Two dielectric resonator antennas are discussed to generate circularly polarized waves in a reflectarray antenna . In this case, two models are discussed here, one is DRA supported on cross slot, while the second is aperture coupled DRA supported on cross strip line coupled to DRA by cross slot. The verification of reflection coefficient phase of cell is satisfied by CST microwave studio and HFSS package. A complete array of 15 x 15 fed by a circular horn tilted by 45 degree was designed and simulated at X-band by full wave package. The simulated results show that the obtained 1.5-dB gain bandwidth and 3-dB axial ratio bandwidth of the reflectarray with aperture coupled DRA can reach as large as 25% and 12.5% |
