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A Dual-band Smartwatch Antenna with Polarization Diversity

This paper proposes a dual-port dual-band smartwatch antenna with polarization diversity. The antenna is located on the frame of smartwatches and realized by composite right/left handed-transmission line (CRLH-TL). The overall model has a cylindrical shape, and the diameter and the height of this smartwatch antenna is 33.6 mm, and 6.8 mm, respectively, which is can be integrated in the framework of most smartwatches. The two ports can excite orthometric current distributions to realize the polarization diversity. The CRLH-TL is loaded on the annular ring, to realize the 2.4/5.8 GHz dual-band operation. A metallic plate is located at the back of the proposed smartwatch antenna to simulate the backed shell of smartwatch. Besides, a wrist model is considered in analyses to evaluate the on-body performance of the proposed antenna.