A Multi-Functional Compact Button Antenna for Wearable Applications

Abstract

A multi-functional button antenna is designed, with dual-band and dual-polarization characteristics. This antenna is a dedicated design for wearable applications. A compact size button is achieved with a diameter of only 19.5 mm (0.29 λ), which optimizes the users' comfort. The proposed antenna works in the 4.5-4.6 unlicensed future 5G communication band, and the 5.1-5.5 GHz WLAN band. Two radiation patterns with orthogonal linear polarizations are obtained in each band. The mutual coupling between the two patterns is below -20 dB. The antenna is prototyped. Simulations and experiments confirm the validity of this novel concept.

A Novel Copper Tape Wideband Wearable Antenna for Wban Application

“…However, transmission line parasitic can significantly degrade performance in practice, especially as the frequency increased. It should be noted that although the design details are not reported, UWB hybrid couplers are commercially available up to 40 GHz [5][6][7][8][9][10][11][12] proposed Designs of a polygon shape microstrip antenna for increasing number of side lengths are studied. A detailed analysis is presented for the variations observed in the first and second order mode resonance frequencies in a polygon shape patch, from triangle to square to pentagon, ending up in a circle.…”