Регенеративная система в пассивной радиосенсорной технической диагностике электронных устройств

Abstract

This work is devoted to the problem of processing signal radio profiles with a duration of less than 1 ns. These radio profiles are obtained by registering the electrical component of the near field of electromagnetic radiation induced by the electronic unit of the device using the method of passive radio engineering diagnostics. The reasons for the occurrence of significant errors in the processing of signal radio profiles by modern methods of direct analog-to-digital conversion and parallel conversion of real time are shown, associated with a decrease in the number of effective bits, an increase in sampling irregularity and signal rise time. A method is proposed for reducing the arising errors by switching to the method of stroboscopic scale-to-time transformation using multiple repro duction (regeneration) of a complex signal section by means of the previously presented regenerative system. Numerical modeling of the functioning of the regeneration system together with a stroboscopic time-scale converter was carried out in the study of the area of interest in the signal radio profile in the Simulink environment of the MatLab package. Using the correlation analysis of the reconstructed and the original signal radio profile, the validity of the use of the regenerative system in the processing and recovery of signal radio profiles of subnanosecond duration is shown. An experiment was prepared and carried out using modern high-speed equipment: a real-time oscilloscope and a stroboscopic oscilloscope with a subpicosecond sampling to study the correctness of the applicability of the regeneration method when combining the scale-time transformation and real-time transformation. The result of the stroboscopic scale-to-time transformation in the equivalent time mode with the transfer of the section to the general signal reconstructed in real time is presented. It is concluded that the accuracy of processing the original signal is increased by means of regeneration followed by restoration by methods of stroboscopic scale-time transformation, which allows further analysis of the signal radio profile with the smallest errors. Also, the regeneration system together with the strobe-frame-sampler can be used as a hardware method for conducting passive radiosensor technical diagnostics.