Internal nine-band antenna for WWAN/LTE mobile handsets

An internal mobile handset antenna capable of covering nine mobile communication bands is presented. The proposed design generates five resonant modes covering nine bands of the wireless standards, LTE700 / GSM850 /GSM900 / GPS (1575.42 L1 band) / GSM1800 /GSM1900 / UMTS / LTE2300 / LTE2500. The antenna consists of asymmetric T-shape monopole that couple feeds loop strip shorted to the ground plane. In comparison with existing antennas a wide impedance bandwidth (BW) for the proposed structure is achieved. This paper discusses details of the proposed antenna parameters, operating principle and performance.