| 摘要 |
An antenna assembly (AA) for an RFID system comprises a main winding (WM) that extends over a volume (VI). The antenna assembly (AA) further comprises an auxiliary winding (WA), which is concentrated at one side of the volume (VI). The auxiliary winding (WA) is electrically coupled to the main winding (WM) and arranged so that these respective windings produce respective magnetic fields of similar orientation in response to a drive signal. The antenna assembly (AA) can be disposed in a storage space (SP) that is delimited by walls of electrically conductive material, such as, for example, a metal cabinet. The antenna assembly (AA) allows reliable RFID operation within the storage space (SP). The volume (VI) over which the main winding (WM) extends is preferably only 2 to 20% smaller than that of the storage space (SP).
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