Small embedded LTE/WWAN antenna for a laptop computer

摘要

A small embedded long-term evolution/wireless wide area network (LTE/WWAN) antenna integrated with the keyboard ground plane in a laptop computer is presented. The antenna is installed on a notched region (40 mm × 8 mm) of the keyboard ground plane. This antenna can not only be configured to have a compact configuration but also be designed to excite several resonant modes of the hinge slot between the display ground plane and the keyboard ground plane. The proposed antenna comprises a hook-shaped strip and a shorted strip, which together form a coupled-fed loop that not only has a compact size when printed on a 0.8-mm-thick FR4 substrate 40 mm × 8 mm in size but also provides eight-band LTE/WWAN operation. The proposed antenna can cover LTE/WWAN operation in the 698-960 and 1710-2690 MHz bands. The measured antenna efficiency was approximately 45%-80% in the lower band and approximately 52%-75% in the upper band.