Screen-Printed Dual-Band and Dual-Circularly Polarized Textile Antenna for Wearable Applications

摘要

A dual-band textile antenna with dual circular polarization (CP) is designed for wearable devices at the 3.5-GHz WiMAX and 5.8-GHz industrial, scientific, and medical bands. The proposed antenna is made by textile material, making the antenna flexible and conformable. The dual CPs are enabled by placing a linearly polarized monopole on a polarization rotation artificial magnetic conductor, and the mechanism for linear and circular polarizations of the antenna is analyzed in theory. The simulated results on phantom show that the –10-dB impedance bandwidths of the two bands are 12.5% and 11.6% with the 3-dB axial ratio bandwidths of 0.9% and 6.1%, and with the peak gains of 6.0 and 5.8 dBi at the dual bands. Notably, a flexible prototype with the dimensions of 62 × 62 × 4 mm^{3 was fabricated by using screen printing. The measured results in different scenarios indicate that the proposed antenna has good robustness.}