A METHOD OF DESIGNING WEIGHT VECTORS FOR A DUAL BEAM ANTENNA WITH ORTHOGONAL POLARIZATIONS

摘要

The present invention relates to a method of generating two beams, having orthogonal polarizations, covering a selected area using an antenna 20; 30 comprising multiple dual-polarized array elements 11; 31. Each dual-polarized array element having a first phase centre 18; 28A associated with a first polarization and a second phase centre 18; 28B associated with a second polarization, orthogonal to said first polarization, being symmetrically arranged in a first direction 12 in relation to a symmetry line 22; 32 perpendicular to said first direction 12. The method comprising: designing a first weight matrix having a first non-zero weight vector for the first polarization and a second non-zero weight vector for the second polarization, calculating a second weight matrix based on the weight vectors of the first weight matrix, and applying the first and second weight matrix to the dual-polarized array elements to generate a second beam covering the selected area.