A novel S band dual circularly polarized antenna array for airborne satellite communication applications

A novel S band dual circularly polarized antenna array with 12 elements is presented for airborne satellite communication applications. The antenna array is composed of microstrip patches, 3dB hybrids and dividers. The simulated and measured results show that an impedance bandwidth of 14% (VSWR<;2) is achieved. Radiation patterns with low cross polarization are achieved. The overall size of the array is 2.4λ×1.7λ×0.09λ, which makes the antenna array suitable for airborne satellite communication applications.