Resumen de Internal PIFAs for UMTS/WLAN/WiMAX multi-network operation for a USB dongle
Two kinds of internal planar inverted-F antennas (PIFAs) suitable for application in a USB dongle for UMTS/WLAN/WiMAX multi-network operation are presented. The first one is a hybrid PIFA consisting of a metal-plate portion and a printed portion, while the second one is a printed PIFA. Both the hybrid and printed PIFAs are suitable to be mounted at the top no-ground region of the USB dongle as internal antennas and can generate two wide bandwidths at about 2.3 and 5.5 GHz to cover the UMTS (1920–2170 MHz), WLAN (2400–2484/5150–5350/5725–5825 MHz) and WiMAX (2500–2690/5150–5850 MHz) bands for seamless wireless network access. Detailed designs of the two PIFAs are described, and results of their impedance and radiation characteristics are presented and discussed.
