Preliminary studies of an offset-fed loop-dipole antenna for all-metal handsets

Conceptual design of an offset-fed folded loop-dipole antenna for all-metal handset covering 800-1050MHz, 1700-2360MHz and 2600-2800MHz is proposed. The antenna has a low-profile and balanced structure comprising a folded loop strip, and it is especially suited for application in mobile phone (designed packaged within the all-metal housing and the ground plane length is 120mm) for multiband operation. The influence of the all-metal housing of the antenna is considered when the proposed antenna is been designing. Design considerations and simulated results of the loop-dipole antenna are presented and discussed.