Abstract
This paper proposes a planar printed wideband an- tenna for eight-band LTE/GSM/UMTS WWAN wireless USB don- gle applications. An inductive shorted strip with a chip capaci- tor loaded is employed in order to improve the characteristics of small-size terminal antennas which usually have a narrow band over the LTE700/GSM850/900 (698{960MHz) operation. While the desired upper band is mainly realized by the rectangular radi- ating patch, covering DCS1800/PCS1900/UMTS2100/LTE2300/2500 (1710{2690MHz) band. Easily printed on a 0.8-mm thick FR4 di- electric substrate of size 20£70mm 2 , the proposed antenna structure occupies a compact size of 20£19mm 2 . Then the proposed design can be attached to laptop computer by the USB interface. Good radiation e-ciency and antenna gain for frequencies over the desired operating bands is obtained. Detailed design considerations of the proposed an- tenna are described, and both experimental and simulation results are also presented and discussed.
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