WIRELESS DEVICE INCLUDING A MULTIBAND ANTENNA SYSTEM

摘要

A wireless handheld or portable device is described including an antenna system (100) capable of operating in a first frequency region and a higher, second frequency region. The antenna system comprises an antenna structure (105), a matching and tuning system (130), and an external input/output (I/O) port (140). The antenna structure comprises at least one radiating element (110) including a connection point (112), a ground plane layer (120) including at least one connection point (121), and at least one internal I/O port (150). At least one radiating element of the antenna structure protrudes beyond the ground plane layer. Said antenna structure features at any of its at least one internal I/O ports when disconnected from the matching and tuning system an input return loss curve having a minimum at a frequency outside the first frequency region of operation of the antenna system. The matching and tuning system modifies the impedance of the antenna structure and provides impedance matching to the antenna system in the first and second regions of operation of the antenna system.