KSII Transactions on Internet and Information Systems (TIIS)

Korean Society for Internet Information (한국인터넷정보학회)
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A High-Isolation MIMO Antenna with Dual-Port Structure for 5G Mobile Phones

  • Yang, Hyung-kyu (Electronic, Electrical, Control & Instrumentation Engineering, Hanyang University) ;
  • Lee, Won-Woo (ICT Convergence Research Division, Korea Expressway Corporation Research Institute) ;
  • Rhee, Byung-Ho (The Division of Computer Science and Engineering, Hanyang University)
  • Received : 2017.04.16
  • Accepted : 2017.11.29
  • Published : 2018.04.30
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Abstract

In this letter, a new dual-port Multiple-Input Multiple-Output (MIMO) antenna is introduced which has two independent signal feeding ports in a single antenna element to achieve smaller antenna volumes for the 5G mobile applications. The dual-port structure is implemented by adding a cross coupled semi-loop (CCSL) antenna as the secondary radiator to the ground short of inverted-F antenna (IFA). It is found that the port to port isolation is not deteriorated when an IFA and CCSL is combined to form a dual-port structure. The isolation property of the proposed antenna is compared with a polarization diversity based dual-port antenna proposed in the literature [9]. The operating frequency range is 3.3-4.0 GHz which is suitable for places where $4{\times}4$ MIMO systems are supposed to be deployed such as in China, EU, Korea and Japan at the band ${\times}$ (3.3 - 3.8GHz. The measured 6-dB impedance bandwidths of the proposed antennas are larger than 700 MHz with isolation between the feeding ports higher than 18 dB [1-2]. The simulation and measurement results show that the proposed antenna concept is a very promising alternative for 5G mobile applications.

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References

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