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A monopole antenna with butterfly‐like coupling slot for multiple input multiple output applications
Author(s) -
Zhou JianHua,
He XianHui,
Nie Jing,
You BaiQiang,
Li WeiWen,
Zhang KaiShuang
Publication year - 2019
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31902
Subject(s) - monopole antenna , antenna (radio) , coupling (piping) , physics , mimo , acoustics , electronic engineering , electrical engineering , computer science , telecommunications , engineering , beamforming , mechanical engineering
The work presented in this article is focused on the design of an omni‐directional and dual‐frequency antenna for multiple input multiple output (MIMO) applications. The proposed antenna consists of a monopole with a pair of L‐shaped strips and a butterfly‐like coupling slot, excited by a coplanar waveguide and a proximity coupling, respectively. Using two completely different elements and exciting multimode orthogonal characteristics current, high isolation for two ports is achieved. To improve the stability of input impedance, a gradient arc structure between the microstrip line and monopole element is adopted. The designed MIMO antenna provides port isolation of better than −20 dB and envelope correlation of lower than 0.02, at two resonant frequencies covering WLAN/WiMAX bands.