The present invention relates to an expansion card for an electronic device, preferably a card-like wireless communication device, which card (CP) comprises a cover surface (1) and a bottom surface (2) as well as an outer surface (3) edging said card (CP), and which card (CP) further comprises at least an antenna structure. Said antenna structure (ANT) is arranged as a flexible strip (4) attaching to said card (CP) and extending at least partly outside said outer surface (3). According to a preferred embodiment of the invention, the strip is also arranged for pulling out said card (CP) from an expansion card interface slot. According to another advantageous embodiment of the invention, said strip (4) is arranged to be folded against said card (CP).