A Y-slot wideband circularly polarized antenna for non-contact health monitoring applications

摘要

The primary object of this paper is to investigate the polarization mismatch effects between transmitter and receiver antennas in noncontact monitoring applications. It is shown that circularly-polarized antennas have better performance compared to similar linearly-polarized ones in the presence of the human body. A novel y-slot wideband CP antenna is proposed. The antenna consists of a u-shaped feed, a y-slot, and a parasitic stub. Simulation results show a bandwidth of 82% (3-7.2 GHz) for VSWR<;2:1 with a 3 dB axial ratio (AR) bandwidth of 33% (4.6-6.4 GHz). The proposed antenna has a low profile with an overall size of 28 mm×28 mm×1.6 mm.