This paper presents a ‘reconfigurable narrow open-slot LTE MIMO antennas for metal-rimmed smartphone applications,’ which consist of two structurally identical L-shaped slot antennas combined with a metal rim with a 1 mm wide opening. The slots are 3 mm wide and 90 mm long, and are placed diagonally on the upper left and lower right corners of the mobile phone in a mirror-symmetrical manner to achieve good isolation. The 1 mm wide opening divides the L-slot structure into a longer open-slot and a shorter open-slot, and two different feed monopoles are designed to couple and excite the resonance modes of the slot by switching between the two different feed monopoles to cover LTE700/GSM850/900 and GSM1800/1900/UMTS/LTE2300/2500, respectively. The measured isolation is better than 11 dB, the measured antenna efficiency is better than 40%, and the calculated ECCs from measured radiation patterns are lower than 0.3.

本文介绍了一种“用于金属边框智能手机应用的可重构窄开槽 LTE MIMO 天线”，它由两个结构相同的 L 形缝隙天线和一个具有 1 毫米宽开口的金属边框组成。插槽宽3毫米，长90毫米，以镜面对称的方式对角放置在手机的左上角和右下角，以达到良好的隔离效果。1mm宽的开口将L型槽结构分为较长的开槽和较短的开槽，设计了两个不同的馈电单极子，通过在两个不同的馈电单极子之间切换来耦合和激发槽口的谐振模式分别覆盖LTE700/GSM850/900和GSM1800/1900/UMTS/LTE2300/2500。实测隔离度优于11 dB，实测天线效率优于40%，