Open AccessWideband tri‐port MIMO antenna with compact size and directional radiation pattern
Author(s) -
Wang Han,
Liu Longsheng,
Zhang Zhijun,
Feng Zhenghe
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2014.2291
Subject(s) - mimo , wimax , electronic engineering , wideband , radiation pattern , dipole antenna , antenna diversity , antenna (radio) , electrical engineering , computer science , telecommunications , wireless , engineering , beamforming
A wideband tri‐port multiple‐input‐multiple‐output (MIMO) antenna designed for worldwide interoperability for microwave access (WiMAX) and wireless local area network (WLAN) applications is presented. The proposed antenna is composed of three printed dipoles with an integrated balun, the size of which is only 0.08 λ 2 . By introducing ground stubs between adjacent elements, impedance matching is improved and mutual coupling is reduced. A bandwidth of 51.6% (2.30–3.90 GHz) with S 11 < − 10 dB and S 12 , S 13 < − 10 dB is achieved, which can cover the whole three WiMAX bands and the 2.4 GHz WLAN band. Moreover, directional radiation patterns are achieved in these bands, and the average gain reaches 3.5 dB with up to 21.4 dB front‐to‐back ratio. The envelope correlation coefficient is below 0.038, which can provide good pattern diversity for a MIMO system.