Miniature low SAR printed monopole antenna for mobile phone

A multiband compact printed monopole antenna is proposed for mobile phone. In this configuration, the antenna comprises a slotted rectangular-shaped radiator, microstrip-fed line, and a slotted ground plane on FR-4 substrate. The total antenna dimensions with ground plane are 78 x 40 x 0.8 mm(3). The measured results show that the proposed antenna has an impedance bandwidth 358.4 MHz (0.60-0.95 GHz, lower band), and 1 GHz (1.7-2.7 GHz, upper band), which can cover GSM 900 MHz, DCS 1800 MHz, PCS 1900 MHz, GSM 1900 MHz, UMTS 2100 MHz, Bluetooth 2400 MHz, WLAN II.b (2400 MHz), and LTE (2300-2400 MHz) bands. The proposed antenna shows very good radiation efficiencies and gain values and near omnidirectional radiation patterns at those frequency bands. Moreover, the proposed antenna produces lower specific absorption rate values in the human head than that of a dipole antenna, helical antenna, and planar inverted-F antenna. (c) 2015 Wiley Periodicals, Inc