A Simple Multi-Broadband Planar Antenna for LTE/GSM/UMTS and WLAN/WiMAX Mobile Handset Applications

A simple compact low-profile multi-broadband planar antenna is proposed in this paper for LTE/GSM/UMTS and WLAN/WiMAX mobile handset applications. The proposed antenna covers multiple broad frequency bands including LTE700, GSM850, GSM900, DCS/PCS/UMTS, WLAN/WiMAX, LTE2300/2500, and LTE42/43/46. It consists of a C-shaped and U-shaped monopole on one side of a thin dielectric substrate coupled to an F-shaped strip on the other side without any lumped elements. The antenna occupies a tiny size of 15 mm
$\times68$
mm
$\times0.8$
mm, which makes it suitable for the popular ultra-thin smartphone applications. The antenna characteristics such as S-parameter, efficiency, peak gain, and radiation patterns are simulated by HFSS. The measured and simulated results show an excellent agreement. For more practical conditions, the antenna is stalled in a plastic housing to analyze the radiation performance. In addition, its specific absorption rate is simulated and studied by CST as well.