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A compact multiband internal antenna that is composed of a coupled structure with an inverted-L patch and two step-shape forky strips is designed. The antenna has two operating bandwidths 698~1100 MHz and 1570~2910 MHz to cover LTE/GSM/UMTS. Therefore, the proposed antenna can support current all 2G/3G/4G wireless communication network services. The limited volume of the antenna is only 40 × 12.5...