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A Compact Ultrawideband MIMO Antenna With WLAN Band-Rejected Operation for Mobile Devices

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4 Author(s)
Jae-Min Lee ; Department of Radio Science and Engineering, College of Engineering, Chungnam National University, Yuseong-gu, Korea ; Ki-Baek Kim ; Hong-Kyun Ryu ; Jong-Myung Woo

This letter presents an ultrawideband multiple-input-multiple-output (MIMO) antenna that covers the WCDMA (1.92-2.17 GHz), WiMAX (2.3, 2.5 GHz), WLAN (2.4 GHz), and UWB (3.1-10.6 GHz) bands for wireless device applications. The proposed antenna consists of a printed folded monopole antenna coupled with a parasitic inverted-L element, with an open stub inserted in the antenna to reject the WLAN (5.15-5.85 GHz) band that interferes with the UWB band. These two antennas are symmetrically arranged on a mobile device substrate. The -10-dB bandwidth of the designed antenna is 1.85-11.9 GHz without the WLAN band 5.15-5.85 GHz. S21 and the envelope correlation coefficient are lower than -17.2 dB and 0.18 in the operating bands, respectively. The size of the antenna is 55 ×13.5 × mm2.

Published in:

IEEE Antennas and Wireless Propagation Letters  (Volume:11 )