Antenna high-altitude electromagnetic pulse (HEMP) coupling response performance statistic method based on polynomial chaos expansion

Abstract

The invention provides an antenna high-altitude electromagnetic pulse (HEMP) coupling response performance statistic method based on polynomial chaos expansion, which has high precision of statistic result, excellent computation efficiency and meets requirements on related profession evaluation work well. The method includes the steps of (1), according to the antenna structure, building an antennaHEMP coupling response model through a corresponding electromagnetic field scattering algorithm; (2), performing uniform conversion as needed according to uncertainty variable set by users and its statistical property distribution pattern, and subjecting coupled random response to the polynomial chaos expansion by using the corresponding polynomial basis; (3), according to types of different polynomials, acquiring coefficients of the different polynomials through Gauss integral in corresponding manners so as to obtain the analytical expression of the antenna HEMP coupling response; (4), deducing to obtain statistical characteristic parameter of the antenna HEMP coupling response and performing the Monte Carlo method to obtain a probability density function and a cumulative probability distribution function.

Description

technical field [0001] The invention relates to a statistical analysis method for the coupling response performance of high-altitude electromagnetic pulse antennas, which is an important part of the effect evaluation of high-altitude electromagnetic pulse (HEMP) wireless communication equipment and the design of electromagnetic pulse protection for wireless communication equipment. It can also play an important role in the fields of communication anti-jamming and electromagnetic compatibility. Background technique [0002] The high-altitude electromagnetic pulse environment has the characteristics of large field strength amplitude, high electromagnetic energy, and wide irradiation area. All communication antennas installed outdoors within the coverage area will be excited to generate a certain coupling current, and the electromagnetic energy will flow along the antenna port, The radio frequency cable enters the interior of the communication equipment, causing damage to the c...

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Problems solved by technology

[0004] Traditional methods usually use Monte Carlo numerical simulation to obtain the uncertainty of the antenna coupling response due to these uncertain factors. However, as the number of uncertain factors increases, the calculation amount also increases rapidly. It is necessary to find an efficient The performance index statistical method improves the efficiency of effect evaluation

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