High Efficiency RF and Microwave Solid State Power Amplifiers

Paolo Colantonio was born in Rome on March 1969 and he received Electronic Engineering and Ph.D degrees in Microelectronics and Telecommunications from the University of Roma ‘Tor Vergata’ in 1994 and 2000 respectively, working on design criteria for high efficiency power amplifiers. In 1999 he became a research assistant at the Electronic Engineering Department of the University of Roma ‘Tor Vergata’ and since 2002 he has been a professor of microwave electronics at the same university.
His research activities are mainly focused on the field of microwave and millimetre-wave electronics, and in particular on design criteria for nonlinear microwave subsystems. This activity resulted in the development of innovative design criteria for high efficiency and high linear power amplifiers, oriented to the optimization of power performance making use of harmonic tuning classes of operation. The results of such activities have been presented in major conferences and ublished in international journals.
Paolo Colantonio has been responsible for the work package activity on ‘power amplifier design overview’ in the VI-FP European Network of Excellence TARGET (January 2004–June 2005) and general chairman of the international event ‘First TARGET NoE Workshop on RF Power Amplifiers’, held in Orvieto, Italy 2005.
He is author or co-author of more than 120 papers on PA design published in refereed journals or international conference proceedings and he has been awarded Best Poster Paper at GAAS 2000 (IMD performances of harmonically tuned microwave power amplifiers) and Best Paper at EuMIC 2007 (A 6W Uneven Doherty Power Amplifier in GaN Technology).

Franco Giannini was born in Galatina (LE), on November 9, 1944, and graduated in Electronics Engineering, summa cum laude in 1968, before getting the chair of Full Professor of Applied Electronics in 1980. In 2008 he was awarded the Laurea Honoris Causa Scientiarum Technicarum degree by the Warsaw University of Technology (WUT), Poland.
Since 1981 he has been at the University of Roma ‘Tor Vergata’, where he has been serving as Head of Department, Vice President for International Affairs, Pro-Rector, and Dean of the Faculty of Electronics Engineering. He presently chairs theMicrowave Engineering Centre for Space Applications (MECSA).
He has been working on modelling, characterization and design methodologies of active and passive microwave components and circuits, including MICs and MMICs for telecommunication and space applications, authoring or co-authoring more than 400 scientific contributions.
He chaired the theme MMICs of the national project MADESS I of the CNR and was a member of the Management Board of MADESS II, chairman of the theme MMICs of the National Project MICROELECTRONICS, and member of the Board of Directors of the Italian Space Agency (ASI).
He has also been active in many European Projects, and was the Italian representative in the ‘European Working Group for GaAs Microelectronics’. He has been acting as consultant for various national and international organizations, including the ITU for the United Nations Development Program (UNDP), and the European Union for ESPRIT, LTR, ISTC projects. He has been chairman of various International Symposia on Microwave & MillimetreWave Techniques and is a member of many committees of international scientific conferences.
In 1996 Professor Giannini was awarded the ‘Irena Galewska Kielbasinski Prize’ by the Technical University of Darmstadt, Germany, and an Honorary Professorship by WUT, Poland, in 2001.

Ernesto Limiti has been Full Professor of Electronics at the University of Roma ‘Tor Vergata’ since 2002, after being associate professor and researcher at the same university since 1991.
He teaches undergraduate courses in microwave electronics, namely Microwave Electronics (basic) andMicrowave Instrumentation and Measurements, all of them at the LaureaMagistrale in the Electronic Engineering degree course (i.e. towards students with at least three years experience at the university). He also teaches MSc and PhD courses, both at the University of Roma ‘Tor Vergata’ and at other Italian universities.
His scientific interests encompass a broad range of topics, including microwave active device characterization and modelling, regarding both linear (small-signal and noise) and nonlinear regimes and microwave subsystems design methodologies. Regarding the latter, high efficiency power amplifier design methodologies have been his focus since 1992, oriented towards power performance optimization making use of harmonic tuning operating classes. This research topic has been investigated also in the frame of European research projects, e.g. Manpower, Edge, and others. The results on the work in high efficiency power amplifier design approaches have been presented in major conferences and published in international journals.
Ernesto Limiti is author or co-author of more than 200 papers appearing in refereed journals or international conference proceedings. He is a member of the Editorial Board of the International Journal of Microwave and Millimetre-Wave CAE (Wiley Interscience), serving also as a reviewer for various IEEE Transactions and IET Journals.
He has been general chairman and organizer of the 2004 international workshop on Integrated Nonlinear Microwave and Millimetre-wave Circuits (INMMiC 2004) as well as the 11th International Symposium on Microwave and Optical Technology (ISMOT 2007).