Body SAR study of the planar WWAN monopole slot antenna for tablet device application

Abstract

A study on the body SAR of the planar WWAN (wireless wide area network) monopole slot antenna for tablet device application is presented. The monopole slot antenna covers penta‐band WWAN operation in the 824∼960/1710∼2170 MHz bands with low near‐field emission such that its body SAR (specific absorption rate) values for 1‐g tissue in the bottom face, landscape and portrait orientations to the flat phantom meet the limit of 1.6 W/kg for practical applications. Effects of the monopole slot antenna disposed at various possible locations in the tablet device on the body SAR results are also analyzed. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26094

Small‐size WWAN tablet computer antenna with distributed and lumped parallel resonant circuits

“…The display ground has a size of 150 × 200 mm 2 , about the same size as that of a 9.7‐in. tablet computer on the market [20]. The antenna is mounted vertically at the shielding metal wall (size 5 × 200 mm 2 ) along the top edge of the display ground.…”

Uniplanar coupled-fed U-shaped monopole antenna for LTE/WWAN operation in a tablet computer

“…The internal antennas for mobile devices such as handsets, laptop computers and table computers operating at GSM850/900/1800/1900/UMTS (824 ~ 896/880 ~ 960/1710 ~ 1800/1850 ~ 1990/1920 ~ 2170 MHz) bands have been presented [1][2][3][4][5][6][7][8][9]. Owing to the LTE (long term evolution) operation, which is recently introduced to provide much higher data rate than the WWAN operation, mainly includes three operating bands in the LTE700 (698 ~ 787 MHz), LTE2300 (2300 ~ 2400 MHz) and LTE2500 (2500 ~ 2690 MHz).…”

Internal cellular handset antenna with a curved metal pattern for decreased near‐field radiation

“…Hence, from the property of the term $ \nabla (\nabla \cdot \vec A) $ , it can be expected that the abrupt variations of the excited surface currents on the metal pattern of the antenna will cause sharp increase in the near‐field radiation of the antenna. This behavior will lead to increased SAR values [3–8] for the handset with such an antenna embedded therein. To verify this expectation, near‐field radiation characteristics of an internal cellular handset antenna with a curved metal pattern are studied, and obtained results are presented and discussed.…”