Design of a circularly polarized conformal microstrip antenna with CPW-fed

Aiming at the advantages of conformal antenna, a circularly polarized conformal microstrip antenna with coplanar waveguide fed is presented. The performance of conformal and non-conformal antenna is compared, and the influence of antenna carrier´s radius to the antenna´s performance is analyzed on condition that the antenna´s dimension is unchangeable. The measured and simulated results show that when carrier´s radius is large, return loss of the conformal antenna changes very little while axial ratio bandwidth and gain decreases; when the antenna carrier´s radius decreases, the resonant frequency increases while axial ratio become worse and gain decreases. The study results could provide a technical support for the design of conformal antenna.