin. Phys. B 26 047301

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Decoupling technique of patch antenna arrays with shared substrate by suppressing near-field magnetic coupling using magnetic metamaterials

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