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UWB MIMO antenna implemented with orthogonal quasi‐circular slot dipole radiators
Author(s) -
TiradoMéndez José Alfredo,
GómezVillanueva Ricardo,
JardónAguilar Hildeberto,
FritzAndrade Erik,
RangelMerino Arturo
Publication year - 2019
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21974
Subject(s) - reflection coefficient , mimo , radiation pattern , antenna measurement , dipole antenna , diversity gain , physics , antenna (radio) , antenna efficiency , antenna gain , slot antenna , antenna factor , coaxial antenna , acoustics , electronic engineering , optics , telecommunications , computer science , engineering , channel (broadcasting)
In this paper, a very low‐profile two‐port ultra‐wideband antenna for multiple input‐multiple output applications is proposed. The antenna is implemented by using two orthogonal quasi‐circular slot dipole radiators fed by coaxial lines. The antenna performs from 2 to 10 GHz, with an average peak‐gain of 4 dB, and high port isolation, with values around S 21 = −20 dB and below. The radiation patterns of both antennas are opposite to each other and hence, the diversity gain reaches values around 20 dB. The low inter‐port coupling and low correlation are verified by obtaining the envelope correlation coefficient, which is lower than 0.003. These calculations were made by the S ‐parameter and far‐field methods. The total active reflection coefficient shows that the antenna operative bandwidth does not change for different input signals with random phases, preserving the operation from 2 to 10 GHz. The antenna performance is compared to different state of the art slot configurations, showing advantages to previously published work.