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首页> 外文期刊>Applied Computational Electromagnetics Society journal >Mutual Coupling Reduction in CBS Antenna Arrays by Utilizing Tuned EM-EBG and Non-planar Ground Plane
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Mutual Coupling Reduction in CBS Antenna Arrays by Utilizing Tuned EM-EBG and Non-planar Ground Plane

机译：利用调谐的EM-EBG和非平面接地平面降低CBS天线阵列的相互耦合

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摘要

Radiation surface wave (surface current) on ground plane has a destructive effect on the characteristics of antennas which benefits from a common ground plane, especially Cavity Backed Slot (CBS) antennas. Surface current increases mutual coupling in an antenna array. This in turn causes unwanted characteristics in array applications. The main goal of this work is to design a new modified antenna array achieving less mutual coupling by reshaping ground plane and using tuned Elongated Mushroom Electromagnetic Band Gap (EM-EBG). Moreover, in this study, we focus on the influence of changing depth of EM-EBG holes. In this regard, four different designs for CBS antenna arrays are investigated. The results reveals that by using two new methods, namely stepped ground plane and tuned EMEBG, mutual coupling will be decreased by more than 9 dB. Decrement of mutual coupling improve radiation characteristic of array such as Front to Back Ratio (FBR) by 8 dB. The effectiveness of our design is confirmed by experimental results.
机译：接地平面上的辐射表面波（表面电流）会对天线的特性产生破坏性影响，这得益于共用的接地平面，尤其是空腔后向缝隙（CBS）天线。表面电流增加了天线阵列中的互耦合。反过来，这会导致阵列应用程序出现不必要的特性。这项工作的主要目的是设计一种新的改进的天线阵列，该天线阵列可以通过重塑接地平面并使用调谐的蘑菇形电磁带隙（EM-EBG）来实现较小的互耦。而且，在这项研究中，我们集中于改变EM-EBG孔深度的影响。在这方面，研究了CBS天线阵列的四种不同设计。结果表明，通过使用阶梯接地平面和调谐EMEBG这两种新方法，相互耦合将减少9 dB以上。互耦的减小将阵列的辐射特性（如前后比（FBR））提高了8 dB。实验结果证实了我们设计的有效性。

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