Reconfigurable narrow open-slot LTE MIMO antennas for metal-rimmed smartphone applications

Shu-Chuan Chen and Sheng-Min Li

Journal of Electromagnetic Waves and Applications, 2021, vol. 35, issue 11, 1477-1492

Abstract: 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.

Date: 2021
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DOI: 10.1080/09205071.2021.1897689

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