High‐efficiency scheme and optimisation technique for design of fragment‐type isolation structure between multiple‐input and multiple‐output antennas
High‐efficiency scheme and optimisation technique for design of fragment‐type isolation structure between multiple‐input and multiple‐output antennas
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DOI：
10.1049/iet-map.2014.0742
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发表时间：
2015-03
影响因子：
1.7
通讯作者：
D. Ding;G. Wang;Lu Wang
中科院分区：
文献类型：
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作者：
D. Ding;G. Wang;Lu Wang
片式结构在多输入多输出（MIMO）系统的高隔离结构设计中得到了应用。本文提出了一种基于分解结合增强遗传算子的多目标进化算法（MOEA/D-GO）的片段型隔离结构设计方案和高效优化搜索技术。在原MOEA/D-GO中考虑设计空间中的非均匀片段单元和结合二维中值滤波算子都可以提高优化搜索速度，同时以容量损失为代价获得更高的隔离度和更好的包络相关系数。通过高效率的优化搜索，还可以处理包括波束方向在内的更多设计目标。以工作频率为2.345 ~ 2.36 GHz、中心间隔为15 mm的两个MIMO平面倒f天线为例，对所提出的设计方案和高效搜索技术进行了验证。三种设计方案的对比结果验证了该方案和优化搜索技术的有效性。
Fragment-type structure has found its application in designing high isolation structure for multiple-input and multiple-output (MIMO) system. In this study, a novel design scheme and a high-efficiency optimisation searching technique for fragment-type isolation structure are proposed based on multiobjective evolutionary algorithm based on decomposition combined with enhanced genetic operators (MOEA/D-GO). Both considering non-uniform fragment cells in design space and combining two-dimensional median filtering operator in the original MOEA/D-GO can improve speed of optimisation searching while obtaining higher isolation and better envelope correlation coefficient at expense of capacity loss. With the high-efficiency optimisation search, more design objectives including the beam direction can be handled as well. The proposed design scheme and high-efficiency searching technique are demonstrated through design examples with two MIMO planar inverted-F antennas operating at 2.345–2.36 GHz and having a centre-to-centre interval of 15 mm. Comparison results among three designs verify the high effectiveness of the proposed scheme and optimisation searching technique.