Rapid and accurate prediction method of ultra wide band electromagnetic pulse response of wide-band antenna

Abstract

Disclosed is a rapid and accurate prediction method of the ultra wide band electromagnetic pulse response of a wide-band antenna. The method comprises the following steps of 1) utilizing a wide band antenna field-circuit conversion transmission function to express the relation between an ultra wide band electromagnetic pulse environment and the time domain response, namely, the sensing open-circuit voltage of the output end of the wide-band antenna and obtaining the frequency domain amplitude phase response curve of the wide-band antenna; 2) utilizing a vector fitting method to determine the frequency domain response of the wide band antenna field-circuit conversion transmission function; 3) further obtaining the time domain impact response of the wide band antenna field-circuit conversion transmission function; 4) by computing the time domain impact response of the wide band antenna field-circuit conversion transmission function and the convolution of the time domain expression of the ultra wide band electromagnetic pulse environment, obtaining the time domain response of the output end of the wide-band antenna under the action of ultra wide band electromagnetic pulse. The rapid and accurate prediction method of the ultra wide band electromagnetic pulse response of the wide-band antenna has the advantages of, compared with conventional fall-wave numerical predication methods, omitting computation of antenna response frequency point by frequency point, being capable of computing the time domain response of the output end of the wide-band antenna in one step and accordingly being high in computing speed and accurate in results.

Description

technical field [0001] The patent of the invention belongs to the field of electromagnetic compatibility prediction, and specifically relates to a fast analysis method for wide-band antenna coupling response in an ultra-broadband electromagnetic pulse environment with wide applicability. The time-domain coupling level of broadband antenna in pulsed environment provides design input for electromagnetic pulse protection of broadband system. Background technique [0002] Ultra-broadband electromagnetic pulse refers to a strong electromagnetic pulse with a rising edge time less than 1ns. Due to its extremely fast rising edge time, its spectral energy may be distributed in the range from 10MHz to several GHz, or even exceed 10GHz. Covering the working frequency band of most sensitive equipment at present, the ultra-wideband electromagnetic pulse can generate strong coupling with the antenna of sensitive equipment and enter the RF front-end and cause damage to the equipment. Phys...

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Problems solved by technology

At this stage, prediction and analysis are mainly performed through time-domain full-wave solutions, but there are technical problems such as antenna preparation modeling, high computing resource occupation, and slow computing efficiency, and the physical concept is not clear, so it cannot be used for different ultra-wideband electromagnetic pulse parameters. quick analysis

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