Printed WWAN/LTE slot antenna for tablet computer application

A printed slot antenna comprising two quarter-wavelength slots of different lengths and a half-wavelength slot for eight-band WWAN/LTE operation in the tablet computer is presented. The two quarter-wavelength slots are open slots or monopole slots, and the half-wavelength slot is aligned in-between the two quarter-wavelength slots. The three slots are excited using a two-strip feedline which is printed on the opposite surface of the printed slots. The proposed three-slot configuration can lead to two wide operating bands, with the lower one covering the 704~960 MHz band and the upper one covering the 1710~2690 MHz band. Good radiation efficiency for frequencies over the operating bands is obtained. The simulated body SAR (specific absorption rate) values of the antenna in the bottom face, landscape and portrait orientations to the flat phantom in the body SAR testing model also meet the limit of 1.6 W/kg for 1-g tissue. Details of the results are presented.