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Dual antenna system for metal frame mobile phone applications

机译：用于金属框架手机应用的双天线系统

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摘要

A dual antenna system with 77 mm × 10 mm × 7.5 mm for metal frame(MF) LTE/GPS mobile phones is proposed and studied. The antenna proposedin this study comprises two antenna elements (Ant 1 and Ant 2) and adecoupling line. Ant 1 as the main antenna that covers the lower band(698-960 MHz), the GPS band, and the higher band (1710-2690 MHz) consistingof a ground branch, a coupled line, and a tuning line. Ant 2 as the auxiliaryantenna that covers the higher band consisting of a monopole branch anda match circuit. Ant 1 and Ant 2 form a two-element MIMO antenna coveringthe higher band. The advantages of the proposed antenna are that the mainantenna (Ant 1) covers the GPS band and all of the 2G/3G/4G bands, and thetwo-element MIMO antenna covering the higher band, which consists of Ant1 and Ant 2 located at the same side of a mobile phone with an MF, isobtained. A prototype is manufactured and tested. For Ant 1, the measuredworking bands (under −6 dB condition) are 685 to 965 MHz and 1480 to2800 MHz, and the LTE700, GSM850, GSM900, GPS, GSM1800, GSM1900,UMTS, LTE2300, and LTE2500 bands are covered. For Ant 2, the measuredworking band (under −6 dB condition) is 1640 to 2720 MHz, and theGSM1800, GSM1900, UMTS, LTE2300, and LTE2500 bands are covered.The measured isolations between Ant 1 and Ant 2 are larger than 12 dB at theworking bands. The measured efficiencies, envelope correlation coefficients,and mean effective gains are also presented.
机译：提出并研究了用于金属框架LTE / GPS手机的77 mm×10 mm×7.5 mm双天线系统。本研究中提出的天线包括两个天线元件（Ant 1和Ant 2）和耦合线。蚂蚁1作为主要天线，覆盖由地分支，耦合线和调谐线组成的较低频段（698-960 MHz），GPS频段和较高频段（1710-2690 MHz）。蚂蚁2作为辅助天线，覆盖由单极分支和匹配电路组成的较高频段。蚂蚁1和蚂蚁2形成覆盖更高频段的两元素MIMO天线。拟议天线的优点是：主天线（Ant 1）覆盖了GPS频段和所有2G / 3G / 4G频段，而双元素MIMO天线覆盖了更高的频段，它由位于天线1处的Ant1和Ant 2组成。获得了带有MF的手机的同一侧。原型被制造和测试。对于Ant 1，测得的工作频带（在−6 dB条件下）为685至965 MHz和1480至2800 MHz，并且涵盖了LTE700，GSM850，GSM900，GPS，GSM1800，GSM1900，UMTS，LTE2300和LTE2500频带。对于Ant 2，测得的工作频带（在−6 dB条件下）为1640至2720 MHz，并且覆盖了GSM1800，GSM1900，UMTS，LTE2300和LTE2500频带.Ant 1和Ant 2之间的测得隔离度大于12 dB工作乐队。还介绍了测得的效率，包络相关系数和平均有效增益。

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