An Efficient OTA Cross-Polarization Performance Estimation Method for 5G mm-Wave Large-scale Arrays

In this paper, an efficient over-the-air (OTA) cross-polarization performance estimation method is proposed for the fifth-generation (5G) millimeter-wave (mm-Wave) large-scale arrays. A new transformation and revision algorithm is developed to achieve high precision and little time consumption in the cross-polarization performance estimation of the antenna array under the midfield (MF) condition. Detailed design, analysis, and experimental results using a 64-element phased array in the 26GHz band are provided in this paper. The proposed method is proved to be extraordinarily cost-effective and time-saving with comparable precision to the far-field test method.