Combined-type dual-wideband and triple-wideband LTE antennas for the tablet device

Two combined-type tablet device antennas for LTE dual-wideband and LTE triple-wideband operations are presented. For the triple-wideband LTE antenna, it is formed by combining an inverted-F antenna (IFA) to cover the LTE low band (698~960 MHz) and a coupled-fed loop antenna to cover the LTE middle band (1710~2690 MHz) and high band (3400~3800 MHz). Such a triple-wideband LTE antenna occupies a small ground clearance of 10 × 30 mm2 and a thin thickness of 3 mm. For the dual-wideband LTE antenna, it is formed by combining an IFA and a monopole having a capacitive shorting strip, so as to provide two wide operating bands to cover the LTE operation in the 698~960 and 1710~2690 MHz bands. Results of the two combined-type LTE antennas are presented and discussed.