Data line shielding effectiveness detection circuit and method

Abstract

The invention discloses a data line shielding effectiveness detection circuit, which comprises a multi-inner-core data line. The multi-inner-core data line comprises at least two inner cores and a shielding layer surrounding the inner cores. The inner cores comprise a to-be-detected inner core and a non-to-be-detected inner core. One end of a first resistor is connected with a first port of a network analyzer, the other end of the first resistor is connected with one end of the to-be-detected inner core, the other end of the to-be-detected inner core is connected with one end of a second resistor, and the other end of the second resistor is grounded. One end of a third resistor is connected with a second port of the network analyzer, the other end of the third resistor is connected with one end of the shielding layer, the other end of the shielding layer is connected with one end of a fourth resistor, and the other end of the fourth resistor is grounded. One end of the non-to-be-detected core is connected with one end of a fifth resistor, and the other end of the fifth resistor is grounded. The other end of the non-to-be-detected core is connected with one end of a sixth resistor,and the other end of the sixth resistor is grounded. The network analyzer is used for acquiring shielding effectiveness of the multi-inner-core data line under the correspondingly set to-be-detected frequency bands. The data line shielding effectiveness detection circuit and method can effectively detect the shielding effectiveness of the multi-inner-core data line.

Description

technical field [0001] The invention relates to the technical field of cable electromagnetic compatibility detection, in particular to a data line shielding effectiveness detection circuit and method. Background technique [0002] While data cables are connecting electronic devices and transmitting signals, the shielding performance of cables and their components has also become one of the important factors affecting the electromagnetic compatibility of electronic systems. With the wide application of power and wireless communications, the electromagnetic environment is becoming more and more complex. . In order to shield the electromagnetic field well, many manufacturers choose to set the shielding layer in the cable. Even so, a large voltage and current may be induced on the shielding layer to bring unnecessary impact on the system, ranging from signal distortion to serious. It can also damage the equipment. As the main connection carrier, the shielding effectiveness of ...

AI Technical Summary

Problems solved by technology

[0003] At present, the detection methods for the shielding effectiveness of radio frequency cables are relatively mature, but the detection methods for data lines of multi-core transmission signals are relatively scarce. With the development of mobile phones, mobile hard disks, and vehicle-mounted equipment, the data The demand for wire shielding effectiveness testing is increasing

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