A wideband eight‐element antenna based on slot modes for 5G metal frame mobile phones is proposed. The proposed antenna has two kinds of elements that both have four elements. Both kinds of elements consist of a coupled line and a closed slot. The slot sizes of the two kinds of elements are 26 mm × 2.5 mm and 28.5 mm × 2.5 mm, respectively. The measured working bands (under the condition of the reflection coefficients smaller than −6 dB) of the two kinds of elements are 3.3 to 5 GHz and 3.3 to 4.2 GHz, respectively. The eight elements can form an eight‐element MIMO antenna system working at the band of 3.3 to 4.2 GHz and a four‐element MIMO antenna system working at the band of 3.3 to 5 GHz. For the first kind of elements, the measured gains at the working band of 3.3 to 5 GHz are 2.23 to 4.29 dBi. For the second kind of elements, the measured gains at the working band of 3.3 to 4.2 GHz are 1.83 to 3.95 dBi. At the working bands, the measured isolations and efficiencies are bigger than 10 dB and 45%, respectively, the envelop correlation coefficients (ECCs) are smaller than 0.26, and the ratios of mean effective gains (MEGs) are smaller than 1.26 dB. With a 20 dB signal‐to‐noise ratio (SNR), at the band of 3.3 to 4.2 GHz, the ergodic channel capacity of the proposed eight‐element MIMO antenna system in an 8 × 8 MIMO system is 36.5 to 37.8 bps/Hz; at the band of 3.3 to 5 GHz, the ergodic channel capacity of the proposed four‐element MIMO antenna system in a 4 × 4 MIMO system is 18.5 to 19.6 bps/Hz.

中文翻译：

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适用于5G金属框架移动电话应用的宽带八元素天线

提出了一种基于时隙模式的宽带8元素天线，用于5G金属框架手机。所提出的天线具有两种元素，两者均具有四个元素。两种元件都由耦合线和闭合槽组成。两种元件的插槽尺寸分别为26 mm×2.5 mm和28.5 mm×2.5 mm。两种元件的测量工作频带（在反射系数小于-6 dB的条件下）分别为3.3至5 GHz和3.3至4.2 GHz。八个元素可以组成一个工作在3.3至4.2 GHz频段的八元素MIMO天线系统和一个工作在3.3至5 GHz频段的四元素MIMO天线系统。对于第一种元素，在3.3至5 GHz的工作频带上测得的增益为2.23至4.29 dBi。对于第二种元素，在3.3至4.2 GHz的工作频带上测得的增益为1.83至3.95 dBi。在工作频段，测得的隔离度和效率分别大于10 dB和45％，包络相关系数（ECC）小于0.26，平均有效增益（MEG）的比率小于1.26 dB。在3.3至4.2 GHz的频带上，信噪比（SNR）为20 dB时，在8×8 MIMO系统中拟议的八元MIMO天线系统的遍历信道容量为36.5至37.8 bps / Hz ; 在3.3至5 GHz频段，在4×4 MIMO系统中，拟议的四元素MIMO天线系统的遍历信道容量为18.5至19.6 bps / Hz。包络相关系数（ECC）小于0.26，平均有效增益（MEG）的比率小于1.26 dB。在3.3至4.2 GHz的频带上，信噪比（SNR）为20 dB时，在8×8 MIMO系统中拟议的八元MIMO天线系统的遍历信道容量为36.5至37.8 bps / Hz ; 在3.3至5 GHz频段，在4×4 MIMO系统中，拟议的四元素MIMO天线系统的遍历信道容量为18.5至19.6 bps / Hz。包络相关系数（ECC）小于0.26，平均有效增益（MEG）的比率小于1.26 dB。在3.3至4.2 GHz的频带上，信噪比（SNR）为20 dB时，在8×8 MIMO系统中拟议的八元MIMO天线系统的遍历信道容量为36.5至37.8 bps / Hz ; 在3.3至5 GHz频段，在4×4 MIMO系统中，拟议的四元素MIMO天线系统的遍历信道容量为18.5至19.6 bps / Hz。