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首页> 外文期刊>Applied Computational Electromagnetics Society journal >Metamaterial Based Compact Branch-Line Coupler with Enhanced Bandwidth for Use in 5G Applications
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Metamaterial Based Compact Branch-Line Coupler with Enhanced Bandwidth for Use in 5G Applications

机译：具有增强带宽的超材料基层分支线耦合器，用于5G应用

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摘要

A novel compact 5G branch-line coupler (BLC) based on open-circuit coupled-lines and interdigital capacitor structure is presented in this paper. The proposed BLC shows the composite right/left handed (CRLH) metamaterial transmission-line (TL) operation. The proposed BLC is designed and simulated using CST microwave studio. The designed BLC is then fabricated using the FR4 substrate (epsilon(r) = 4.3 and h = 1.66mm). The proposed 5G BLC with coupled-lines and the interdigital capacitor has achieved the fractional bandwidth of similar to 40.2% and the size reduction of 54% as compared to the conventional BLC. The fabricated BLC operates at 2.74 - 4.15GHz frequency band with a coupling factor of -3 +/- 0.2dB and the phase difference of 88 degrees between the output ports. The BLC measurements are performed at the operating frequency of 3.5GHz. The simulated and measured scattering parameters and phase difference results are in good agreement with each other. The proposed design is suitable for use in future butler-matrix based beamforming networks for antenna array systems in 5G wireless applications.
机译：本文提出了一种基于开路耦合线和叉指电容器结构的新型紧凑型5G分支线耦合器（BLC）。所提出的BLC显示了复合右/左手（CRLH）超材料传输线（TL）操作。建议的BLC使用CST微波工作室设计和模拟。然后使用FR4基板制造设计的BLC（ε（R）= 4.3和H = 1.66mm）制造。与常规BLC相比，所提出的5GBLC具有耦合线和叉指电容器的分数带宽与常规BLC相比，尺寸降低了54％。制造的BLC在2.74-4.15GHz的频带操作，耦合因子为-3 +/- 0.2dB，输出端口之间的88度的相位差。 BLC测量以3.5GHz的工作频率进行。模拟和测量的散射参数和相位差结果彼此吻合良好。所提出的设计适用于5G无线应用中的用于天线阵列系统的未来巴特勒 - 矩阵基于波束成形网络。

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