Ultra -small cubic folded strip antenna for handset devices

A ultra-small 3 dimensional folded strip antenna is proposed for handset devices. The volume of the antenna is very small compared to traditional PIFA design. The wrapping or bending of the wire (or strip) controls the radiation patterns and enhances the antenna bandwidth. The performance of the three dimensional strip antennas is much better than that of a PIFA with the same maximum size. Because of the small size, the proposed three dimensional monopole antennas may be deployed in a handset as antenna elements to form a multiple antenna system, such as a smart antenna array or a multi-input and multi-output (MIMO) system.