Hybrid dual-antenna for the 3.6-GHz LTE operation in the tablet computer

作者：Wong Kin Lu^*; Chang Hsuan Jui

来源：Microwave and Optical Technology Letters, 2015, 57(11): 2592-2598.

DOI：10.1002/mop.29387

• mobile antennas
• dual-antenna
• hybrid antennas
• tablet computer antennas
• LTE antennas
• small-size antennas

A hybrid dual-antenna formed by an inverted-F antenna (IFA) and an open-slot antenna (OSA) for the 3.6-GHz LTE operation (3.4-3.8 GHz) in the tablet computer is presented. The dual-antenna is printed on a 0.8-mm thick FR4 substrate and has a compact planar structure of 4 x 30 mm(2). The dual-antenna comprises a clearance region wherein the IFA is disposed and a metal pad wherein the OSA is embedded. The IFA's shorting strip is grounded through the metal pad to the device ground plane, so that an integrated compact dual-antenna structure is obtained. As the IFA and OSA have different excitation mechanisms (electric-current excitation on the IFA vs. magnetic-current excitation on the OSA), the two antennas are expected to have different near-field characteristics, thereby leading to decreased coupling. The proposed dual-antenna has a measured isolation of better than about 12 dB over the operating band. The IFA and OSA have measured antenna efficiencies of about 72%-86% and 57%-78%, respectively. Good envelope correlation coefficient of less than 0.1 is obtained. Over the operating band, the ergodic capacity of the dual-antenna is calculated to be about 9.8-10.6 bps/Hz. Details of the proposed dual-antenna are presented.

• 出版日期2015-11
• 单位中山大学