A Compact Planar Inverted-F Antenna for Octa-band Operations of Smart Handsets

This paper applies planar inverted-F antenna (PIFA) to design a smart handset antenna in accordance with octa-band operations, as GSM 850 (824-894 MHz), GSM 900 (880-960 MHz), GSM 1800/1900, DCS 1800 (1710-1880 MHz), PCS 1900 (1850-1990 MHz), UMTS (1920-2170 MHz), IEEE 802.11b WLAN (2400-2484 MHz) and LTE (700 MHz/2300 MHz/2600 MHz) band operations for S-11 <= -6 dB. The entire antenna is 75 x 22 x 5.8 mm(3) with one-quarter wavelength design of hub. With the inter-coupling between dual branch circuit radiation and multiple branch circuit radiation, the wideband for GSM 1800/1900, DCS, PCS, UMTS, IEEE 802.11b WLAN and LTE 700/2300/2600 is generated. When integrating with mobiles, the designed ground plane area is also taken into consideration. In this case, the ground plane area can be increased in accordance to the system motherboard.