Method and device for coupling cancellation of closely...

H - Electricity – 01 – Q

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H01Q 1/52 (2006.01) H01Q 21/28 (2006.01)

Patent

CA 2649914

The present invention relates to an antenna system (15) comprising at least two antenna radiating elements (RE1, RE2,... REN) and respective reference ports (R1, R2,... RN)1 the ports being defined by a symmetrical antenna scattering NxN matrix (S). The system (15) further comprises a compensating network (11 ) connected to the reference ports (R1, R2,... RN). The compensating network (11 ) is arranged for counteracting coupling between the antenna radiating elements (A1, A2... AN). The compensating network (11 ) is defined by a symmetrical compensating scattering 2Nx2N matrix (Sc) comprising four NxN blocks, the two blocks on the main diagonal containing all zeros and the other two blocks of the other diagonal containing a unitary NxN matrix (V) and its transpose (Vt). The product between the unitary matrix (V), the scattering NxN matrix (S) and the transpose (Vt) of the unitary matrix (V) equals an NxN matrix (s) which essentially is a diagonal matrix. The present invention also relates to a method for calculating a compensating scattering 2Nx2N matrix (Sc) for a compensating network (11 ) for an antenna system according to the above, and also to a compensating network (11 ) for an antenna system according to the above.

La présente invention concerne un système d'antennes (15) comprenant au moins deux éléments rayonnants d'antenne (RE1, RE2,... REN) et des ports de référence respectifs (R1, R2,... RN), les ports étant définis par une matrice NxN de diffusion d'antenne symétrique (S). Le système (15) comprend en outre un réseau de compensation (11) connecté aux ports de référence (R1, R2,... RN). Le réseau de compensation (11) est agencé pour neutraliser le couplage entre les éléments rayonnants d'antenne (A1, A2... AN). Le réseau de compensation (11) est défini par une matrice 2Nx2N de diffusion de compensation symétrique (Sc) comprenant quatre blocs NxN, les deux blocs sur la diagonale principale contenant tous zéro et les deux autres blocs de l'autre diagonale contenant une matrice NxN unitaire (V) et sa transposée (Vt). Le produit entre la matrice unitaire (V), la matrice NxN de diffusion (S) et la transposée (Vt) de la matrice unitaire (V) est égal à une matrice NxN (s) qui est sensiblement une matrice diagonale. La présente invention concerne également un procédé pour calculer une matrice 2Nx2N de diffusion de compensation (Sc) pour un réseau de compensation (11) destiné à un système d'antennes du type décrit ci-avant, et un réseau de compensation (11) pour un tel système d'antennes.

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