Mutual Coupling Reduction of a Closely Spaced Four-Element MIMO Antenna System Using Discrete Mushrooms

AbstractA printed multiband Multi-Input Multiple-Output (MIMO) antenna is proposed in this paper. This MIMO antenna system comprises two symmetric printed monopole antennas. Each antenna element consists of multiple bend lines, producing four resonant modes and covering the GSM900, PCS, LTE2300, and 5G bands. Simulated and measured results prove that the proposed MIMO antenna can be applied to traditional 2G, 3G, 4G, and present 5G mobile communication. By etching four inverted L-shaped grooves on its ground plate, mutual coupling between the adjacent antenna elements has been suppressed. This makes the |S21| at all four resonant modes is lower than −40 dB. In addition, its low coupling mechanism has been analyzed by surface current distribution. The designed multiband MIMO antenna provides an idea of reference to realize low mutual coupling between antenna elements, which is also realizable in infrared or optical regimes with appropriate designs.

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Mutual Coupling Reduction for MIMO LTE Antenna System with a Neutralization Line in Shark-fin Environment

10.1109/icmmt52847.2021.9617830 ◽

2021 ◽

Author(s):

Chen Chen ◽

Qinshu Chen ◽

Hongli Peng ◽

Junfa Mao

Keyword(s):

Mutual Coupling ◽

Antenna System ◽

Neutralization Line ◽

Mutual Coupling Reduction

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Capacity of a 2/spl times/2 MIMO antenna system with mutual coupling losses

IEEE Antennas and Propagation Society Symposium, 2004. ◽

10.1109/aps.2004.1330528 ◽

2004 ◽

Cited By ~ 8

Author(s):

B. Lindmark

Keyword(s):

Mutual Coupling ◽

Antenna System ◽

Mimo Antenna

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Mutual Coupling Reduction of DRA for MIMO Applications

Advanced Electromagnetics ◽

10.7716/aem.v8i1.730 ◽

2019 ◽

Vol 8 (1) ◽

pp. 75-81

Author(s):

N. Al Shalaby ◽

S. G. El-Sherbiny

Keyword(s):

Mutual Coupling ◽

Dielectric Material ◽

Ground Plane ◽

Multiple Input Multiple Output ◽

Antenna System ◽

Parasitic Element ◽

Mimo Antenna ◽

Multiple Input ◽

Input Multiple Output ◽

Element Method

In this paper, A multiple input Multiple Output (MIMO) antenna using two Square Dielectric Resonators (SDRs) is introduced. The mutual coupling between the two SDRAs is reduced using two different methods; the first method is based on splitting a spiral slot in the ground plane, then filling the slot with dielectric material, "E.=2.2". The second method is based on inserting a copper parasitic element, having the same shape of the splitted Spiral, between the two SDRAs. The effect of replacing the copper parasitic element with Carbon nanotubes (CNTs) parasitic element "SOC12 doped long-MWCNT BP" is also studied. The antenna system is designed to operate at 6 GHz. The analysis and simulations are carried out using finite element method (FEM). The defected ground plane method gives a maximum isolation of l8dB at element spacing of 30mm (0.6λo), whereas the parasitic element method gives a maximum isolation of 42.5dB at the same element spacing.

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