Investigation of Single Stage λ/4 Transformer Matching Network To The X-Circular Polarized Antenna

Abstract

This technical paper present 2 design of x-circular polarized with slanted rectangular slot microstrip patch antenna. 4 different circular polarized wave is feed by using single port in X-form is at 450, 1350, 2250 and 3150. The combination of 4 patches for design 1 is without using quarter wave impedance matching technique and design 2 refer to the design x-circular polarized with slanted rectangular slot microstrip patch antenna with single stage transformer. The designs are simulated using Computer Simulation Technology (CST) with dielectric constant, εr=4.3, loss tangent, tan δ=0.019 and thickness of substrate, t=1.6mm. The simulation results for ther return loss, bandwidth, gain, directivity and polarization have been compared. The λ/4 transformer matching network can improve the antenna performance especially the gain and efficiency