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　\lambda),　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.　©　2020　EurAAP.