Microwave Design Engineer

Skills-QUALIFICATIONS

RF&Microwave Designer – Antenna Designer – RF System Designer

• Design, Development and RF Testing of all analog functions from concept to the final prototype of a

Transceiver system or in general of an RF & Microwave System.

• Full understanding from component up to system level (including antennas) of RF & Microwave

Applications development.

• Strong electromagnetic engineering background with practical applications orientation up to millimeter

Waves.

• Strong experience in RF and Microwave Printed Circuit Board Design using OEM components.

• Strong experience in passive planar structures design like filters, diplexers, power combiners/splitters,

Antennas, phase shifters, etc.

• Strong experience in metallic waveguide technology passive structures design such filters, diplexers, phase

Shifters, etc.

• Strong experience in antenna design either in planar, waveguide or wired form, including array design,

Feeding networks,etc.

• Expert user in commercial simulation software : Agilent ADS 2015, CST Microwave Studio 2015, CST

Design Studio 2015, Ansys HFSS 16.0, Mician Microwave Wizard 8.0, Antenna Magus 5.5, Altium DXP.

• RF and Microwave testing of analog systems and components.

• Technical management and support of Ph.D and junior engineers towards a specific technical target.

PROFESSIONAL EXPERIENCE

Microwave Engineering Consultant (under contract) 10/2014-1/3/2015

Design and Development of microwave and mmW passive components and systems for Huawei Research Center Munich.

RF/Microwave Designer (under contract) 10/2012 – 8/2014

Design and Development of microwave and mmW passive components and systems such as antenna fees, polarizers, antennas, diplexers, rotary joints, filters, etc to 60GHz and above for the Canadian company Apollo Microwaves (http://www.apollomw.com/)

RF/Microwave Technical Management 10/2003 – today

RF Design Engineer and co-founder of Advanced Microwave Systems Ltd (www.ams-mw.com), a leading SME in custom RF and microwave design of circuits and systems since 2003. In AMS Ltd my main role (except for managing the company) is the product development of analog microwave circuits and systems for applications covering both commercial and military use. My strong point is the design and development of microwave components and systems either in planar or 3D waveguide forms that incorporate novel functionality. In 2009 AMS Ltd gained a contract from European Space Agency (ESA) for the development of a Ka band transmitter for high bit rate low orbit satellites. The 18 months project ended successfully and the system was fully tested at ESOC.

I like hands-on engineering where I prefer to test myself the systems I design and thus gain practical experience which I use it as a feedback for the development of better designs.

RF/Microwave Designer-Senior Researcher 4/1992 –today

Working as a senior researcher in various EC funded projects in the National Technical University of Athens (NTUA) (http://www.iccs.gr/eng/) from 1992 till today, in the microwave and fiber optics laboratory of the NTUA. My participation in the EU research projects was mainly in the design and development of all the analog functionality needed in each project. Some examples include design, development and testing of amplifiers, mixers, up/down converters, filters, diplexers, power combiners/splitters, antennas of various technologies and transceivers. In many projects I was the technical lead for 3-5 diploma thesis and Ph.D students. Since 1995 up today I have supervised more than 30 diploma thesis and 20 Ph.D thesis students in the various fields of Microwave Engineering in the department of Electrical Engineering of the National Technical University of Athens.

RF Base Station Antennas/Components Designer 1/2009 –12/2011

RF Design Engineer in FASMETRICS SA (www.fasmetrics.com) since 2009. During my consultancy I have designed/developed and tested base station antennas for indoor and outdoor applications. I have also designed/developed and tested multiple input/output power splitter-combiners for GSM-DCS-PCS-UMTS base stations. Apart from the base station products I have also designed/developed and tested a 60 GHz Cassegrain type dish antenna as well as 60 GHz rectangular waveguide diplexers for a high bit rate (1.2 Gbit/s) point to point communication link. I have participated in various national research projects where I have developed a high power (200Watts) SPDT swith with very low insertion loss and short switching time capability for a base station application.

RF/Microwave Designer 1/1993 –12/2009

Working as an RF Design Engineer in INTRACOM TELECOM S.A (www.intracom.com) from 1993-2009 covering studies and development of prototypes from the low microwave spectrum of 1GHz up to 40 GHz. Prototypes include filters, diplexers, couplers, amplifiers, antennas, antenna arrays and microwave systems (VCOs, PLLs, frequency multipliers, frequency converters, etc) both in microstrip or other multilayered technology (typical substrates RO4003, RO3003, RO4350, RT5880, RT5870) as well as metallic rectangular waveguide technology.

Long experience in software EM tools such as Agilent ADS, Agilent Momentum, Agilent EMDS, Ansoft HFSS, Mician Microwave Wizard, Ansoft Designer, CST Microwave Studio, Altium DXP and other technical software.

Long experience in using microwave instrumentation such as vector network analyzers (HP8719A, HP8510C), spectrum analyzers (HP8592B, HP8565E, HP8595E), synthesized microwave sources (HP-ESG4000A, HP85160), etc.

Teaching Experience

Teaching experience over 7 years in microwaves, radio engineering and electronic circuits and systems in various universities of Athens (www.ntua.gr, www.aspete.gr, www.hna.gr).

EDUCATION

National Technical University of Athens (N.T.U.A.), Athens, Greece

5-year Bachelor of Arts, Electrical and Computer Engineering, GPA 8.10/10.00 (Very well), 1992

Diploma Thesis: “Design and development of high speed flip-flop based on tunnel diode architecture”

National Technical University of Athens (N.T.U.A.), Athens, Greece

Ph.D, Electrical and Computer Engineering, GPA 10.00/10.00 (Excellent), 1995

Ph.D Thesis: “Design and Development of Millimetre Wave Systems with Phase Coherency”

PROFESSIONAL AFFILIATIONS

• Technical Chamber of Greece (T.C.G.), Greece

• Hellenic Association of Mechanical & Electrical Engineers (HAMEE), Greece

• Member of IEEE Microwave Theory and Techniques since 1987

COMPUTER SKILLS

Applications: MS-Office, MS-Visio, MS-Project

Operating Systems: MS-DOS, WINDOWS, UNIX

Technical Software: Agilent ADS 2011, CST Microwave Studio, CST Design Studio, Ansys HFSS 13.0, Mician Microwave Wizard 7.7, Antenna Magus, Altium DXP

Languages

English: Excellent.

French: Good.

PERSONAL INTERESTS

My personal interests include reading, sailing, Shotokan Karate (II DAN)

RERERENCES

Available upon request

PUBLICATIONS

Publications in Journals

1. Y.E. Stratakos, N.V. Vlassopoulos, N.K. Uzunoglu, C.N. Capsalis, "Gunn Oscillator Injection Locking Circuit at Millimeter Wave Frequencies", International Journal of Infrared and Millimeter Waves, May 1995.

2. Polydorou, Y.E. Stratakos, C.N. Capsalis, N.K. Uzunoglu, "Comparative Study of Millimeter Wave Propagation at 30GHz and 60GHz in Indoor Environment", International Journal of Infrared and Millimeter Waves.

3. Y.E Stratakos, N.K Uzunoglu, "Analysis of a Grid Dipole Array placed inside a Waveguide Cavity with a Rectangular Coupling Aperture", International Journal of Numerical Modeling, May 1996.

4. E Moraitakis, M Anagnostou, M Pissas, V Psycharis, D Niarchos and Y. E.Stratakos, "Deposition of YBCO thin films over large areas with a simple sputtering technique for microwave applications", Superconductor Science and Technology, Institute of Physics Publishing, UK.

5. Yorgos E. Stratakos, Paul Bougas, Kostas Gotsis, "A Low Cost, High Accuracy Radar Altimeter", Microwave Journal, February 2000.

6. Dr. Yorgos E. Stratakos, "Design and Development of Special Low Noise Amplifiers for GPS applications", Applied Microwave & Wireless March 2000.

7. Petros S. Tsenes, Dr. Yorgos Stratakos, "Design and Development of a Low Noise Amplifier using Measured Models of Transistors", Applied Microwave Wireless, December 2000.

8. Dimitris Brikas, Dr. Yorgos E. Stratakos, "Design and development of a high power Ka Band Power Amplifier for VSAT applications", Applied Microwave Wireless, October 2001.

9. Dr. Yorgos Stratakos, "Low Cost MMDS Up-Converter for Outdoor applications", Applied Microwave Wireless, April 2002.

10. Petros S. Tsenes, Yorgos E. Stratakos and Nikolaos J. Uzunoglu, "X-Band MMIC Active Mixers", Electronic Component, 2002, Vol.25, pp. 23-46.

11. Petros S. Tsenes, Yorgos E. Stratakos and Nikolaos J. Uzunoglu, "A MMIC QPSK Modulator", Electronic Component, 2002, Vol.25, pp. 47-70.

12. Yorgos Mitropoulos, Yorgos Stratakos, Ilias Tsopelas, "Low Cost UMTS Tower Top Power Amplifier", RF Design Magazine, April issue 2003.

13. Dr. Yorgos E. Stratakos, and Panayotis Betzios, “S-band high power solid state amplifier design and development”, Microwave Journal, vol.47, No. 5, May 2004.

14. Yorgos Stratakos, G. Geroulis, Nikolaos Uzunoglu, "Analysis of Glint Phenomenon in a Monopulse Radar in the Presence of Skin Echo and Non-Ideal Interferometer Echo Signals", JEMWA & PIER, JANUARY 2005.

15. Irene S. Karanasiou, Yorgos Stratakos and Nikolaos Uzunoglu, 'Passive Multiband Microwave Tomography for Intracranial Applications', International Journal of Microwave and Optical Technology, Vol.1, No.2, August 2006.

16. Kostas Stefanou, Dr. Yorgos Stratakos et al, 'Simulating WiMAX System Performance', Microwaves & RF, December 2007.

17. Dr. Yorgos Stratakos, Anastasios Garetsos, Dr. Anastasios Salis, Michalis Sofras, “Advanced UWB GPR Receiver System for waterpipe leaks detection”, Microwaves & RF magazine, October 2008.

18. Nikolaos C. Athanasopoulos, Konstantinos A. Mourtzoukos, Dr. Yorgos E. Stratakos, Rodoula Makri, Nikolaos Uzunoglu, “Development and Testing of a 10GHz Phased Array Cylidrical Antenna Transmitting System incorporating a Least Squares Radiation Pattern synthesis technique”, IEEE Antennas and Propagation Magazine, Vol. 50, No. 6, December 2008, pp. 80-88.

19. Dimitrakellis, Panagiotis, Zeniou Angelos, Stratakos Yorgos, Gogolides Evangelos, "Radio Frequency Atmospheric Plasma Source on a Printed Circuit Board for Large Area, Uniform processing of polymeric materials" by Article reference: PSST-100912.R1, Plasma Sources Science and Technology, January 2016.

Publications in International Conferences Proceedings.

1. GY.E. Stratakos, N.K. Uzunoglu, "Injection Locking Measurements on a mmW Waveguide Gunn Oscillator at 30GHz", 8th ISTET 1995.

2. Y.E. Stratakos, N.K. Uzunoglu, "Design of a MMIC Low Noise Amplifier at 10GHz", 20th International Conference on Microelectronics, IEEE, EDS 12-14 September 1995.

3. G. Papastergiou, S. Matakias, I. Koukouvinos, Y. Stratakos, N. Uzunoglu, "The development of a cost effective Fibre Optic Delay Line", Second GR-I international Conference on New Laser Technology and Applications 1-4 June 1997, Ancient Olympia, Greece.

4. Yorgos E. Stratakos, Nikolaos K. Uzunoglu, "Active Mixer Voltage Controlled Oscillator Chain at 10GHz for down-converter applications", 6th International Conference on Advances in Communications and Control, 23-27 June 1997, Grecotel Imperial, Corfu, Greece.

5. N.K. Uzunoglu, D.I. Kaklamani, Y. E. Stratakos, et al, "On the development of a conformal array system", WORKSHOP COST-260, Dec. 1997.

6. N. K. Uzunoglu, D.I. Kaklamani, Y.E. Stratakos, et al., "Design of a Cylindrically Shaped Conformal Array System", 28th European Microwave Conference, 5-9 October 1998, Amsterdam.

7. Dr. Yorgos E. Stratakos, "Design and Development of a Broadband mmW two-stages Feedback Amplifier", ESA Workshop on Millimetre Wave Technology and Applications, antennas, circuits and systems, 27-29 May 1998, Millilab, Espoo, Finland.

8. Dr. Yorgos E. Stratakos, "CAD Design of an Active MMIC Circulator at 21-26 GHz Frequency Band", 28th European Microwave Conference, 5-9 October 1998, Amsterdam.

9. E. Moraitakis, M. Pissas, D. Niarcos and Y. Stratakos, "Performance of passive microwave devices made from thin films of YBa2 Cu3O7-ä superconductor", presented in EUCAS'99,14-17/9/99 Barcelona, Spain.

10. K.Z Pekmestzi, Y.E. Stratakos, P. Bougas, K. Gotsis, "A High Accuracy and Low Cost Radar Altimeter", Proceedings of the 7th International Conference on Optimization of Electrical and Electronic Equipment, OPTIM 2000, May 2000.

11. Petros S. Tsenes, Dr. Yorgos E. Stratakos, Prof. Nikolaos K. Uzunoglu, Dr. Mixalis Lagadas, G. Deligeorgis, "An X-Band MMIC Down-Converter", WOCSDICE 2000, 24th Workshop ¥n Compound Semiconductor Devices and Integrated Circuits held in Europe, May 29th-June 2nd 2000.

12. Petros S. Tsenes, Dr. Yorgos E. Stratakos, Prof. Nikolaos K. Uzunoglu, Dimitris Brikas, Ioannis Giouzelis, "CAD-simulation results of an X-Band MMIC Up-Converter", WOCSDICE 2000, 24th Workshop on Compound Semiconductor Devices and Integrated Circuits held in Europe, May 29th-June 2nd 2000.

13. C.S. Koukourlis, G.A. Kyriacou, Mavrides S.G., Diamantis S.K., Spyridakis, Th. Kaifas, J.N.Sahalos, Y. Stratakos, P. Tsenes and N. Uzunoglou, "Design and Development of an Active Printed Cylindrical Antenna Array for Radar Applications", URSI, August 2002.

14. Vangelis S. Angelopoulos, Yorgos E. Stratakos, Nikolaos K. Uzunoglu, Dimitra Kaklamani, "Multiband miniature coplanar waveguide antennas for GPRS-802.11b and 802.11b-802.11a wireless applications", WCNC 2003, New Orleans Louisiana, USA, March 2003.

15. Matthaios Bimpas, Nikolaos Paraskevopoulos, Yorgos Stratakos, Nikolaos Uzunoglu, "Design and Development of a Miss-Distance Measurement Two-Frequency Radar Sensor", International Radar Symposium (IRS 2003), September 2003, Dresden Germany.

16. Sotiris Bantas, Yorgos Stratakos; Nick Kanakaris, Yorgos Katsoulis, Pandelis Papadopoulos, Michael Margaras, Vicky Korou, Yorgos Koutsoyannopoulos, Hamed Peyravi, "Architecture Considerations and integrated-passives-based design for a dual-mode GPRS-WLAN SiGe RF transceiver", VTC 2003 Fall Orlando USA.

17. D.G Lymperopoulos, M.Bibas, Y. Stratakos, D.I. Kaklamani, N.K. Uzunoglu, "Detection of Water Leaks In Supply Pipes Using Wideband FM-CW Radar: ¥lectromagnetic Modelling", PIERS 2004, Progress in Electromagnetic Research Symposium, March 28-31, 2004, Pisa Italy.

18. D. Lymperopoulos, M. Bimpas, Y. Stratakos, I. Karanasiou and N. Uzunoglu, 'Detection of Water Leaks in Supply Pipes by Using Microwave Ground Penetrating and Thermography Techniques', 3rd It. Conf. on Non-Destructive Testing of the Hellenic Society for NDT, Vol. 1, pp. 330, Oct. 2003, Crete, Greece.

19. D.G. Lymperopoulos, M.Bimpas, Y. Stratakos, N. Paraskevopoulos, D.I. Kaklamani and N. Uzunoglu, 'Detection of Water Leaks in Supply Pipes with Active Microwave GPR Sensors and Electromagnetic Modelling', Proceedings of the URSI International Symposium on Electromagnetic Theory (URSI EMTS 2004), Vol.1, pp. 111-113, Pisa, Italy, 23-27 May 2004

20. D.G Lymperopoulos, M.Bimpas, Y. Stratakos, et al, 'Detection of Water Leaks in Supply Pipes using a combination of Wide-Band FMCW Radar, CW Radar and Electromagnetic Modelling', International Conference on Information and Automation, ICIA2005.

21. M.Bimpas, A. Amditis, Y. Stratakos et al, 'Development of an Ultra-Sensitive Continuous Wave Radar to Detect Trapped Alive Humans under Building Ruins', International Conference on Information and Automation, ICIA2005.

22. Evangelia Karagianni, Yorgos E. Stratakos, Christos N. Vazouras, Michael E. Fafalios, “Design and Fabrication of a Microstrip Hairpin-line filter by appropriate adaptation of stripline techniques”, ISMOT 2007, Dec 17-21 Roma, Italy.

23. M. Pozzi, D. Zonta, D. Trapani, A. J. Amditis, M. Bimpas, Y. E. Stratakos and A. D. Garetsos, MEMS-based sensors for post-earthquake damage assessment, DAMAS 2011 conference, July 11-13, 2011.

24. Yorgos Stratakos, Thanassis Misaridis, Anastassios Sallis, Michael Sofras, Nikolaos Uzunoglu, “Waterpipe: a ground penetrating imaging radar for water pipeline rehabilation”, SENSORS AND ELECTRONICS TECHNOLOGY, on Ultra Wideband Radar Systems, Toulouse 27-31 October 2008.

25. Amditis A., Stratakos Y., Bairaktaris D., Bimpas M, Camarinopolos S., Kalidromitis V., Pozzi M., Santana J., Saillen N., Torfs T., Ulieru D., Wenk B., Zonta D., “Wireless sensor network for seismic evaluation of concrete buildings”, 14th European Conference on Earthquake Engineering (14ECEE), Ohrid, FYROM, 30 Aug - 03 Sep, 2010.

26. Daniele Zonta, Davide Trapani, Federico Larcher, Angelos Amditis,Matthaios Bimpas, Nicolas Bertsch, Juan Santana, Yorgos Stratakos, Tom Torfs, Nicolas Saillen, Dimitru Ilieru, “Laboratory validation of MEMS-based sensors for after-earthquake damage assessment”, Sep 13-15, 2011, Stanford, CA, USA, IWSHM conference.

27. Rodoula Makri, Petros Tsenes, Dimitrios Economou, Yannis Papananos, Dimitrios Dervenis, Michael Birbas, John Kikidis, Vassilis Paliouras, Grigorios Kalivas, Alexis Birbas, Panos Karaivazoglou, Yorgos Stratakos, John Korinthios, Stelios Siskos, Alkis Xatzopoulos, John Komninos, Serafeim Katsikas, Konstantinos Voudouris, Andreas Rigas, George Agapiou and Polivios Raxis, Next Generation millimeter wave backhaul radio:Overall system design GbE 60GHz PtP wireless radio of high CMOS integration, 18th IEEE International Conference on Electronics, Circuits and Systems (ICECS), 2011, Beirut Lebanon, December 11-14 2011.

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