Internal antenna for multiband mobile handset applications

Design of a multiband internal antenna for mobile handset applications is presented. Two antenna elements are formed on top and bottom of the common substrate and connected by a metallic pin. The resonant frequency of each element is almost independent. Matching the impedance with the slit, a wide bandwidth is achieved so that the operating frequency bands include GSM (880-960 MHz), GPS (1575 MHz), DCS (1710-1880 MHz), USPCS (1850-1990 MHz), and UMTS (1885-2200 MHz). Radiation patterns are omni-directional for all frequency bands. Details of the proposed antenna as well as the measured results are presented.