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Module Purpose

Twisted Pair Impedance is a high-frequency communications calculator. It computes the characteristic impedance (Z₀), propagation delay, and capacitance of a twisted wire pair based on wire diameter, insulation spacing, and dielectric properties.

Calculators · ELECTRICS

Twisted Pair Impedance

Reference Manual & Technical Spec

Twisted Pair Impedance — Overview & Engineering Principles

Twisted Pair Impedance is a high-frequency communications calculator. It computes the characteristic impedance (Z₀), propagation delay, and capacitance of a twisted wire pair based on wire diameter, insulation spacing, and dielectric properties.

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Zero-Trust Client Execution

Wire geometries and dielectric properties are computed locally using standard electromagnetic equations. Your design specifications are kept confidential and offline, protecting intellectual properties.

Step-by-Step Operation Guide

  1. Input the conductor diameter (d) and insulation spacing (D) using the slider inputs.
  2. Set the dielectric constant (E_r) based on your wire insulation material.
  3. Observe the characteristic impedance (Ohms) and propagation delay update in real time.
  4. Reference the mathematical formulas used to derive the characteristic impedance.

Technical Specification Matrix

FormulaZ₀ = (120 / sqrt(E_r)) * acosh(D / d)
Dielectric PresetsTeflon (2.1), Polyethylene (2.3), PVC (3.0), Air (1.0)
AccuracyDouble-precision trigonometric float solver