A compact small-size coupled-fed antenna composed of an inverted L-shaped feeding strip and a shorting strip with double\nbranches for the WWAN/LTE bands operation in the internal smartphone application is presented. With the help of a novel\ndistributed LC resonant circuit, the proposed antenna can not only realize the miniaturization (15 Ã?â?? 28 Ã?â?? 4mm3) and multiband\nto cover 2G/3G/4G bands but also be tuned and optimized easily. The measured bandwidth with 3 : 1 VSWR is 163MHz (804ââ?¬â??\n967MHz) at the low-band and 1615MHz (1665ââ?¬â??3280MHz) at the high-band.What is more, the lowest measured efficiency in the\nwhole frequency band is more than 52% for practical applications.The operating principles and main parameters are detailed below.\nAnd successful simulation, fabrication, and measurement of the proposed antenna are shown in this paper.
Loading....