Abstract:
A broadband of circularly polarized (CP) patch antenna with high gain characteristic has been presented inthis paper. Each element used is a double-side printed dipole. In order to improve axial ratio bandwidth, wideband 90°hybrids are used as feeding network. Then, a planer array with 2×3 elements is fabricated, The feeding network is located onthe lower side of the substrate for compacting the size.6 array elements are used in a 2×3 configuration to achieve amaximum gain target of 14 dBi. However, it will enlarge the overall size of the antenna. The feeding network is located onthe lower side of the substrate for compacting the size. This antenna achieve a maximum gain of 14 dBi, and it can possessesan impedance (VSWR<2) bandwidth of 64%, and axial ratio (AR<3dB) bandwidth of 54.5%.