The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지

Design and Performance Evaluation of MIMO Antenna for Handheld Devices

휴대 단말형 MIMO 안테나 설계 및 성능 평가

  • 문효상 (경희대학교 전자전파공학과) ;
  • 전계석 (경희대학교 전자정보대학) ;
  • 이범선 (경희대학교 전자정보대학)
  • Published : 2008.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

We design, fabricate, and measure a MIMO antenna system mountable on a small PCB (such as UMPC). The proposed antenna system accommodates three radiation elements on the PCB area of $40mm\;{\times}\;100mm$. Two of them employ a slot type and one uses a modified monopole with an inverted L shape expecting high isolation and polarization purity. The bandwidth of each proposed MIMO antenna ranges from 80MHz and 200MHz at the center frequency of 1.8 GHz. The isolations between ports have been found to be greater than 10dB over the interested frequency band. Besides, the proposed MIMO system has been evaluated in terms of ARC(Active Reflection Coefficient, TARC(Total ARC), correlation, MEG, and etc. The envelope correlation is calculated to be much less than 0.04 and the ratio of the mean effective gain(MEG) between the antennas is found to be close to unity.

본 논문에서는 UMPC급의 휴대 단말에 장착 가능한 소형 MIMO 안테나를 설계 및 측정 분석하였다. 제안된 MIMO 안테나는 두 개의 노치 안테나와 하나의 변형된 모노폴 안테나를 이용해서 $40mm\;{\times}\;100mm$ 기판안에 세개의 방사 소자를 넣은 것이다. 각 안테나는 중심 주파수 1.8GHz에서 80-200MHz의 대역폭을 가진다. 또 전 주파수 대역에서 격리도가 l0dB 보다 크게 나타나고 있다. 제안된 MIMO 안테나의 성능 평가를 위해서 ARC/TARC, correlation, MEG를 소개하고 안테나의 성능을 평가 하였다. 포락선 상관도는 0.04이하로 계산되었고 평균 유효 이득(MEG)은 1에 가깝게 나타났다.

Keywords

References

  1. George Tsoulos, MIMO System Technology for Wireless Communications, CRC Taylor & Francis, 2006
  2. Yue Gao, Xiaodong Chen, Clive Parini and Zhinong Ying, 'Study of a Dual-Element PIFA Array for MIMO Terminals,' AP-S, pp. 309-312, 2006
  3. Yujiang Wu and Nie Zaiping, 'A novel compact multi-antenna design for handheld terminals,' pp.446-449, 2005
  4. M. D. Deshpande and M. C. Bailey, 'Analysis fo finite phased arrays of circular microstip patches,' IEEE Trans. Antennas Propagation, Vol.37, pp.1355-1360, Nov., 1989 https://doi.org/10.1109/8.43554
  5. J. eomez-Tagle and C. G. Christodoulou, 'Broadband characterization of the active reflection coefficient of finite phased array microstip antennas,' IEEE Int. Conf. Phased Array Systems Technology, pp.255-258, 2000
  6. Manteghi, M. and Rahmat-Samii, Y., 'Multiport characteristics of a wide-band cavity backed annular patch antenna for multipolarization operations,' IEEE Trans. Antennas Propagation, Vol.53, Issue 1, pp.466-474, Jan., 2005 https://doi.org/10.1109/TAP.2004.838794
  7. R. Vaughan and J. Andersen, 'Antenna diversity in mobile communications,' IEEE Trans., Vol.36, No.4, pp.149-172, 1978
  8. R. Clarke, 'A statistical theory of mobile radio reception,' Bell Syst. Tech. J., No.2, pp. 957-1000, 1996
  9. R. Vaughan and J. B. Andersen, Eds., Channels, Propagation and Antennas, IEEE, 2003
  10. M. Jensen and Y. Rahmat-Samii, 'Performance analysis of antennas for hand-held transceivers using FDTD,' IEEE Trans. Antennas Propagation, Vol.42, No.8, pp.1106-1113, Aug., 1994 https://doi.org/10.1109/8.310002
  11. Z. Ying, T. Bolin, V. Plicanic, A. Derneryd, and G. Kristensson, 'Diversity antenna terminal evaluation,' IEEE Antennas Propagation Symp., Vol. 2A, pp.375-378, Jul., 2005
  12. S. Ko and R. Murch, 'Compact integrated diversity antenna for wireless communications,' IEEE Trans. Antennas Propagation, Vol. 49, No.6, pp.954-960, Jun., 2001 https://doi.org/10.1109/8.931154
  13. M. Schwartz, W. R. Bennett, and S. Stein, Eds., Communication Systems and Techniques., McGraw-Hill, 1966
  14. M. F. Abedin and M. Ali, 'Modifying the ground plane and its effect on planar inverted-F antennas (PIFAs) for mobile phone handsets,' IEEE Antennas Wireless Propagation Lett., Vol. 2, No.15, pp.226-229, 2003 https://doi.org/10.1109/LAWP.2003.819669
  15. T. Taga, 'Analysis of mean effective gain of mobile antennas in land mobile radio environments,' IEEE Trans., Vol.39, No.2, pp. 117-131, May, 1990