Standard for near end crosstalk of category 6A cable (CAT 6A)

Patent metadata

Field	Value
Publication number	US-12488912-B2
Application number	US-202318177449-A
Country	US
Kind code	B2
Filing date	Mar 2, 2023
Priority date	Oct 20, 2022
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

A standard for near end crosstalk of a category 6A cable, including a registered jack 45 (RJ45), a clamp connected to the RJ45, a first attenuator and a second attenuator. The RJ45 includes a first signal twisted pair to transmit a first source signal and a second source signal, and a second signal twisted pair to transmit a third source signal and a fourth source signal. The clamp includes a first signal pair connector electrically connected to the first signal twisted pair, a second signal pair connector electrically connected to the second signal twisted pair, a first differential amplification circuit and a second differential amplification circuit. The first attenuator is electrically connected to the first signal pair connector. The second attenuator is electrically connected to the second signal pair connector. The second attenuator and the first attenuator are configured to detect the near end crosstalk.

First claim

What is claimed is:

1 . A standard for near end crosstalk of a category 6A cable (CAT 6A), comprising:
a registered jack 45 (RJ45); a clamp; a first attenuator; and a second attenuator; wherein the RJ45 comprises at least one first signal twisted pair and a second signal twisted pair; the at least one first signal twisted pair is configured to transmit a first source signal and a second source signal; and the second signal twisted pair is configured to transmit a third source signal and a fourth source signal; the clamp is connected to the RJ45; the clamp comprises at least one first signal pair connector and a second signal pair connector; the at least one first signal pair connector is electrically connected to the at least one first signal twisted pair; the second signal pair connector is electrically connected to the second signal twisted pair; the clamp further comprises a first differential amplification circuit and a second differential amplification circuit; the first differential amplification circuit is configured to perform differential operation on the first source signal and the second source signal, so as to convert an impedance of the at least one first signal twisted pair; and the second differential amplification circuit is configured to perform differential operation on the third source signal and the fourth source signal, so as to convert an impedance of the second signal twisted pair; the first attenuator is electrically connected to the at least one first signal pair connector; and the second attenuator is electrically connected to the second signal pair connector; and the second attenuator and the first attenuator are configured to measure near end crosstalk between the at least one first signal twisted pair and the second signal twisted pair.

2 . The standard of claim 1 , wherein the clamp further comprises a mainboard; the mainboard is electrically connected to the RJ45; the mainboard is provided with a plurality of first subminiature version A (SMA) connectors; the plurality of first SMA connectors are electrically connected to the mainboard; each of the at least one first signal pair connector comprises a second SMA connector and a third SMA connector; and the second signal pair connector comprises a fourth SMA connector and a fifth SMA connector.

3 . The standard of claim 2 , wherein a first end of the first attenuator is electrically connected to the second SMA connector, and a second end of the first attenuator is electrically connected to the fourth SMA connector; and a first end of the second attenuator is electrically connected to the third SMA connector, and a second end of the second attenuator is electrically connected to the fifth SMA connector.

4 . The standard of claim 3 , wherein the first end of the first attenuator is electrically connected to the second SMA connector via a first SMA connector wire, and the second end of the first attenuator is electrically connected to the fourth SMA connector via a second SMA connector wire; and the first end of the second attenuator is electrically connected to the third SMA connector via a third SMA connector wire, and the second end of the second attenuator is electrically connected to the fifth SMA connector via a fourth SMA connector wire.

5 . The standard of claim 2 , wherein the RJ45 comprises a transmitted signal twisted pair, a received signal twisted pair, a first spare signal twisted pair and a second spare signal twisted pair; the plurality of first SMA connectors comprise a transmitted signal SMA connector pair, a received signal SMA connector pair, a first spare signal SMA connector pair and a second spare signal SMA connector pair; the transmitted signal twisted pair is electrically connected to the transmitted signal SMA connector pair; the received signal twisted pair is electrically connected to the received signal SMA connector pair; the first spare signal twisted pair is electrically connected to the first spare signal SMA connector pair; and the second spare signal twisted pair is electrically connected to the second spare signal SMA connector pair.

6 . The standard of claim 5 , wherein the transmitted signal twisted pair comprises a transmitted positive signal wire and a transmitted negative signal wire; the received signal twisted pair comprises a received positive signal wire and a received negative signal wire; the first spare signal twisted pair comprises a first spare signal wire and a second spare signal wire; and the second spare signal twisted pair comprises a third spare signal wire and a fourth spare signal wire.

7 . The standard of claim 6 , wherein the transmitted signal SMA connector pair comprises a transmitted positive signal SMA connector, a transmitted negative signal SMA connector; the received signal SMA connector pair comprises a received positive signal SMA connector and a received negative signal SMA connector; the first spare signal SMA connector pair comprises a first spare signal SMA connector and a second spare signal SMA connector; and the second spare signal SMA connector pair comprises a third spare signal SMA connector and a fourth spare signal SMA connector.

8 . The standard of claim 7 , wherein the transmitted positive signal SMA connector, the transmitted negative signal SMA connector, the received positive signal SMA connector, the received negative signal SMA connector, the first spare signal SMA connector, the second spare signal SMA connector, the third spare signal SMA connector and the fourth spare signal SMA connector are provided on side edges of the mainboard at equal interval.

9 . The standard of claim 1 , wherein the first attenuator and the second attenuator have the same attenuation value.

10 . The standard of claim 1 , wherein the first attenuator and the second attenuator each comprise a coaxial attenuator.

Assignees

• Nat Inst Metrology China

Inventors

• Zhou Xin
• Wu Tong
• Shen Qingfei
• Yao Yao
• Tang Wei
• Fu Chao
• Li Anxiang
• Pang Xinhua

Classifications

• H01B11/125

  Specially adapted cable interconnections · CPC title

• H01R24/568

  Twisted pair cables · CPC title

• H01R24/56

  specially adapted to a specific shape of cables, e.g. corrugated cables, twisted pair cables, cables with two screens or hollow cables · CPC title

• H01B11/04 Primary

  with pairs or quads mutually positioned to reduce cross-talk · CPC title

• H04B3/487 Primary

  Testing crosstalk effects · CPC title