Design of a U-shaped circularly polarized wearable antenna with DGS on a fabric substrate for WLAN and C-band applications

摘要

A circularly polarized wearable textile antenna for use in WLAN (5.15-5.825 GHz), HIPER LAN/2 (5.15-5.350 GHz, 5.470-5.725 GHz) and C-band applications is presented. The wearable antenna was formed on jeans fabric (as substrate) and is simple in design. The proposed design includes a U-shaped radiating patch with a modified ground. The microstrip linefeed technique is used to excite the antenna. The impedance bandwidth of the antenna is observed to be 60.86%, between 4.8 and 9 GHz. The 3-dB axial ratio bandwidth is found to be 20.08% between 5.1-5.8 and 7.2-7.8 GHz. A peak gain of 5.19 dBi is measured. The effect of the antenna parameters is also analyzed through a parametric study. To verify the operation of the presented design, the antenna was fabricated and tested using a vector network analyzer. Comparison of the simulated and measured results revealed good agreement.