X-Parameters

X-parameters are a mathematical superset of S-parameters and are used for characterizing the amplitudes & relative phase of harmonics generated by nonlinear components under large input power levels.

Description

Agilent’s X-parameters* represent a new category of nonlinear network parameters for high-frequency design. X-parameters:

  • Are applicable to both large-signal and small-signal conditions, and for linear and nonlinear components.
  • Characterize the amplitudes and relative phase of harmonics generated by components under large input power levels at all ports.
  • Correctly characterize impedance mismatches and frequency mixing behavior to allow accurate simulation of cascaded nonlinear X-parameter blocks, such as amplifiers and mixers in wireless design.
  • Functionality was included in the Nonlinear Vector Network Analyzer (NVNA), and the Advanced Design System in 2008.

NVNA Nonlinear Measurements and ADS Simulation and Design
Measure and view X-parameters with the Agilent NVNA and ADS
vue aggrandie

X-parameters can help you overcome a key challenge in RF engineering, namely that of nonlinear impedance differences, harmonic mixing, and nonlinear reflection effects that occur when components are cascaded under large signal operating conditions. X-parameters help solve this complex cascading problem: if you measure the X-parameters of a set of components individually, you can calculate the X-parameters and hence the nonlinear transfer function of any cascade made from them. Calculations based on X-parameters are usually performed within a harmonic balance simulator environment.

* "X-parameters" is a registered trademark of Agilent Technologies. The X-parameter format and underlying equations are open and documented. For more information click here.

Produits connexes

suite...

Liens associés