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System for calculating crosstalk strength among cables based on partial element equivalent circuit (PEEC) theory

An equivalent circuit and cable technology, applied in the field of calculating crosstalk between multiple cables

Active Publication Date: 2012-05-30
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to reduce the influence of crosstalk, it is first necessary to effectively and accurately model and analyze the coupling inductance and coupling capacitance between cables, which is not an easy task

Method used

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  • System for calculating crosstalk strength among cables based on partial element equivalent circuit (PEEC) theory
  • System for calculating crosstalk strength among cables based on partial element equivalent circuit (PEEC) theory
  • System for calculating crosstalk strength among cables based on partial element equivalent circuit (PEEC) theory

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Embodiment 1

[0070] On the copper plate (copper plate size W L = 1m, W W = 0.5m, W T = 0.5mm, W σ =5.8×10 7 S / m) arrange two copper cables in parallel (such as Figure 4 shown), the length of cable A (port A to port B) is L=0.3m, diameter D=1mm, conductivity σ=5.8×10 7 S / m, height from metal plate H=5mm, length L of cable B (port C to port D)=0.3m, diameter D=1mm, conductivity σ=5.8×10 7 S / m, height H=5mm from the metal plate; the coordinate starting point of the A cable is X=0.3m, Y=0.3m, and the coordinate starting point of the B cable is X=0.3m, Y=0.2m.

[0071] According to the calculation method of the crosstalk coupling between the parallel cable crosstalk modules of the present invention, the parallel cables and their copper plates are as follows: Figure 4 structure shown. Add a pulse signal source at port A, the low level is 0V, the high level is 1V, the delay time is 0ns, the rise time is 400ns, the fall time is 400ns, the pulse width is 1200ns, and the pulse period is 400...

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Abstract

The invention discloses a system for calculating crosstalk strength among cables based on a partial element equivalent circuit (PEEC) theory. The system comprises a computer and a parallel cable crosstalk module stored in the computer, wherein the parallel cable crosstalk module is redacted by applying VC++6.0 in the computer according to the PEEC theory. A parameter input and configuration unit acquires a cable configuration picture of cables and a metal plate according to configuration parameters; an SPICE circuit modeling unit carries out conversion process by adopting the PEEC theory to obtain an SPICE circuit; and an interference strength analysis unit obtains the crosstalk coupling interference strength of near-end equipment and far-end equipment of parallel cables according to an exciting source and a load which are loaded on the SPICE circuit. By adopting the PEEC theory to analyze the crosstalk among the cables, the invention can accurately and effectively calculate the coupling induction and the coupling capacitance between the cables and obtain the crosstalk strength between the cables.

Description

technical field [0001] The present invention relates to a method for calculating the crosstalk between multiple cables, more particularly, it refers to a calculation of the crosstalk between the cables installed above the metal plate based on the partial element equivalent circuit theory, the interference obtained by the calculation Strength can provide a basis for cable layout and electromagnetic protection in product use. Background technique [0002] Cables are widely used in short-distance communication between devices, such as figure 1 As shown, multiple devices are installed on a metal plate 1, and cables are used to communicate among the multiple devices. That is, A cable 11 is used to realize communication between A device 21 and B device 22; B cable 12 is used to realize communication between C device 23 and D device 24; C cable 13 is used to realize communication between E device 25 and F device 26 Communication; however, due to the existence of mutual inductance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 陈爱新刘跃东汪玉梅苏东林
Owner BEIHANG UNIV
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