A Sleeve-Badge Circularly Polarized Textile Antenna

A circularly polarized sleeve-badge antenna is proposed for a 2.45 GHz frequency band. The proposed antenna is small and thin enough to fit within a standard jacket sleeve badge, while the assembly is based on the standard off-the-shelf parts, which enables simple and cost-effective mass production. A wide beamwidth and a 5.6% impedance bandwidth provide practical properties.