Isolation Improvement of the MIMO PIFA using Metamaterial Absorber Array

Kaur, Manpreet; Singh, Hari Shankar

doi:10.1109/apsym50265.2020.9350737

Cited by 2 publications

(1 citation statement)

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“…Currently, there are two ways to isolate MIMO unit antennas. One method uses planar isolation to reduce the coupling of surface currents and thus reduce the coupling between antennas [ 22 , 23 ]. The other method uses a three-dimensional absorption wall, which mainly isolates the radiation coupling of the antenna [ 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Mutual Coupling Reduction of a Multiple-Input Multiple-Output Antenna Using an Absorber Wall and a Combline Filter for V2X Communication

Shen

Dou

2023

Sensors

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This paper presents an MIMO antenna for vehicle-to-everything (V2X) communication, which adopts two ways of combline filters and absorption wall decoupling. A combline filter and an absorption wall are used, respectively, for internal and external decoupling. The combline filter is incorporated between the ground of the two adjacent antennas, which reduces the mutual coupling between them. Additionally, the mutual coupling of radiation between adjacent antennas is significantly reduced by the absorber wall. These combline filters and absorber walls use the method of electromagnetic field distribution to explain the reduction in the mutual coupling between the adjacent antennas. The transmission coefficient and surface current distribution explain the effectiveness of the decoupling structure. When the frequency is between 3.8 and 4.8 GHz, the simulation and measurement results show that S11 is less than −10 dB, the bandwidth is 25% and the peak gain is 7.8 dBi. In addition, the proposed MIMO antenna has a high isolation between antenna units (>37 dB), and the envelop correlation coefficient (ECC) is less than 0.005.

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