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Compact Antenna for 4G/5G Metal Frame Mobile Phone Applications Using a Tuning Line

机译：使用调谐线的4G / 5G金属框架手机应用的紧凑型天线

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摘要

A compact antenna with a 6 mm ground clearance for 4G and 5G metal frame mobile phones is proposed in this paper. The proposed antenna consists of a coupled line, a ground branch, a monopole branch, and a tuning line. The ground branch and the coupled line are used to obtain the lower band (698–960 MHz), the monopole branch is used to improve the match at the lower band and obtain the higher band (1710–2690, 3400–3800 MHz), and the tuning line is used to improve the match at the higher band. The novelty of the proposed antenna is that more modes are excited and work together to obtain multiple working bands, by using the coupled line and the folded branches with the help of the tuning line, and then nine bands are obtained under the conditions of a 6 mm, only, ground clearance and a metal frame environment. A prototype has been fabricated and measured. The measured ?6 dB impedance bandwidths are 345 MHz (0.685–1.03 GHz) and 2.16 GHz (1.67–3.83 GHz) at the lower and higher bands, respectively. The LTE700, GSM850, GSM900, DCS, PCS, UMTS, LTE2300, and LTE2500 bands for 2G, 3G, 4G, and the 3.5 GHz band that is possible for 5G are covered. The measured efficiencies and patterns are also presented.
机译：本文提出了一种紧凑型天线，其地面间隙为6G，适用于4G和5G金属框架手机。拟议的天线由耦合线，接地分支，单极分支和调谐线组成。接地分支和耦合线用于获得较低频带（698–960 MHz），单极分支用于改善较低频带的匹配并获得较高频带（1710–2690、3400–3800 MHz），调谐线用于改善较高频段的匹配度。所提出的天线的新颖之处在于，通过使用耦合线和折叠支路并借助调谐线，可以激发更多的模式并共同获得多个工作频带，然后在6的条件下获得9个频带。仅毫米，离地间隙和金属框架环境。原型已经制作完成并进行了测量。在较低和较高频段，测得的？6 dB阻抗带宽分别为345 MHz（0.685–1.03 GHz）和2.16 GHz（1.67–3.83 GHz）。涵盖了适用于2G，3G，4G的LTE700，GSM850，GSM900，DCS，PCS，UMTS，LTE2300和LTE2500频段以及适用于5G的3.5 GHz频段。还介绍了测得的效率和模式。

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