An Envelope Correlation Formula for (N,N) MIMO Antenna Arrays Using Input Scattering Parameters, and Including Power Losses

The scattering parameter formulation for the envelope correlation in an (N,N) MIMO antenna array has been modified to take the intrinsic antenna power losses into account. This method of calculation provides a major simplification over the use of antenna radiation field patterns. Its accuracy is illustrated in three examples, which also show that the locations of the correlation minima are sensitive to the intrinsic losses.

[1]  Rodney G. Vaughan,et al.  Closely spaced monopoles for mobile communications , 1993 .

[2]  Hüseyin Arslan,et al.  On the correlation analysis of antennas in adaptive MIMO systems with 3-D multipath scattering , 2004, 2004 IEEE Wireless Communications and Networking Conference (IEEE Cat. No.04TH8733).

[3]  R. Janaswamy.  Effect of element mutual coupling on the capacity of fixed length linear arrays , 2002, IEEE Antennas and Wireless Propagation Letters.

[4]  S. Stein.  On cross coupling in multiple-beam antennas , 1962 .

[5]  Zhi Ning Chen,et al.  An Ultrawideband Diversity Antenna , 2009, IEEE Transactions on Antennas and Propagation.

[6]  Jordi Romeu Robert,et al.  Exact representation of antenna system diversity performance from input parameter description , 2003 .

[7]  D. Gapski,et al.  Direct Measurement of Small Antenna Radiation Efficiency by Calorimetric Method , 2006, IEEE Transactions on Antennas and Propagation.

[8]  T.S.P. See,et al.  Correlation analysis of UWB MIMO antenna system configurations , 2008, 2008 IEEE International Conference on Ultra-Wideband.

[9]  K. Sawaya,et al.  Comparison of experimental methods for measuring radiation efficiency of antennas for portable telephones , 1998, IEEE Antennas and Propagation Society International Symposium. 1998 Digest. Antennas: Gateways to the Global Network. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.98CH36.

[10]  M. J. Gans,et al.  On Limits of Wireless Communications in a Fading Environment when Using Multiple Antennas , 1998, Wirel. Pers. Commun..

[11]  G. Kristensson,et al.  Antenna signal correlation and its relation to the impedance matrix , 2004 .

[12]  R.G. Vaughan,et al.  Antenna diversity in mobile communications , 1987, IEEE Transactions on Vehicular Technology.

[13]  P. Hallbjörner.  The significance of radiation efficiencies when using S-parameters to calculate the received signal correlation from two antennas , 2005 .

[14]  Raed A. Abd-Alhameed,et al.  A modified radiometric method for measuring antenna radiation efficiency , 2003 .

[15]  Anders Derneryd,et al.  Signal correlation including antenna coupling , 2004 .

[16]  R. Clarke.  A statistical theory of mobile-radio reception , 1968 .

[17]  Jesper Thaysen,et al.  Envelope correlation in (N, N) MIMO antenna array from scattering parameters , 2006 .

[18]  C. Icheln,et al.  Five-element inverted-F antenna array for MIMO communications and radio direction finding on mobile terminal , 2009, 2009 Loughborough Antennas & Propagation Conference.

[19]  P.S.H. Leather,et al.  Antenna diversity for UHF handportable radio , 2003 .

[20]  P. Kildal,et al.  Radiation efficiency, correlation, diversity gain and capacity of a six-monopole antenna array for a MIMO system: theory, simulation and measurement in reverberation chamber , 2005 .

[21]  Haili Zhang,et al.  A compact MIMO antenna for wireless communication , 2008, IEEE Antennas and Propagation Magazine.

[22]  Per-Simon Kildal,et al.  Diversity Characterization of Optimized Two-Antenna Systems for UMTS Handsets , 2007, EURASIP J. Wirel. Commun. Netw..

[23]  Michael Faulkner,et al.  MIMO complexity reduction through antenna selection , 2003 .