A Dual-Band Decoupling Technique for MIMO Antenna Systems Using Composite Capacitor Circuits
A Dual-Band Decoupling Technique for MIMO Antenna Systems Using Composite Capacitor Circuits
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DOI：
10.1109/tcsii.2023.3305148
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发表时间：
2024-01
期刊：
影响因子：
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通讯作者：
Jiangwei Sui;Yi‐Feng Cheng;Xiaohu Fang;Du Li;Xiangwei Zhu;Xue-Feng Yuan
中科院分区：
文献类型：
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作者：
Jiangwei Sui;Yi‐Feng Cheng;Xiaohu Fang;Du Li;Xiangwei Zhu;Xue-Feng Yuan
本文介绍了一种利用复合电容器实现独立控制的双频天线去耦技术。由于去耦结构的固有频率选择特性，一个频带中的去耦对另一频带中的去耦几乎没有影响，因此可以简单地通过提供两个不同的期望电容来独立地控制两个频带中的去耦，这是使用所提出的复合电容器来实现的。给出了一个等效电路，揭示了其去耦和选频特性的机理。两个示范性的例子，使用建议的复合电容器电路进行了广泛的研究，仿真和测量。结果表明，采用所提出的解耦方案，不仅隔离度得到了提高，而且总效率和包络相关系数的性能也得到了改善。由于采用了复合电容，该双频去耦结构的总面积仅为5mm3，与现有的方法相比，具有非常小的体积.
This brief presents a dual-band antenna decoupling technique with independent control using composite capacitors. Due to the inherent frequency-selective characteristic of the decoupling structure, the decoupling in one band has almost no effect on that in the other band, so the decoupling in the two bands can be independently controlled simply by providing two different desired capacitances, which is achieved using the proposed composite capacitors. An equivalent circuit is presented to reveal the mechanism of the decoupling and frequency-selective characteristics. Two demonstrative examples using proposed composite capacitor circuits are extensively studied by simulation and measurement. The results show that with the proposed decoupling scheme, not only the isolation but also the performance of the total efficiencies and the envelope correlation coefficients are all improved. Benefiting from the composite capacitors, the total footprint of the dual-band decoupling structure is only $5\times3$ mm 2, which is extremely compact compared with the existing methods.