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A planar inverted‐F antenna (PIFA) is presented, which has a dual‐resonance feed structure that enhances impedance bandwidth considerably. The proposed antenna fully covers LTE13/GSM850/GSM900 without significant modification of the antenna element fabricated in a small ground clearance. The antenna's impedance bandwidth under VSWR = 3:1 is 733–974 MHz, with a good realised efficiency.
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Lee et al. (2013) studied this question.
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