Design of dual-monopole slots antenna integrated with monopole strip for wireless wide area network mobile handset

An internal antenna for penta-band wireless wide area network (WWAN 824-960/1710-2170 MHz) operation in the mobile handset is presented. By integrating two monopole slots with a monopole strip printed on the top portion of the main circuit board, the monopole slots generate their quarter-wavelength slot modes for the antenna´s lower band, whereas the monopole strip can contribute quarter-wavelength resonant modes for the antenna´s upper band. The monopole strip serves as a feed for the monopole slots and also functions as an efficient radiator. In this case, the antenna can provide two wide operating bands (795-1035/1700-2205 MHz) to cover the penta-band WWAN operation.