Reducing the Interference in Compact MIMO Antennas of CRLH-TL-Based Broadside-Capacitive and Slot Couplings

  • Jang, Kyeongnam (Dept. of Information and Telecommunication Engineering) ;
  • Kahng, Sungtek (Dept. of Information and Telecommunication Engineering) ;
  • Yang, Inkyu (Dept. of Information and Telecommunication Engineering) ;
  • Kim, Hyeongseok (School of Electrical and Electronics Eng., Chung-Ang University) ;
  • Wu, Qun (Dept. of Electrical Engineering, Harbin Institute of Technology)
  • Received : 2013.04.18
  • Accepted : 2014.01.08
  • Published : 2014.05.01


In this paper, the interference in small MIMO antennas having two identical composite right- and left-handed transmission-line(CRLH-TL)-based radiating elements is remarkably decreased. The radiating element has the broadside-capacitive coupling as well as slots to be equivalent to the CRLH-TL to prevent the size from increasing for an LTE high band. The suspended line bridging the two radiating elements is optimized to lower the interference between them down to -23 dB, while the overall MIMO antenna system is compact and its antenna performance is acceptable. The design is tested for 2.5 GHz.


Mobile device;Compact antennas;CRLH;MIMO antennas;Low interference


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