Anechoic chamber interface device

Abstract

The utility model discloses an anechoic chamber interface device which comprises a metal pipe section fixed in a wall of an anechoic chamber, two ends of the metal pipe section respectively penetrate out of the wall, one end of the metal pipe section is exposed out of the anechoic chamber, the other end of the metal pipe section is exposed out of the anechoic chamber, and a cable penetrates into the anechoic chamber through the metal pipe section. The interface device also comprises two shielding layers which are respectively wrapped on the exposed end of the metal pipe section and a section of the cable which passes through the metal pipe section. When the electromagnetic compatibility testing device is used, the cable directly penetrates into the anechoic chamber, and due to the fact that the cable does not pass through any switching, the line loss is low and is only the line loss of one wire, the loss of a link is reduced, the uncertainty introduced during link connection is also reduced, and the accuracy and the reliability of an electromagnetic compatibility testing result can be better guaranteed.

Description

Technical Field

[0001] The utility model relates to an interface device for an anechoic chamber. Background Art

[0002] As Figure 1 shown in the figure, currently, RF cables are all connected to the anechoic chamber through the partition connectors 5 on the wall of the anechoic chamber 1. The partition connectors 5 are fixed inside the wall, with the front and back surfaces exposed respectively, and both are provided with connection joints. The RF cable 6 outside the anechoic chamber is connected to the connection joint on the front surface of the partition connector 5, and the RF cable 4 inside the anechoic chamber is connected to the connection joint on the back surface of the partition connector 5, so as to realize the connection of the RF cable.

[0003] This kind of partition connector will cause link loss and cable mismatch, resulting in an increase in uncertainty. This is clearly recorded in the standard CISPR25:2021, and this kind of uncertainty will also increase with long-term use, thus affecting the accuracy and reliability of electromagnetic compatibility test results. Summary of the Utility Model

[0004] The invention purpose of the utility model is to provide an interface device with a new structure for RF cable to access an anechoic chamber. By using the interface device of the utility model, it is beneficial to reduce the uncertainty of electromagnetic compatibility test and improve the accuracy and reliability of electromagnetic compatibility test results.

[0005] The invention purpose of the utility model is realized through the following technical solution: an anechoic chamber interface device, characterized in that it includes a metal pipe section fixed in the wall of the anechoic chamber, and both ends of the metal pipe section penetrate through the wall respectively, one end is exposed in the anechoic chamber, and the other end is exposed outside the anechoic chamber, for the cable to penetrate into the anechoic chamber. The interface device further includes two shielding layers, which are respectively wrapped on the exposed ends of the metal pipe section and a section of the cable passing through them.

[0006] The shielding layer is preferably a metal shielding layer.

[0007] Beneficial Effects

[0008] When using the utility model, the cable directly penetrates into the anechoic chamber. Since there is no transfer, the line loss is low, only the line loss of a single wire, reducing the link loss and the uncertainty introduced during link connection, and can better ensure the accuracy and reliability of electromagnetic compatibility test results. Description of the Drawings

[0009] Figure 1 It is a schematic structural diagram of an RF cable accessing an anechoic chamber in the prior art;

[0010] Figure 2This is a schematic structural diagram of the interface device of the radio anechoic chamber of the present utility model. Specific embodiments

[0011] As Figure 2 As shown, the interface device of the radio anechoic chamber of the present utility model includes a metal pipe section 2 fixed in the wall of the radio anechoic chamber 1. Both ends of the metal pipe section 2 penetrate through the wall. One end is exposed to the inside of the radio anechoic chamber 1, and the other end is exposed outside the radio anechoic chamber 1 for a radio frequency cable 4 to penetrate into the radio anechoic chamber 1. The interface device further includes two shielding layers 31 and 32, which are respectively wrapped around the exposed ends of the metal pipe section 2 and a section of the radio frequency cable 4 passing through them. Here, the shielding layer is preferably a metal shielding layer.

[0012] When using the present utility model, the cable directly penetrates into the radio anechoic chamber. Since there is no transfer through any device, the line loss is low, which is only the line loss of a single wire, reducing the loss of the link and also reducing the uncertainty introduced during link connection. The risks of electromagnetic interference and signal leakage are lower, and it can better ensure the accuracy and reliability of the electromagnetic compatibility test results. The interface device of the radio anechoic chamber of the present utility model is of great significance for ensuring the normal operation of electronic products in the electromagnetic environment and is expected to be widely applied in the field of electromagnetic compatibility testing.

Claims

1. An anechoic chamber interface device, characterized in that: It includes a metal pipe section fixed in the wall of the radio wave darkroom, with both ends of the metal pipe section passing through the wall respectively, one end exposed to the radio wave darkroom, and the other end exposed outside the radio wave darkroom, and is used for cables to pass through the radio wave darkroom. The interface device also includes two shielding layers, which are respectively wrapped around the exposed ends of the metal pipe section and a section of the cable passing through them.

2. The anechoic chamber interface device according to claim 1, characterized in that: The shielding layer is a metal shielding layer.

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