Radiation characteristics of array antennas for mobile handsets

In this paper, the radiation characteristics of array antennas affected by the element configuration, the size of the ground plate are studied by using the FDTD method. The scan patterns for several arrays are investigated in details in order to determine which configuration is more suitable to the array antenna for mobile handset. Furthermore, the XPD in the scan plane is calculated to understand the scan properties of the arrays. Finally, the effect of the ground size on the radiation pattern of array antenna is investigated in order to decide the optimum size of the ground plate for the beam control of the arrays.