.png){kind=icon}
.png){kind=icon}
Return
A novel decoupling method for compact MIMO antenna array
.png){kind=icon}
PRE
AI
DOI：10.1016/j.aeue.2026.156334.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
High mutual coupling is a core challenge for compact multiple-input multiple-output (MIMO) antenna design, especially when antenna arrays serve as the radiating elements. This paper proposes a hybrid decoupling method that combines defected ground structures (DGS) and localized dielectric blocks to simultaneously suppress multiple coupling paths. The DGS is mainly used to suppress ground current propagation, while the dielectric blocks further reduce space wave and surface wave coupling. Specifically, we design and fabricate a four-port MIMO antenna that operates at 17.63 GHz, with overall dimensions of 2.070 & times; 2.370 & times; 0.3570, where 70 is the free-space wavelength at 17.63 GHz. Each radiating element is implemented as a 1 & times; 3 linear series-fed patch array. Simulation results show an operating bandwidth from 17.48 GHz to 17.78 GHz. Despite an extremely small edge-to-edge spacing of only 0.05870 between adjacent elements, the isolation between adjacent ports is significantly improved from 8.8 to 25 dB and from 7.9 to 22.9 dB. Consequently, the isolation between any two ports exceeds 22.9 dB within the operating bandwidth, with peak gains of 12.36 dBi and 11.23 dBi achieved for the edge and center elements, respectively, at the resonant frequency. Measurements of the fabricated prototype confirm the effectiveness of the design, demonstrating an isolation greater than 19 dB and radiation patterns in excellent agreement with simulations. The proposed design achieves effective isolation enhancement and excellent radiation performance within a compact footprint, making it suitable for satellite communication systems and high-throughput wireless backhaul. This work provides an effective solution to mitigate the high mutual coupling issue in compact MIMO systems for practical Ku-band high-capacity communication applications.
Keywords:
Multi-input multi-output (MIMO) antenna
Mutual coupling reduction
Ku-band
Defected ground structure (DGS)
Dielectric block
Patch array
Journal
A
IF:
3.2
Papers:
5.5K
Citations:
8.3K