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A frame antenna based on the inverted-F antenna (IFA) structure for the LTE (long term evolution) metal-casing smartphone is presented. The antenna uses a frame section along the short edge of the metal casing as the IFA's radiating strip. There are no gaps required at the two side edges of the smartphone. The frame section is connected to a feed circuit board (FCB) to achieve wider bandwidth. With...
Small-size circuit-defined tablet device antennas for LTE dual-wideband operation are presented. Two cases with dual-feed and single-feed designs are discussed. For the dual-feed design, the antenna is formed by a simple folded metal plate excited by a low-band feed (direct feed with matching network) and a high-band feed (gap-coupled feed with matching network) for LTE operation in the 698∼960 and...
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