Utilizarea structurilor de tip ghid integrat in substrat pentru masurarea permitivitatii materialelor dielectrice in domeniul microundelor - SIWcell

Dr. Alexandra Stefanescu, Director de proiect

Educatie si formare:
2001 – 2006 - Electrotehnică Generală, Inginerie Electrică Asistată de Calculator, Universitatea Politehnica Bucuresti, Facultatea de Inginerie Electrică
Proiect de diploma: Recursive Identification of C.A.R. Models from Irregularly Sampled Signals (in Engleza) la Ecole Superieur d’Electricite (SUPELEC), Franta

2006 – 2009 - Doctor Inginerie Electrică, Universitatea Politehnica Bucuresti, Facultatea de Inginerie Electrică
Teza de doctorat: Modele parametrice pentru interconexiunile din circuitele analogice integrate de înaltă frecvenţă

Experienta profesionala

2009 – prezent - Institutul Naţional de Cercetare şi Dezvoltare în Microtehnologii, IMT Bucureşti
2006 – 2009 - Universitatea Politehnica Bucureşti, Centrul de Inginerie Electrică Asistată de Calculator (CIEAC)

Lucrari in reviste ISI (selectie):

1. A. Stefanescu, A. Muller, I. Giangu, A. Dinescu, G. Konstantinidis, "Influence of Au-Based Metallization on the Phase Velocity of GaN on Si Surface Acoustic Wave Resonators", IEEE Electron Device Letters, Vol. 37, no. 3, March 2016, pp. 321 – 324

2. A. Muller, I. Giangu, A. Stavrinidis, A. Stefanescu, G. Stavrinidis, A. Dinescu, G. Konstantinidis, "Sezawa Propagation Mode in GaN on Si Surface Acoustic Wave Type Temperature Sensor Structures Operating at GHz Frequencies", IEEE Electron Device Letters, Vol. 36, no. 12, 2015, pp. 1299 – 1302

3. A Müller, G. Konstantinidis, V. Buiculescu, A. Dinescu, A. Stavrinidis, A. Stefanescu, G. Stavrinidis, I. Giangu, A. Cismaru, A. Modoveanu, "GaN/Si based single SAW resonator temperature sensor operating in the GHz frequency range", Sensors and Actuators A: Physical, Vol. 209, 2014, pp. 115–123

4. V. Buiculescu, A. Stefanescu, “Choke flange-like structure for substrate integrated waveguide components cascading”, Electronics Letters, Vol. 48, no. 2, 2012, pp. 1349-1350

5. A. Stefanescu, D. Neculoiu, A. Muller, A. Dinescu, G. Konstantinidis, A. Stavrinidis, "Analysis of GaN Based SAW Resonators including FEM Modeling", Romanian Journal of Information Science and Technology, Vol. 41, Issue 4, 2011, pp. 334-345

Articole in volumele unor manifestari stiintifice indexate (selectie):

1. G. Ciuprina, C.-B. Dita, A.-S. Lup, D. Ioan, A. Stefanescu, "Extraction of TL-lumped RF macromodels for MEMS switches", 2015 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO), Ottawa, Ontario, 2015, pp. 1-4

2. A. Stefanescu, V. Buiculescu, I. Giangu, “Floating Connector for Surface Integrated Waveguide Components and Its Extended Applications”, APMC 2014, Session WE1D waveguide and Transmission Line structures, Sendai , Japan, 4-7 Nov. 2014, pp. 46-48

3. A. Muller, G. Konstantinidis, I. Giangu, V. Buiculescu, A. Dinescu, A. Stefanescu, A. Stavrinidis, G. Stavrinidis, "GaN-based SAW structures resonating within the 5.4-8.5 GHz frequency range, for high sensitivity temperature sensors” Proceedings of Microwave Symposium (IMS), 2014 IEEE MTT-S International Conference, 2014, pp. 1-4

4. A. Stefanescu, V. Buiculescu, A. Dinescu, A. Cismaru, A. Muller, G. Konstantinidis, A. Stavrinidis, G. Stavrinidis, "Modeling of SAW Resonators Fabricated on GaN/Si", The International IEEE Conference on Microwaves, Communications, Antennas and Electronic Systems, (IEEE COMCAS), October 2013, Tel Aviv, Israel, electronic proceeding (unpaged)

5. A. Cismaru, A. Muller, F. Comanescu, M. Purica, A. Stefanescu, A. Dinescu, "Morphological analysis of GaN membranes obtained by micomachining of GaN/Si", 2013 IEEE International reliability Physics Symposium, Monterey, USA, proceeding electronic, April 2013, M.E.2.1 – M.E.2.4

6. A. Stefanescu, A. Muller, G. Konstantinidis, V. Buiculescu, A. Dinescu, A. Stavrinidis, D. Neculoiu, A. Cismaru, "SAW GaN/Si Based Resonators: Modeling and Experimental Validation", Proceedings International Semiconductor Conference (CAS 2012), Sinaia, Oct. 2012, vol. 1, pp. 193 – 196

7. A. Stefanescu, A. Muller, A. Dinescu, G. Konstantinidis, A. Cismaru, A. Stavrinidis, D. Neculoiu, "FEM Analysis of GaN Based Surface Acoustic Wave Resonators", International Semiconductor Conference (CAS) Proceedings, Sinaia, Oct. 2011vol. 1, pp. 177 – 180

8. A. Stefanescu, D. Ioan, and G. Ciuprina, “Parametric Models of Transmission Lines Based on First Order Sensitivities”, Mathematics in Industry, 1, Volume 14, Scientific Computing in Electrical Engineering, SCEE 2008, Part 1, Springer, 2010, pp. 29-36

Capitole in carti - selectie:

1. G. Ciuprina, J. F. Villena, D. Ioan, Z. Ilievski, S. Kula, E. JanW. ter Maten, K. Mohaghegh, R. Pulch, W.H.A. Schilders, L. M. Silveira, A. Stefanescu, and M. Striebel, “Parameterized Model Order Reduction”, Mathematics in Industry, 21, Coupled Multiscale Simulation and Optimization in Nanoelectronics, Springer, 2015, pp. 267 - 360

2. G. Ciuprina, A. Stefanescu, D. Ioan, “Frequency dependent parametric models for transmission line structures”, Computer field models of electromagnetic devices (S. Wiak, E. Napieralska-Juszczak Eds), IOS Press 2010, pp.618-625