A high‐selectivity dual‐polarization filtering antenna with metamaterial for 5G application

• Published in: Microwave and optical technology letters Vol. 61; no. 1; pp. 63 - 67
• Main Authors: Ma, Shaobo, Zhai, Huiqing, Wei, Zichun, Zhou, Xiangyu, Zheng, Licheng, Li, Jiaxu
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 01-01-2019; Wiley Subscription Services, Inc
• Subjects: Antennas; Bandwidths; Communications systems; dual polarization; filtering antenna; Filtration; high selectivity; metamaterial; Metamaterials; Multilayers; out‐of‐band rejection; Polarization; Rejection; Selectivity; Wireless communications
• ISSN: 0895-2477; 1098-2760
• DOI: 10.1002/mop.31525

A high‐selectivity dual‐polarization filtering antenna with metamaterial is presented in this letter. The multilayer coupled radiation structure of the antenna determines a filtering function. With the metamaterial layer designed above the antenna, a sharp roll‐off rate at high pass band edge and a better out‐of‐band rejection occurs, thus a better high selective filtering characteristic can be achieved. Simulating and measuring the antenna, the impedance bandwidth (VSWR <2) of the antenna is from 3.25 GHz to 3.85 GHz; meanwhile, the maximum gain can reach 9dBi. The gain of antenna can quickly decrease 43dBi at the high pass band edge from 3.85 GHz to 4.05 GHz and the antenna has an out‐of‐band rejection level of 27dBi from 4.05 GHz to 5 GHz. The tested results verify our designs and the antenna could be a good candidate for the 5G anti‐interference wireless terminal communication system.