A Compact and Wide Band Dual-Sense Circularly Polarized Flexible Antenna

This work presents a flexible, wide-band, dual-sense, circularly polarised antenna. The Coplanar Waveguide (CPW) is the excitation feeding mechanism utilised for the 36 mm × 25 mm antenna footstep. Using Rogers Ultralam 3850 substrate material ensures flexibility. Left-Hand Circular-Polarization (LHCP) and Right-Hand Circular-Polarization (RHCP) are achieved by stimulating a triangle-shaped monopole by an asymmetric CPW ground in the general sense of dilatation the breadth and lengthening of one ground plane, with respect to the second one. The antenna has an ISM-band resonance at 5.8 GHz, a wide -10 dB bandwidth of 3.24 GHz, a realized gain equals 2.4 dBi, boresight axial ratio (AR) equals 0.88 dB, and a wide 3 dB-AR bandwidth equals 4.11 GHz. These characteristics provide for flexibility in the antenna's design for CP-related wearable applications.