Research on a Flexible Integrated Testing System for Electrical Measurement Equipment Based on Radio Frequency Electromagnetic Field Environment

In order to investigate the potential electromagnetic interference effects on electrical measurement equipment under radio frequency (RF) electromagnetic field environments, and to enhance the automation level and testing accuracy of the detection process, a flexible and integrated testing device for electrical measurement equipment was designed. In accordance with the new national standard GB/T 17215.211-2021, tests were conducted on all six surfaces of the equipment. A three-dimensional model of a log-periodic antenna was established, and numerical simulations were performed using the CST Studio Suite software to simulate the log-periodic antenna in an anechoic chamber, obtaining the Voltage Standing Wave Ratio (VSWR) within the 80 MHz to 2 GHz frequency range. Simulation results show that changes in the test forward plane and antenna frequency lead to consistent VSWR trends across the entire frequency band. The VSWR remains below 2 (when the frequency is expressed in GHz, the VSWR value should be divided by 1000), indicating that the automated testing system does not interfere with the RF electromagnetic field immunity testing of the electrical measurement equipment. This ensures the accuracy of the measurement results.