A Metasurface Wall for Isolation Enhancement: Minimizing mutual coupling between MIMO antenna elements

Yin, Bo; Feng, Xi‐Qiao; Gu, Jing

doi:10.1109/map.2019.2943299

Cited by 27 publications

(8 citation statements)

References 12 publications

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“…The previous decoupling structures can be roughly divided into four categories. The first is the metamaterial structures, such as inserting a metasurface shield [5]- [6], a polarization rotator wall [7], a 3D meta-structure resonator [8] or a metasurface wall [9] between antenna elements. However, those metamaterial structures are made up of periodical metallic cells, leading to a large size, which may not be suitable for M-MIMO antennas.…”

Section: Introductionmentioning

confidence: 99%

Embeddable Structure for Reducing Mutual Coupling in Massive MIMO Antennas

Qin

Cui

2020

IEEE Access

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An embeddable decoupling structure is proposed for massive multiple-input-multiple-output (M-MIMO) antennas in this paper. The embeddable decoupling structure is made up of an end-folded metal strip and a pair of C-shaped metal strips. By introducing the embeddable decoupling structure near two closely spaced dipole antennas, additional coupling can be generated to counterbalance the original mutual coupling between the dipole antennas. The decoupling structure is firstly designed for a 1×2 MIMO antenna, which can provide a reduction of about 5 dB for the mutual coupling. Then, an evolutional decoupling structure is designed, which is composed of a pair of inverted U-shaped metal strips and two parallel reversed C-shaped metal strips. The evolutional decoupling structure is employed in a 3×3 MIMO antenna operating in 5G bands to demonstrate its capability of decoupling. An average reduction of about 10 dB on mutual coupling is obtained over 3.3-4.5 GHz (30.8%). Moreover, it is found that the deteriorated radiation patterns due to the mutual coupling are improved. The decoupling structure can be totally embedded in a M-MIMO antenna, which has no increase in the antenna volume. The proposed decoupling structure exhibits advantages of radiation pattern distortion alleviation, wideband, embeddable, and dual-polarized capabilities for M-MIMO applications.

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Section: Introductionmentioning

confidence: 99%

Embeddable Structure for Reducing Mutual Coupling in Massive MIMO Antennas

Qin

Cui

2020

IEEE Access

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“…To achieve in-band decoupling (IBD), it is intuitive to insert a band-stop FSS wall between antennas, 16,17 or arrange a single-negative metasurface above antennas. [18][19][20][21] Besides, over-the-air coupling can be canceled out by loading antenna decoupling surface (ADS), 22,23 dielectric superstrate [24][25][26][27][28] or parasitic structures, 29 since they introduce an additional coupling path with equal magnitude and opposite phase.…”

Section: Introductionmentioning

confidence: 99%

Dual‐band stacked base station antenna array with high isolation

Chu

2022

Int J RF Mic Comp-Aid Eng

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A high‐isolation dual‐band base station antenna array is proposed. At first, a 5‐element high‐band (HB) dipole antenna array with inter‐element distance of 0.4 λH0 (the free‐space wavelength at the center frequency of the HB) is decoupled. With the main antenna decoupling surface (ADS), metal baffles and auxiliary ADS, the E‐plane and H‐plane couplings can be reduced to <−23.1 dB (<−11.4 dB without decoupling) and <−22.6 dB (<−14.8 dB without decoupling), respectively. The dual‐layer ADS design successfully resolves the contradiction between decoupling performance and matching. The ground plane of the 5‐element array is then exploited as the low‐band patch radiator, forming the proposed dual‐band antenna array. Measured results show that satisfactory cross‐band isolation (>33.1 dB), in‐band isolation (>22.2 dB) and polarization isolation (>30 dB) are obtained. Stable unidirectional radiation patterns are also acquired.

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“…Besides the techniques, mentioned in Table 1, we can observe that Frequency Selective Surface (FSS) (Huang, 2020) and Metasurface (F. Liu et al., 2020; Z. Wang et al., 2020; Yin et al., 2020) are also sometimes useful in suppressing MC along with their many others advantages.…”

Section: Introductionmentioning

confidence: 99%