Multi-Band Flexible UWB Antenna for Flexible Electronics and Biomedical Applications

Abstract This article, proposes a flexible ultra-wide band (UWB) antenna for wearable electronics and biomedical applications. The antenna presented for this work is fabricated on kapton polyimide substrate and the operating frequency band ranges from 2.4GHz to 7.1GHz. The proposed antenna has elliptical radiating element and achieves improved impedance matching characteristics through coplanar waveguide (CPW) fed. A detailed study on choice of substrate is performed and the kapton substrate make the antenna less susceptible for degradation in antenna performance that arises due to bending effects. The measurement and simulated results of the fabricated antenna shows good degree of agreement. The return loss performance of the proposed antenna is greater than − 10dB in all the operating bands with improved gain and directivity. The flexible nature with multiple frequency band of operation and good bending performance makes the proposed antenna appropriate for wearable electronic and biomedical applications.