Compensation of Performance Degradation due to Thermal Effects in GaN LNA Using Dynamic Bias
Paper in proceedings, 2018

This paper investigates the possibilities of using a dynamic bias control scheme for a low noise amplifier to compensate for performance degradation due to thermal effects. The study was performed by characterization of bias voltage and temperature dependence between -25°C to 75°C of a GaN MMIC LNA. The performance, in terms of gain, linearity and noise, degraded, at elevated chip temperatures. Nonlinear behavioral models were developed and used to predict performance for different bias and temperature conditions. Bias conditions to achieve constant gain and noise figure versus temperature are determined. Enhanced RF performance, with improved gain and linearity is demonstrated and is shown to require increased power and involves a trade-off between improving noise figure and gain.

modeling

gain control

dynamic bias

low noise amplifier

thermal effects

Author

Johan Bremer

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics, Microwave Electronics

Lowisa Hanning

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics, Microwave Electronics

Niklas Rorsman

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics, Microwave Electronics

Mattias Thorsell

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics, Microwave Electronics

EuMIC 2018 - 2018 13th European Microwave Integrated Circuits Conference

245-248 8539890

13th European Microwave Integrated Circuits Conference, EuMIC 2018
Madrid, Spain,

Subject Categories

Other Physics Topics

Signal Processing

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.23919/EuMIC.2018.8539890

More information

Latest update

1/24/2019