Design of a multi-input multi-output antenna with improved isolation using RF choke for long-term evolution mobile application

Abstract

A multi-input multi-output (MIMO) antenna with improved isolation using radio frequency choke (RFC) is proposed.The proposed MIMO antenna consists of two radiating elements and an RFC that is located in between the two radiating elements. To improve the isolation between the two radiating elements of the MIMO antenna, the RF signal is suppressed at the desired frequency band by utilizing an RFC. The isolation is improved by approximate to 20 dB at the center frequency. The fabricated antenna satisfies the 6 dB return loss in long-term evolution band 13 from 746 to 787 MHz. The measured average efficiency and gain of the MIMO antenna are about 30.5% and 1.5 dBi, respectively. The measured envelope correlation coefficient is less than 0.4 over the frequency band of interest. (c) 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:15691574, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27623