Compact Analog Predistorter With Shape Tuning Capability Using Power-Dependent Impedance Matching Network

This brief presents a novel shape tunable reflective analog predistortion (RAPD) linearizer with a simple structure. The power-dependent impedance matching network (PIMN) based on parallel Schottky diode is applied to the RAPD linearizer to achieve the shape tuning function. Influence of the PIMN on the impedance of the nonlinear load is analyzed in detail. Two different types of shape tunable linearizers for the solid state power amplifier (SSPA) and the travelling wave tube amplifier (TWTA) are proposed and simulated. The shape tuning capability has been verified by a fabricated C-band RAPD linearizer. Good linearity improvement has been achieved for a C-band 20 W SSPA with the proposed linearizer.

[1]  Meenakshi Rawat,et al.  RFin–RFout Linearizer System Design for Satellite Communication , 2018, IEEE Transactions on Electron Devices.

[2]  Dongfang Zhou,et al.  Analog Predistortion Linearizer With Independently Tunable Gain and Phase Conversions for Ka-Band TWTA , 2019, IEEE Transactions on Electron Devices.

[3]  Bin Luo,et al.  Development of Ka-Band BUC with Wideband Linearizer for High Speed Satellite Communications , 2017, GLOBECOM 2017 - 2017 IEEE Global Communications Conference.

[4]  A. Katz,et al.  Linearizers for ${Q}$ - and ${V}$ -Band TWTAs , 2018 .

[5]  J. Maynard,et al.  New Wide Band Predistortion Linearizer with an Advanced Shape Tuning Capability for Space Applications , 2007, 2007 IEEE International Vacuum Electronics Conference.

[6]  S. C. Bera,et al.  Diode-based predistortion lineariser for power amplifiers , 2008 .

[7]  Smail Bachir,et al.  Analog predistortion for high power amplifier over the Ku-band (13,75–14,5 GHz) , 2017, 2017 47th European Microwave Conference (EuMC).

[8]  Jean-Louis Cazaux,et al.  High accuracy wide band analog predistortion linearizer for Telecom satellite transmit section , 2010, 2010 IEEE MTT-S International Microwave Symposium.

[9]  Yi Zhang,et al.  A tunable reflective analog predistorter based on variable impedance matching network , 2019, AEU - International Journal of Electronics and Communications.

[10]  Allen Katz,et al.  The Evolution of PA Linearization: From Classic Feedforward and Feedback Through Analog and Digital Predistortion , 2016, IEEE Microwave Magazine.

[11]  T.M. Antonsen,et al.  Linearizability of TWTAs using predistortion techniques , 2005, IEEE Transactions on Electron Devices.

[12]  Fadhel M. Ghannouchi,et al.  A systematic methodology to design analog predistortion linearizer for dual inflection power amplifiers , 2011, 2011 IEEE MTT-S International Microwave Symposium.

[13]  Sudipto Chakraborty,et al.  High-Efficiency E-Band Power Amplifiers and Transmitter Using Gate Capacitance Linearization in a 65-nm CMOS Process , 2017, IEEE Transactions on Circuits and Systems II: Express Briefs.

[14]  Kaixue Ma,et al.  A Simplified Transistor-Based Analog Predistorter for a GaN Power Amplifier , 2018, IEEE Transactions on Circuits and Systems II: Express Briefs.

[15]  Younkyu Chung,et al.  Linearization of a Spatially-Combined X-Band 100-W GaAs FET Power Amplifier System with Predistortion Linearizer , 2012, 2012 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS).