Study on microstrip x-linear polarized and x-circular polarized antenna

Abstract

This paper present an x-linear polarized microstrip patch antenna and x-circular polarized microstrip patch antenna using single port in X-form at 45°, 135°, 225° and 315°. Combinations of 4 patches using quarter wave impedance matching technique have been used to design x-linear polarized microstrip patch antenna and x-circular polarized microstrip patch antenna. The proposed designs were simulated using Computer Simulation Technology (CST) with dielectric constant, ϵ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">r</sub> =4.3, tan δ=0.019 and thickness of substrate, t=1.6mm. The associated simulation and measurement results such as return loss, bandwidth, gain, directivity and polarization have been compared and analyzed. Both antennas have gain between 5dB to 7dB.