CableExpert – Fast and Accurate Cable Modeling and Simulation

Overview

Cable is commonly seen in high-speed systems. Accurate modeling and simulation are necessary for signal integrity purpose. It is a challenge to build accurate model and simulate it in an efficient way. CableExpert offers a quick way to build 3D model with its built-in templates to handle various drain types including center drain and dual drain, various twine shielding including longitudinal and wrapping, auto port generation to simplify EM setup, and parametric sweep for easy what-if analysis. The tool offers both 2D and 3D simulation for different application usage, 2D FEM solver to generate RLGC model and 3D FEM solver to generate S-parameter model. Both solvers adopt distributed processing and multi-core parallelization which adds another level of speedup. The tool has a built-in algorithm treating a long cable as simulating it as a whole is impossible. It offers users a quick way to export a script for use in HFSS.

HighLights
  1. Cable is commonly seen in high-speed systems. Accurate modeling and simulation is necessary for signal integrity purpose. It is a challenge to build accurate model and simulate it in an efficient way.
  2. CableExpert offers a quick way to build 3D model with its built-in templates
    • Various drain types including center drain and dual drain
    • Various twine shielding including longitudinal and wrapping
    • Auto port generation to simplify EM setup
    • Parametric sweep for easy what-if analysis
  3. The tool offers both 2D and 3D simulation for different application usage. 2D FEM solver to generate RLGC model. 3D FEM solver to generate S-parameter model. Both of them adopt distributed processing and multi-core parallelization which adds another level of speedup.
  4. The tool has a built-in algorithm treating a long cable as simulating it as a whole is impossible
  5. The tool offers users a quick way to export to HFSS for benchmark purpose.
  6. Python script automation
Main Features

Built-in Templates to Create Complex Cables

Twinax with different drain/wrapping types

  • Center/dual drain
  • Longitudinal/Spiral wrapping

Twisted pair

  • Unshielded – UTP
  • Shielded – STP

Parametric Support

  • CableExpert supports parametric sweep for twine style with different twine gap locations for longitudinal or wrapping angles for wrapping style. The tool makes it easy for users to optimize cables’ performance.
  • For a spiral wrapped twinaxial cable, the resonant frequency increases with the wrapping angle and more ripples in TDR appear.

Twinax with Center Drain & Longitudinal Twine Shielding

  • Twinax with center drain and longitudinal shielding can be simulated using either 2D or 3D solver

Twinax with Dual Drain & Longitudinal Twine Shielding

  • Twinax with dual drain and longitudinal twine shielding is used for high frequency (up to 25G) application. It is difficult to make drains and signals in the same horizon that determined the SCD performance. CableExpert provides a flexible way to adjust the offset of each drains.

Twinax with Center Drain & Spiral Wrap &Benchmark

  • Twinax with center drain and spiral wrap is popular but its 3D model is difficult to create. CableExpert has a template to do it. Plus, simulation agrees excellently with measurement.

Unshielded Twisted Pair & Benchmark

  • Unshielded twisted pair (UTP) is frequently used in high-speed applications. Because of the twisted structure, it is difficult to create its 3D model. CableExpert makes the creation easy and also provides export to other 3D simulators

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