A 2.5 GHz Compact Wearable Microstrip Patch Antenna for off body Wireless Communication in WBANs

In this work, the design and analysis of wearable stub incorporated circular microstrip patch antenna resonating at 2.5 GHz frequency is proposed, which is flexible and compact. The substrate used for the proposed antenna is Arlon Diclad 1000, having a thickness of 1.6mm, with a dielectric constant of 10.2 and loss tangent 0.002. Arlon AD 1000 is a very flexible dielectric substrate that is suitable for wearable applications. The suggested flexible antenna’s overall dimensions are 35x30x1.6 mm3. Based on the finite element method, the antenna parameters, including return loss, VSWR, gain, directivity, and radiation efficiency, are studied and validated using Ansys High-Frequency Structure Simulator software. The proposed antenna provides 2.5511 dB gain, -14.2876 dB return loss, 66 MHz bandwidth based on |S11| ≤ 10 dB, the directivity of 3.2928 dB, and 84.3 percent radiation efficiency, according to the simulation findings. The suggested antenna’s small size and high flexibility allowing it to be used in Wireless Body Area Network applications.