Method for automatically calibrating the field intensity distribution characteristics of electromagnetic reverberation chamber

Abstract

The invention discloses a method for calibrating the field intensity distribution characteristics of an electromagnetic reverberation chamber. The field intensity of an electromagnetic reverberation chamber can be tested by eight field intensity probes at the same time to acquire the field intensity distribution characteristics. The precision is high, and the speed is high. Spatial field intensity sensors are used to sense spatial 100MHz-18GHz radio-frequency microwave electromagnetic field signals and convert the radio-frequency microwave signals into direct-current signals. The eight channels of signals are transmitted by optical fibers to a data receiving unit after data processing end encoding is carried out and the direct-current signals pass through an electro-optical converter. The field intensity distribution characteristics of the electromagnetic reverberation chamber are calculated and processed through a central processing unit. The method is disclosed to realize accurate measurement of the distribution characteristics of a spatial broadband electromagnetic field. The range of field intensity amplitude measurement is from 1V / m to 200V / m, and the inaccuracy of measurement is 1.5dB.

Description

technical field [0001] The invention relates to the technical field of radio metering, in particular to a method for calibrating the field strength distribution characteristics of an electromagnetic reverberation chamber. Background technique [0002] At present, the domestic research on the space radio frequency electromagnetic field in the reverberation room mainly focuses on the research on the test method of a single parameter, the test method and automatic control of single or several parameters. However, the single-point test results cannot effectively reflect the real-time distribution characteristics of the reverberation room field strength. The calibration verification of comprehensive measurement and evaluation of the performance of the electromagnetic reverberation chamber cannot be realized, and the relevant research on the calibration position of the field strength probe and the simultaneous work of multiple probes and multiple measuring points has not been found...

AI Technical Summary

Problems solved by technology

[0002] At present, the domestic research on the space radio frequency electromagnetic field in the reverberation room mainly focuses on the research on the test method of a single parameter, the test method and automatic control of a single or several parameters. However, the single-point test results cannot effectively reflect the real-time distribution characteristics of the reverberation room field strength. The calibration verification of comprehensive measurement and evaluation of the performance of the electromagnetic reverberation chamber cannot be realized, and the relevant research on the calibration position of the field strength probe and the simultaneous work of multiple probes and multiple measuring points has not been found. Therefore, the present invention needs to carry out multi-probe and multiple The method of testing the measuring points at the same time, and research on the parameter settings such as the calibration position of the field strength probe

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