| Fuze is a control system that ensures the safe use of weapons and ammunition and achieves the best damage effect,including functional modules such as data collection,logical judgment,and decision-making.With the gradual entry of high-power microwave weapons into modern warfare,the electromagnetic environment in the battlefield is becoming increasingly complex,and the battlefield viability of fuses has been severely challenged.Experimental methods are often used to study the electromagnetic pulse effects of fuzes,which have high costs,harsh conditions,limited experimental data,and uncertainty in the analysis results;In addition,research has mostly focused on the "front door" coupling effect,and the research on the "rear door" coupling effect is not sufficient.In response to the above issues,this paper takes a certain Ka band millimeter wave fuze as the research object,and studies the "back door" coupling effect of radio fuzes under high-power microwave irradiation from the perspectives of spatial electric field coupling and cable coupling.Based on norm calculation,a quantitative evaluation and analysis of high-power microwave effects is carried out to provide support for the design of high-power microwave protection for fuzes.The main innovation points and main work content of this article are as follows:(1)Based on electromagnetic simulation calculations,the analysis of the electric field coupling effect of millimeter wave fuzes under high power microwave irradiation was carried out.Due to many factors affecting electric field coupling,based on the control variable method,the incoming wave direction and polarization direction of high-power microwave,as well as the influence of characteristic parameters of high-power microwave on electric field coupling of millimeter wave fuzes,are studied;According to the most severe electric field coupling situation,the response characteristics of millimeter wave fuze electric field coupling and the shielding effectiveness of fuze shell were analyzed,and the differences in electric field coupling in different regions of the fuze cavity were analyzed;Based on norm calculation,the electric field coupling efficiency of millimeter wave fuzes is studied,and the similarities and differences of electric field coupling between high-power microwave and fuzes with different parameters are compared.(2)Based on the method of field circuit joint simulation,the coupling effect analysis of millimeter wave fuse cable under high power microwave irradiation was carried out.Establish a simplified simulation model for cable coupling,and obtain the cable coupling law by changing the characteristic parameters of the excitation source,irradiation direction,cable parameters,and cable class.In order to simulate the uncertainty of cable coupling in practical scenarios,the statistical law of the electromagnetic norm of cable coupling under the combined action of multiple factors was studied,and the most severe case of coupling was obtained.Using the parameter combinations of influencing factors under the most severe coupling situation,simulate the cable model constructed according to the actual routing method,and obtain the cable port response waveform;The electromagnetic stress characterization method based on norm characteristics was used to quantitatively evaluate the cable coupling effect of the fuze.(3)Analysis of electromagnetic pulse effects of circuit modules under high-power microwave irradiation.The cable coupling response waveform obtained from field circuit joint simulation is used as an incentive for circuit simulation.Based on circuit simulation,the response waveform of the sensitive device/chip port in the circuit is obtained.Norm feature extraction is performed on the waveform to obtain the integrated electromagnetic stress vector of the device/chip port,achieving a quantitative evaluation of the electromagnetic pulse damage condition of the circuit module,and then judging the damage condition of the sensitive device/chip from the physical layer. |
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