A Dual-polarized Improved Gaussian Profiled Corrugated Horn Antenna with Low Cross-Polarization

A dual-polarized Gaussian profiled corrugated horn antenna is designed, which has the characteristic of low cross-polarization. By introducing an improved corrugation profile, a very low cross-polarization level is obtained. The corrugation’s characteristic, the Gaussian profile parameter, the antenna length and the other structure parameters are properly chosen to achieve the low cross-polarization performance. The simulation results show that, in the working band (16-18GHz), the cross-polarization level is below -38dB (below -40dB at 17GHz), the VSWR of both feed ports is less than 2, the isolation between the two ports is greater than 40dB and the gain is greater than 20dBi.