This research presents the design of a novel pentaband planar antenna for wireless USB dongle applications. The main radiator is comprised of a circular hook-shaped patch and a monopole stub to achieve dual-wideband operation. This novel pentaband antenna measures only 10 × 49.5 × 0.8 mm³. The measured 10dB return loss bandwidths of the fabricated antenna are 26.2% (2.29-2.98GHz) and 21.5% (5.12-6.35GHz), thereby supporting WiBro, Bluetooth, WLAN, WiMAX, and S-DMB (Satellite Digital Multimedia Broadcast) services. The gain and radiation efficiency of the antenna are also discussed.