A Quad-band Compact Diversity Antenna for Mobile Handset Devices

A quad-band planar compact diversity antenna for mobile handset devices is presented in this paper. The antenna unit of the proposed antenna is a "paperclip" structure consisted by an inverted L-shaped strip and a C-shape meander branch connected by a metallic via hole. The radiation structure of the proposed antenna is compact, 15.6x25mm(2). Simulated and measured results show that the proposed antenna can operate at 0.915/2.45/3.5/5.8GHz WSNs, WLAN and LTE bands with quasi-monopole radiation patterns. Two diversity antenna geometry are compared and discussed in the overall size of 60mm x 100mm substrate similar like the size of modern mobile handset devices. A low Enveloped Correlation Coefficient(ECC) characteristic are achieved by the optimized diversity design. Together with compact volume, the proposed diversity antenna is a good candidate for mobile handset device applications.