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A small-size reconfigurable loop antenna for mobile phone applications with a compact volume of $55 \times 5 \times 3$ mm3 is proposed. In addition to the traditional three loop antenna modes, namely, 0.5-$\lambda $ , 1-$\lambda $ , and 1.5-$\lambda $ modes, the proposed loop antenna also generates another 2-$\lambda $ mode. To cover more operating bands with such compact antenna volume, the...
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