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The measurement of the field radiated from an antenna placed above a finite ground plane experiences the effects of the field scattered by the edges of the ground plane. A new numerical method to remove these effects from measured data is presented here. It resorts to the image theorem and can be used for both near-field and far-field measurements. A simple and effective algorithm has been developed to apply that method to fields described by means of spherical wave expansion. A numerical validation shows the effectiveness of the method.

A NUMERICAL FILTER TO REMOVE THE FIELD SCATTERED BY THE EDGES OF A FINITE GROUND PLANE FROM MEASURED DATA