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A Study on the Enhancement of Isolation of the MIMO Antenna for LTE/DCS1800/USPCS1900 Handset  

Cho, Dong-Ki (Engineering Research Institute, Gyeongsang National University)
Son, Ho-Cheol (Engineering Research Institute, Gyeongsang National University)
Lee, Jin-Woo (Antenna R&D Center, Karam-Solution Co,. Ltd.)
Lee, Sang-Woon (Antenna R&D Center, Karam-Solution Co,. Ltd.)
Lee, Mun-Soo (Engineering Research Institute, Gyeongsang National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.47, no.10, 2010 , pp. 80-85 More about this Journal
Abstract
In this paper, a MIMO antenna is proposed for LTE/DCSl800/USPCSl900 handset applications. The proposed antenna is based on the IFA and its wide bandwidth is obtained by using a stagger tuning technique. To improve the isolation, a suspended line is connected to the shorting points in two antennas, and capacitors and inductors are added to the connected suspended line. Two identical antennas of which dimension is 2.8cc($40{\times}10{\times}7mm$) are mounted on the two end lines of the system ground plane($40{\times}60mm$). Analysis of the antenna performance and optimization is performed using CST Microwave Studio. The bandwidths are satisfied for LTE band class 13(746-787MHz), class 14(758-798MHz) and DCSl800/USPCSl900 band (1710-1990MHz). The isolations between two antennas are about -12dB for LTE band and -10dB for DCSl800/USPCSl900 band. And the radiation efficiency of each antenna is about for LTE band 33% and 45% for DCSl800/USPCSl900 band respectively.
Keywords
LTE; MIMO antenna; Suspended line;
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