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- Title
Boundary‐based optimization strategies for design of fragment‐type isolation structure in compact MIMO systems.
- Authors
Ding, Dawei; Yang, Lixia; Shi, Lijuan; Li, Dawei
- Abstract
Fragment‐type structures have been used to acquire high isolation in compact multiple‐input and multiple‐output (MIMO) systems. In this paper, two novel optimization strategies, boundary‐based two‐dimensional (2D) median filtering operator and boundary‐based 2D weighted sum filtering operator, are proposed to design fragment‐type isolation structures first when specific boundary conditions are considered in engineering designs. Second, two computer aided optimization techniques are proposed through combining these two operators with MOEA/D‐GO (multi‐objective evolutionary algorithm based on decomposition combined with enhanced genetic operators), respectively. Finally, fragment‐type isolation structures of a compact MIMO PIFAs (planar inverted‐F antennas) system operating at 2.345‐2.36 GHz are designed. Comparison results show that more alternative designs could be found at the expense of searching speed, and both better front‐back‐ratio and wider impedance bandwidth are observed.
- Subjects
MIMO systems; MEDIAN filters (Electronics); BOUNDARY value problems; EVOLUTIONARY algorithms; PLANAR inverted-F antennas
- Publication
International Journal of RF & Microwave Computer-Aided Engineering, 2019, Vol 29, Issue 2, pN.PAG
- ISSN
1096-4290
- Publication type
Article
- DOI
10.1002/mmce.21531