CPW-fed broadband circularly polarized rectangular slot antenna with L-shaped feed line and parasitic elements

摘要

A new coplanner waveguide-fed broadband circularly polarized (CP) rectangular slot antenna is proposed. Circular polarization (CP) is obtained using L-shaped feed line protruded from the signal line and rectangle-shaped parasitic element (PE). The CP bandwidth can be significantly enhanced by placing a strip adjacent to the rectangle-shaped PE. By adjusting the length of the strip, the CP bandwidth is obtained as high as 48.28% (2.2-3.6 GHz) with axial ratio (AR) 3 dB. Impedance bandwidth of 63.97% (1.93-3.745 GHz) with VSWR2 is achieved. The antenna has a small size of 60 x 50 mm(2). (c) 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1788-1794, 2015