Estimation of Load-Pull Reflection Coefficients for Modulated Signals
Paper in proceeding, 2018

A method to estimate reflection coefficients in a loadpull environment with modulated signals is proposed, which can be applied during the design stage and characterization of devices and components for next generation systems. The technique is based on least-square estimation of the impulse response of a finite impulse response filter. The proposed technique along with the conventional method are described and analyzed theoretically. The two approaches are experimentally demonstrated, verified, and compared using a load pull measurement setup with 6W GaN power amplifier as the device under test. The proposed technique shows better performance for both in-band and out-of-band estimation of reflection coefficients.

Dynamic range



Frequency estimation

Finite impulse response filters

Reflection coefficient

Microwave filters


Dhecha Nopchinda

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Thomas Eriksson

Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks

Koen Buisman

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

IEEE MTT-S International Microwave Symposium Digest

0149645X (ISSN)

978-1-5386-5067-7 (ISBN)

2018 IEEE/MTT-S International Microwave Symposium - IMS
Philadelphia, PA, USA,

Areas of Advance

Information and Communication Technology


Kollberg Laboratory

Driving Forces

Sustainable development

Innovation and entrepreneurship

Subject Categories

Probability Theory and Statistics

Signal Processing

Other Electrical Engineering, Electronic Engineering, Information Engineering



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