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Abstract A small circularly polarized multiple‐input multiple‐output (MIMO) antenna is demonstrated here as a biometric gadget for consumers. In this article, the authors introduce a structure for antennas that consists of four essential parts that are orthogonally arranged opposite each other. The transmitted signal has around 10 db wideband response at 2.22 GHz, referred to as fractional band‐widths (FBW) which is 91.08 achieved when operated in free space. Also included is a 10‐db transmitter with a 2.44‐GHz band‐width, a FBW of 92.56%, and it can be used on wearables on human bodies. The authors have therefore calculated frequency ranges that cover the most important and unlicensed free of cost open‐source band‐width of 2.4 to 2.48 GHz that is also known as ISM band (industrial, scientific, and medical) range. When operated in free space and in human body proximity of 5 MM, the antenna also operates at 1.3 GHz, which is approximately 54.16% fractional band‐width, as well as 1.04 GHz, which is approximately 43.33% fractional band‐width. An antenna that is finalized in free‐space (or within 5 mm of a human body) has an optimum envelop correlation coefficient (ECC) beneath 0.22 (0.24), and an optimal gain of about 3 dB.