In recent times, the study of flexible wireless devices has attracted ample attention in the fields of biomedicine and healthcare. Biomedical systems are becoming more popular and employed to find harmful elements within human bodies. A portable biomedical device makes use of a contacting or non-contacting way to find tumours inside the human body. In view of this, a compact twoslot hexagonal shape flexible wideband microstrip antenna for healthcare application is presented. The proposed antenna is designed using a low-cost, light-weight, and broadly accessible flexible foam material. The slots incorporated into the geometry have enriched the percentage bandwidth of 106.67% with a total gain of 4.67 dBi. The flexible wideband antenna of dimension 28 × 26 × 2 mm 3 is fabricated using copper foil. The designed and fabricated antenna operates over the frequency of 2.94 to 9.66 GHz resulting in three different resonating frequencies; 3.8 GHz, 6.7 GHz, and 9.1 GHz. The flexible antenna is tested under different bending conditions and obtains good performance to substantiate flexibility. The Specific Absorption Rate (SAR) analysis is also performed over a three-layer tissue equivalent body model and observes a maximum SAR value of 1.9 W/kg less than the safety limit of 2 W/kg for 10 gm of tissue. A good agreement is observed between the simulated and measured results of the proposed antenna for free space and human proximity.

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Remote surveillance of the elderly and others with health difficulties is becoming increasingly important in these epidemic days. To address these issues, low-cost, lightweight, and portable wearable devices are in huge demand. This paper realizes the design and analysis of a flexible ultra-wideband (UWB) antenna for healthcare applications. The proposed hexagonal microstrip antenna encompasses two cuts on the top left and right side of the hexagon which looks like a flower bud. The antenna is fabricated using a flexible foam substrate with a dielectric constant of 1.07 and has a dimension of $$38 \times 30 \times 1.7\,{\text{mm}}^{3}$$ 38 × 30 × 1.7 mm 3 . With a unique patch shape and corner cut in the partial ground, the present design strives to optimize the antenna structure to accommodate UWB (3.1 to 10.6 GHz) operating spectrum from 2.6 to 11.3 GHz. The proposed antenna has achieved an FBW of 125.17% with a total gain of 5.24 dB. The antenna is also evaluated on the line of bending and SAR over a tissue of 1 g and 10 g. The antenna operated admirably, with an average SAR value below the safety limits of 1.6 W/kg and 2 W/kg for the tissues, respectively.

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