The Effects of Mutual Coupling Using a Linear Array of Thin Dipoles of Finite Length
Paper i proceeding, 1998

The effects of mutual coupling on the direction finding accuracy of a linear array of dipole elements are studied. An approximative expression of the measured voltages when a plane wave is incident upon the array is derived using mutual impedances. The direction finding accuracy is then investigated by calculating the Cramer-Rao lower bound. It is found that a known coupling does not affect the estimation performance much. In the case of an unknown coupling, the estimation procedure can be simplified by using only a few off-diagonal elements of the coupling matrix. Depending on how many parameters that are included, the RMS error can actually be smaller than the CRB for the case when all off-diagonals are estimated.


Thomas Svantesson

Chalmers, Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Proc. 8th IEEE Signal Processing Workshop On Statistical Signal and Array Processing, Portland, USA



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