Dual-wideband open-slot antennas with two open ends for the LTE metal-framed tablet device

The open-slot antennas are very suitable for the metal-framed tablet device applications. In this article, the open-slot antenna with two open ends and simple slot structure is demonstrated to be promising candidate for achieving dual-wideband LTE operation in the tablet device, such as the smartphone and tablet computer. Two design examples are shown. The first one is a linear open-slot antenna with two open ends for the smartphone application. The second one is a U-shape open-slot antenna for the tablet computer application. Both antennas can cover the 698~960 and 1710~2690 MHz bands for the LTE operation. The operating principles and antenna performances for such open-slot antennas are presented and discussed.