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Effect of element mutual coupling on the capacity of fixed length linear arrays

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1 Author(s)
Janaswamy, R. ; Dept. of Electr. & Comput. Eng., Univ. of Massachusetts, Amherst, MA, USA

The effect of element mutual coupling on the capacity of multiple-input-multiple-output (MIMO) antenna systems is demonstrated by considering a fixed-length linear array of half-wave dipoles. Mutual coupling between elements, which influences both the spatial correlation and the received signal-to-noise ratio (SNR), is taken into account by means of the impedance matrix. Monte Carlo simulations are performed for both single-sided (i.e., transmitting end or receiving end) and double-sided fading correlations. It is shown that mutual coupling results in substantially lower capacity and, hence, in reduced degrees of freedom.

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Antennas and Wireless Propagation Letters, IEEE  (Volume:1 ,  Issue: 1 )