Abstract: An dual-band antenna (100) used in a portable electronic device includes a first antenna unit (10) configured for receiving and/or sending wireless signals in low frequency bands, a second antenna unit (20) configured for receiving and/or sending wireless signals in high frequency bands; a feed unit (30) and a grounding unit (40). The first antenna unit, the second antenna unit and the feed unit are all connected to the grounding unit. A portion of the first antenna unit is positioned between the second antenna unit and the grounding unit. The first antenna unit and the second antenna unit are respectively positioned in different parallel planes.

Abstract: A multifunctional ultra wideband wireless transmission system having a base station and an ultra wideband wireless transceiver, wherein the base station having a means of wireless ultra wideband transmission provides a plurality of communication interfaces connecting to a plurality of peripheral devices of various interfaces, for example but not limited to: microphone, keyboard, mouse, CD/DVD ROM, printer, etc. The ultra wideband wireless transceiver is connected to a host for UWB signal transmission so that the ultra wideband interface can be used between the host and base station to transmit data or control instructions for control operations of peripheral devices. A functional keypad is disposed on the chassis of the base station. By pressing keys, the base station can operate connected peripheral devices.