Square Fractal Ring Loaded CPW-Fed Circular Polarized Antenna

The design of a printed monopole antenna loaded with square-ring for circular polarization (CP) is presented. CPW feeding is used to compact the antenna size and overcome the high impedance problem. Enhancement of axial ratio bandwidth is obtained by optimizing the length of the driven monopole antenna. The square-ring microstrip load is the parasitic element which is a compact variation of square microstrip. The multi-band microstrip antenna and the reduction in the whole antenna size are realized by applying fractals to the two opposite sides of the ring. Here, the multi-band frequency response of the fractal ring loaded monopole antenna is studied using HESS software. Detailed design results from parametric simulations are presented and parameters study including the width of the parasitic ring element and lengths of feeding line and radiating patch are involved.