Quasi-Precise Interval Analysis Method Based on Transmission Coefficient Interpolation for Radome Tolerance Analysis

This work presents a quasi-precise interval analysis (IA) method for radome tolerance analysis, which tackles the precise interval prediction of radome transmission coefficient with complex expressions. Through traversal of errors and interpolation with incident and polarization angles, the precise transmission coefficient interval can be obtained and then combined with the real-imaginary-parts-based IA (IA-RI) method and amplitude-phase-based IA (IA-AP) method for electromagnetic performance prediction. The proposed method is precise in the context of the present complex interval description method. Results compared with the currently best analytical AP method validate the effectiveness of the proposed method. The interpolation-based AP method yields the narrowest EM performance intervals, with 46%–76% width reduction over the analytical one. The interpolation-based RI method reaches a better balance between precision and efficiency, with 20%–54% width reduction and more than 99.9% time reduction.