Design X-circular polarized with slanted rectangular slot by using single port

This technical paper present the design of circular patch with slanted rectangular slot (Design 1 and Design 2) and x-circular polarized with slanted rectangular slot (Design 3) by using single port at frequency 2.4GHz. For design 3, the combination of design 1 or design 2 by using quarter wave matching is introduced. The design simulated using Microwave CST software with dielectric constant dielectric constant, ε_r=4.3 and tan δ=0.019 and thickness of substrate, δ=1.6mm. The simulation results such as return loss, bandwidth, gain, directivity, axial ratio and polarization have been compared.