Dual-feed ultra-compact reconfigurable handset antenna for penta-band operation

In the past two decades, antenna engineers have achieved impressive reductions in the size of mobile phone antennas, although physical constraints have essentially limited such reductions [1]. The design challenge posed by handset antennas is becoming more critical as networks evolve to offer a wider range of services, such as video telephony, web browsing, navigation services, entertainment etc. The increasing number of different functionalities in the mobile terminal puts great pressure on the available space for antennas, while handset designers expect that antennas can be operated successfully in close proximity to components such as cameras, flash units, loudspeakers, batteries and other hardware.