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Frequency-Domain Techniques

Layout of an AWR Design Environment from 1W X-band HPA MMIC design

The ICESTARS partners AWR-APLAC Corporation, Infineon, Oulu University and NXP have aimed at developing new frequency-domain algorithms and improving the existing ones to provide RF designers with the most effective simulation tool at millimetre wave frequencies. The Harmonic Balance algorithm in particular has been improved to better scale with system size and to better adapt to the design case and simulation environment. Volterra-type analysis has been used for detailed distortion analysis especially needed to design linear power amplifieres. On the methodological side practises have been developed that enable adaptive selection of optimal algorithms or variants of the existing/developed algorithms.

Frequency Domain Techniques in ICESTARS deal mainly with the Harmonic Balance (HB) algorithm as well as Volterra on HB (VoHB), which utilizes Harmonic Balance as one step of the whole analysis.

For HB analysis the adaptivity will be tested by forcing the test circuits to a state with poor convergence. This is done by increasing the power level, which in its turn increases the circuit nonlinearity. This then shows the algorithms' ability to treat poor convergence.
 

Work package leader: Taisto Tinttunen (
AWR-APLAC Corporation, Finland)


Objectives

This workpackage aims to develop new and improve the existing frequency-domain algorithms in order to provide RF designers with the most effective simulation tools.

The objectives are
to develop simulation methods and algorithms that have optimal scaling properties with regard to component count, number of frequencies and number of unknowns

to develop practices that enable adaptive selection of optimal algorithms or variants of the existing/developed algorithms

to develop HB diagnostic tools to enable high robustness of frequency-domain RF-simulators

to develop an efficient analysis and dimensioning environment for optimizing the linearity and power efficiency of  RF power amplifiers

to extend and refine the numerical algorithms of the present Volterra-on-HB (VoHB) simulation.