Power Pattern Tolerance Analysis of Radome With the Material Property Error Based on Interval Arithmetic

For the problem that the material property error of composite radome will impact the electromagnetic (EM) performance of the antenna-radome system, a novel analytic approach for the research of the effect on average power pattern of the antenna-radome system with the material property error (including permittivity and loss tangent) in the composite radome based on interval arithmetic is proposed. The material property errors of the radome's composite material are modeled as interval parameters. The relationship of the material property error interval, the power pattern interval, and some main EM characters (sidelobe level, peak power, and half-power beamwidth) intervals are researched by interval analysis (IA). Some valuable conclusions are revealed by four kinds of numerical examples. The property errors of different composite materials (skin and core) and components (joint and panel) of radomes are taken into account. The proposed IA-based approach has good prospect to be applied in antenna-radome engineering.