ELECTRONIC ARTICLE SURVEILLANCE ANTENNA COILS WITH VARIABLE WIND_GEOMETRY

摘要

An EAS antenna (1) having uniform antenna thickness along the antenna height is provided. The antenna contains at least two overlapping coils (2) where the individual coil cross-section are variable with respect to the circumference. If the individual coil thickness is halved at the overlap (8), the antenna will have uniform thickness along the antenna height. This is accomplished by reducing the number of wire turns per layer along one or more sections of the coil, and simultaneously increasing the number of wire layers on the same sections.