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2019-04-26
Envelope Correlation Coefficient of a Two-Port MIMO Terminal Antenna Under Uniform and Gaussian Angular Power Spectrum with User's Hand Effect
By
Progress In Electromagnetics Research C, Vol. 92, 123-136, 2019
Abstract
This paper studies the effect of incident wave angular power spectrum (APS) distribution and user hand effect on the envelope correlation coefficient (ECC) of two port MIMO antenna operating in frequency band of LTE-U sub 6 GHz. APS of uniform and Gaussian distributions are used with different Gaussian angular spread (AS) values i.e. 10˚, 30˚, 50˚ and 70˚. A prototype was fabricated, and three-dimensional radiation patterns of antenna elements were measured in anechoic chamber from 4 to 6 GHz in both cases of free space and when the user hand phantom grips the prototype in data mode. An algorithm to calculate ECC from the complex data of far field radiation pattern with different APS distributions is explained in details. Results show that user hand presence increases ECC between ports compare with free space, whose increase is more obvious under Gaussian APS. ECC values under uniform APS is practically zero over the entire frequency range expect at frequency values close to 6 GHz where the highest ECC values are 0.13 and 0.16 in free space and with user hand respectively. However, Gaussian APS with different AS's shows a significant impact of the ECC. With narrow AS of 10˚, ECC at some incident directions can be as high as 0.84 and 0.92 in free space and with user hand respectively and the mean ECC values under this AS are 0.25 and 0.37 respectively. ECC values keep decreasing as AS gets wider, at AS = 70˚, maximum ECC values are 0.23 and 0.34 in free space and with user hand respectively with mean values close to uniform APS. Statistical distribution of ECC show good agreement with exponential distribution, more agreement between measured ECC and exponential distribution is observed in free space with wider AS.
Citation
Ahmed Mohamed Elshirkasi, Azremi Abdullah Al-Hadi, Mohd Fais Mansor, Rizwan Khan, and Ping Jack Soh, "Envelope Correlation Coefficient of a Two-Port MIMO Terminal Antenna Under Uniform and Gaussian Angular Power Spectrum with User's Hand Effect," Progress In Electromagnetics Research C, Vol. 92, 123-136, 2019.
doi:10.2528/PIERC19011006
References

1. Kaiser, T. and F. Zheng, Ultra Wideband Systems with MIMO, John Wiley & Sons, 2010.

2. Rappaport, T. S., Y. Xing, G. R. MacCartney, Jr., A. F. Molisch, E. Mellios, and J. Zhang, "Overview of millimeter wave communications for fifth-generation (5G) wireless networks — With a focus on propagation models," IEEE Trans. Antennas Propag., Vol. 65, No. 12, 6213-6230, 2017.

3. Zhekov, S. S., A. Tatomirescu, E. Foroozanfard, and G. F. Pedersen, "Experimental investigation on the effect of user’s hand proximity on a compact ultrawideband MIMO antenna array," IET Microwaves, Antennas Propag., Vol. 10, No. 13, 1402-1410, 2016.

4. Andersen, J. B., L. Fellow, J. Ø. Nielsen, and G. F. Pedersen, "Absorption related to hand-held devices in data mode," IEEE Transactions on Electromagnetic Compatibility, Vol. 58, No. 1, 47-53, 2016.

5. Allen, W. N. and D. Peroulis, "Bandwidth-optimal single-tunable-element matching network for antenna tuning in mobile handsets," 2011 IEEE MTT-S International Microwave Symposium Digest (MTT), 1-4, 2011.

6. Li, Y., Y. Luo, and G. Yang, "12-port 5G massive MIMO antenna array in sub-6GHz mobile handset for LTE bands 42/43/46 applications," IEEE Access, Vol. 6, 344-354, 2018.

7. Khan, R., A. A. Al-Hadi, and P. J. Soh, "Recent advancements in user effect mitigation for mobile terminal antennas: A review," IEEE Transactions on Electromagnetic Compatibility, Vol. 61, No. 1, 1-9, 2018.

8. Ban, Y.-L., C. Li, G. Wu, and K.-L. Wong, "4G/5G multiple antennas for future multi-mode smartphone applications," IEEE Access, Vol. 4, 2981-2988, 2016.

9. Li, M.-Y., Y.-L. Ban, Z.-Q. Xu, G. Wu, K. Kang, and Z.-F. Yu, "Eight-port orthogonally dualpolarized antenna array for 5G smartphone applications," IEEE Trans. Antennas Propag., Vol. 64, No. 9, 3820-3830, 2016.

10. Wong, K.-L., C.-Y. Tsai, and J.-Y. Lu, "Two asymmetrically mirrored gap-coupled loop antennas as a compact building block for eight-antenna MIMO array in the future smartphone," IEEE Trans. Antennas Propag., Vol. 65, No. 4, 1765-1778, 2017.

11. Sharawi, M. S., "Current misuses and future prospects for printed multiple-input, multiple-output antenna systems," IEEE Antennas Propag. Mag., Vol. 59, No. 2, 162-170, 2017.

12. Tian, R., B. K. Lau, and Z. Ying, "Multiplexing efficiency of MIMO antennas in arbitrary propagation scenarios," 2012 6th European Conference on Antennas and Propagation (EUCAP), 373-377, 2012.

13. Taga, T., "Analysis for mean effective gain of mobile antennas in land mobile radio environments," IEEE Trans. Veh. Technol., Vol. 39, No. 2, 117-131, 1990.

14. Dong, L., H. Ling, and R. W. J. Heath, "Multiple-input multiple-output wireless communication systems using antenna pattern diversity," IEEE Global Telecommunications Conference, 2002, GLOBECOM’02, Vol. 1, 997-1001, 2002.

15. Pedersen, K. I., P. E. Mogensen, and B. H. Fleury, "Power azimuth spectrum in outdoor environments," Electron. Lett., Vol. 33, No. 18, 1583-1584, 1997.

16. Sharawi, M. S., A. T. Hassan, and M. U. Khan, "Correlation coefficient calculations for MIMO antenna systems: A comparative study," Int. J. Microw. Wirel. Technol., Vol. 9, No. 10, 1991-2004, 2017.

17. Blanch, S., J. Romeu, and I. Corbella, "Exact representation of antenna system diversity performance from input parameter description," Electron. Lett., Vol. 39, No. 9, 705-707, 2003.

18. Stjernman, A., "Relationship between radiation pattern correlation and scattering matrix of lossless and lossy antennas," Electron. Lett., Vol. 41, No. 12, 1, 2005.

19. Hallbjorner, P., "The significance of radiation efficiencies when using S-parameters to calculate the received signal correlation from two antennas," IEEE Antennas Wirel. Propag. Lett., Vol. 4, No. 1, 97-99, 2005.

20. Vaughan, R. G. and J. B. Andersen, "Antenna diversity in mobile communications," IEEE Trans. Veh. Technol., Vol. 36, No. 4, 149-172, 1987.

21. Sun, D. and C. Wei, "Analysis and design of 4 × 4 MIMO-antenna systems in mobile phone," J. Comput. Commun., Vol. 4, No. 2, 26, 2016.

22. Tounou, C. A., C. Decroze, D. Carsenat, T. Monediere, and B. Jecko, "Mobile communication antennas in uniform and Gaussian propagation channels," The Second European Conference on Antennas and Propagation, EuCAP 2007, Edinburgh, UK, 2007.

23. Kyosti, P., "WINNER II channel models," IST, Tech. Rep. IST-4-027756 Win. II D1. 1.2 V1. 2, 2007.

24. Vasilev, I., V. Plicanic, and B. K. Lau, "Impact of antenna design on MIMO performance for compact terminals with adaptive impedance matching," IEEE Trans. Antennas Propag., Vol. 64, No. 4, 1454-1465, 2016.

25. Buskgaard, E., A. Tatomirescu, S. C. Del Barrio, O. Franek, and G. F. Pedersen, "User effect on the MIMO performance of a dual antenna LTE handset," 2014 8th European Conference on Antennas and Propagation (EuCAP), 2006-2009, 2014.

26. Stavrou, E., H. Shakhtour, J. Pamp, and D. Heberling, "2-port antenna on fleece substrate for onbody mimo applications," 2012 6th European Conference on Antennas and Propagation (EUCAP), 3317-3321, 2012.

27. Malviya, L., R. K. Panigrahi, and M. V Kartikeyan, "A 2 × 2 dual-band MIMO antenna with polarization diversity for wireless applications," Progress In Electromagnetics Research C, Vol. 61, 91-103, 2016.

28. Ilvonen, J., R. Valkonen, J. Holopainen, and V. Viikari, "Multiband frequency reconfigurable 4G handset antenna with MIMO capability," Progress In Electromagnetics Research, Vol. 148, 233-243, 2014.