Abstract
By introducing dual parasitic shorted strips and a loop strip, this study proposes a small-size antenna with multi-band WWAN/LTE operation in a mobile phone. The obtained impedance bandwidths across LTE and WWAN operating bands approach 318 MHz and 1738 MHz, respectively. The measured peak gains and antenna efficiencies are approximately 1.5 / 3.2 dBi and 81 / 90 % for the LTE/WWAN bands, respectively.
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