Open AccessOptimised 4 × 4 millimetre‐wave antenna array with DGS using hybrid ECFO‐NM algorithm for 5G mobile networks
Author(s) -
Mahmoud Korany R.,
Montaser Ahmed M.
Publication year - 2017
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2016.0959
Subject(s) - beamwidth , radiation pattern , antenna array , return loss , ground plane , reflection coefficient , electronic engineering , antenna (radio) , extremely high frequency , computer science , engineering , electrical engineering , telecommunications
A novel optimised 4 × 4 microstrip patch antenna array operating in the 28−38 GHz frequency range for fifth generation mobile networks is presented. The proposed structure is fed by the corporate feed network printed on the same side of the substrate. To improve the array radiation characteristics, a defected ground plane structure (DGS), which acts as coupled c‐shaped in the ground plane, is used. The dimensions of the antenna array structure are optimised using a new hybrid approach involving the enhanced central force optimisation (ECFO) and Nelder–Mead (NM) algorithms. To illustrate the convergence capability of the ECFO‐NM algorithm, the results are compared with those obtained using stand‐alone ECFO and particle swarm optimisation algorithms. The results show the effect of DGS on the antenna performance characteristics, i.e. the radiation efficiency and return loss are improved, on average, by ∼17.14 and 69.2%, respectively. Furthermore, the realised antenna gain was increased by 2.44 dBi with a negligible effect on the half‐power beamwidth. The optimised antenna array yielded a broadband impedance bandwidth higher than 32% for a reflection coefficient lower than −12 dB and a total realised gain of up to 18.65 dBi, which makes it suitable for imaging applications and millimetre‐wave wireless communications.