Wideband planar monopole antenna for LTE, GSM, Bluetooth, WiMAX, DCS, PCS, and GPS mobile terminals

A simple planar antenna of high gain for long term evolution (LTE), global system for mobile communications (GSM), Bluetooth, worldwide interoperability for microwave access (WiMAX), digital cellular services (DCS), personal communication services (PCS), wireless local area network (WLAN), and global positioning system (GPS) mobile terminals is presented. The antenna has wide -6 dB reflection coefficient bandwidth of 2.17 GHz (1.33 - 3.5 GHz). The antenna has a compact size of 44.9 mm ×35.5 mm × 0.87 mm placed one side of the substrate of dimension 35.5 mm × 75.5 mm. The antenna has high gain of 3.85 dBi at 2.7 GHz, maximum directivity is 5.04 dBi at 2.7 GHz and total efficiency of the antenna varies between 61% and 95% within the wide impedance bandwidth. In addition, the antenna gain and efficiency is almost constant in individual operating band of operation. Dimensions of the antenna are optimized for wide impedance band. Antenna radiation patterns are presented at 1.5, 2, 2.5, and 3 GHz.