A Graphene-Based Stopband FSS with Suppressed Mutual Coupling in Dielectric Resonator Antennas

Materials

Wei Xia¹  Xin Zhao¹  Rongguo Song¹  Wei Qian¹  Daping He¹  Wenqing Zhou² 

[1] Hubei Engineering Research Center of RF-Microwave Technology and Application, Wuhan University of Technology, Wuhan 430070, China;School of Electronic Science and Engineering, Hunan University of Information Technology, Changsha 410138, China;

关键词: mutual coupling reduction;    dielectric resonator antenna array;    frequency-selective surface;    high-conductivity graphene films;   

DOI  :  10.3390/ma14061490

来源: DOAJ

【 摘 要 】

A novel stopband frequency-selective surface (FSS) made of high-conductivity graphene assemble films (HCGFs) for reducing the mutual coupling between dielectric resonator antennas (DRAs) is investigated and presented. The FSS is a “Hamburg” structure consisting of a two-layer HCGF and a one-layer dielectric substrate. A laser-engraving technology is applied to fabricate the FSS. The proposed improved Jerusalem cross FSS, compared with cross FSS and Jerusalem cross FSS, can effectively reduce the size of the unit cell by 88.89%. Moreover, the FSS, composing of 2 × 10-unit cells along the E-plane, is proposed and embedded between two DRAs, which nearly has no effect on the reflection coefficient of the antenna. However, the mutual coupling is reduced by more than 7 dB on average (7.16 dB at 3.4 GHz, 7.42 dB at 3.5 GHz, 7.71 dB at 3.6 GHz) with the FSS. The patterns of the antenna are also measured. Therefore, it is suggested that the proposed FSS is a good candidate to reduce mutual coupling in the multiple-input–multiple-output (MIMO) antenna system for 5G communication.

【 授权许可】

Unknown