Frequency reconfigurable antenna using a PIN diode for mobile handset application

摘要

In this paper, a reconfigurable antenna for WWAN (Wireless Wide Area Network) mobile handset application is proposed. The proposed antenna consists of a conventional PIFA, a parasitic line, a PIN diode, and a bias line. When PIN diode is the on-state, the measured results show that the −6 dB reflection coefficient bandwidths are 8.15% (824–894 MHz) at low band and 34.12% (1580–2230 MHz) at high band. Therefore, the proposed antenna covers GSM850, GSM1800, GSM1900 and UMTS. When PIN diode is off-state, the measured results show that the −6 dB reflection coefficient bandwidth is 12.15% (850–960 MHz), which covers GSM900 band.