João José Lopes da Costa Freire

João Costa Freire

Academic position:	Associate Professor
Joining date:	01-01-1999
Roles in IT:	Senior Researcher
Thematic Line:	Wireless Technologies
Group:	Wireless Circuits – Lx

Email: Send Email
Address: IT – Lisboa
Instituto Superior Técnico - Torre Norte - Piso 10
Av. Rovisco Pais, 1
1049 - 001 Lisboa
Tel: +351 21 841 84 54
Fax: +351 21 841 84 72

Scientific Achievements

Degrees

Agregação, Instituto Superior Técnico, 05-12-1992
PhD, Instituto Superior Técnico, 04-07-1984
Licenciatura, Instituto Superior Técnico, 30-03-1975

Affiliations

Instituto Superior Técnico, 01-04-1975, Associate Professor

Academic Activities

6Lecture courses

Análise de Circuitos (Circuit Analysis), Instituto Superior Técnico, Lic. Engenharia Electrotécnica e Computadores

Sistemas Electrónicos das Telecomunicações, Instituto Superior Técnico, Lic. Engenharia Electrotécnica e Computadores

Electronica I, Instituto Superior Técnico, Mestrado em Eng. Electr. e Computadores

Electrónica Rápida, Instituto Superior Técnico, Mestrado em Eng. Electr. Computadores

Teoria de Circuitos e Fundamentos de Electrónica, Instituto Superior Técnico, Licenciatura em Ciências de Engenharia - Engenharia de Redes de Comunicações

Circuit Theory and Fundamentals of Electronics, Instituto Superior Técnico, Telecommunication Network Engineering

2Supervision of PhD theses

As Supervisor

Active Inductors in CMOS: design and applications, PhD Student, Mrinalinee Pandey, Defended 02-2020
Modelling and Characterization of Passive Structures on Silicon Technologies, PhD Student, Mário Jorge Simão de Assunção, Defended 06-2015

2Supervision of MSc theses

As Supervisor

Design of a 130 nm CMOS Grounded Active Inductor up to X-Band, MSc Student, Mrinalinee Pandey, Concluded 05-2014
SiGe 30GHz Active Inductor Based on Cascode Gyrator, MSc Student, Joaquim José da Costa Ferreira, Concluded 03-2012

Publications

14Papers in Journals

J. Torres, J. Costa Freire, 30 GHz SiGe active inductor with voltage controlled Q, Integration, the VLSI Journal, Vol. 77, No. 3, pp. 13 - 24, March, 2021,
| Abstract | BibTex
M. Pereira, J. T. Sousa, J. Costa Freire, J. Vaz, A 1.7-mW -92-dBm Sensitivity Low-IF Receiver in 0.13-μm CMOS for Bluetooth LE Applications, IEEE Transactions on Microwave Theory and Techniques, Vol. 67, No. 1, pp. 332 - 346, January, 2019 | BibTex
M. Pereira, J. Vaz, C.A. Leme, J. Costa Freire, Gain Compression Improvement on Low-Power Cascaded Current Reuse LNAs, International Journal of Circuit Theory and Applications, Vol. 44, No. 10, pp. 1767 - 1779, October, 2016,
| Abstract | BibTex
M. Pandey, A. Canelas, R. P. Póvoa, J. Torres, J. Costa Freire, N. Lourenço, N. Horta, Design and application of a CMOS active inductor at Ku band based on a multi-objective optimizer, Integration, the VLSI Journal, Vol., No., pp. -, September, 2016 | BibTex
M. Pereira, J. Vaz, C.A. Leme, J. T. Sousa, J. Costa Freire, A 170-μA All-Digital GFSK Demodulator with Rejection of Low SNR Packets for Bluetooth-LE, IEEE Microwave and Wireless Components Letters, Vol. 26, No. 6, pp. 452 - 454, June, 2016,
| Abstract | BibTex
J. Torres, J. Costa Freire, K band SiGe HBT single ended active inductors, Integration, the VLSI Journal, Vol. 52, No. 1-380, pp. 272 - 281, January, 2016,
| Abstract | Full text (PDF 3 MBs) | BibTex
M. Assunção, P. M. Santos, J. Costa Freire, A Technique to Reduce On-Wafer Measurement Uncertainty for CMOS Transmission Line Characterization, IEEE Microwave and Wireless Components Letters, Vol. PP, No. 99, pp. 1 - 3, November, 2015 | BibTex
R. Sorrentino, J. Costa Freire, Microwaves in Europe, IEEE Transactions on Microwave Theory and Techniques, Vol. 50, No. 3, pp. 1056 - 1072, March, 2002 | BibTex
J. Torres, J. Costa Freire, Monolithic Transistors SPST Switch for L-Band, IEEE Transactions on Microwave Theory and Techniques, Vol. 50, No. 1, pp. 51 - 56, January, 2002 | BibTex
J. Vaz, J. Costa Freire, Millimeter-Wave Monolithic Power Amplifier for Mobile Broadband System, IEEE Transactions on Microwave Theory and Techniques, Vol. 49, No. 6, pp. 1211 - 1215, June, 2001 | BibTex
K. K. Tan, G.M. Marques, J. Vaz, J. Costa Freire, MMIC Lumped and Transversal Filter with LC Tuned Amplifiers, Microwave Engineering Europe, Vol. 1, No. 11, pp. 57 - 61, November, 1999 | BibTex
M. I. Simas, J. Costa Freire, CAD Tools to Optimize Power MOSFETs Performance Using Channel Reverse Conduction, IEEE Transactions on Power Electronics, Vol. 9, No. 5, pp. 522 - 531, September, 1994 | BibTex
M. Rosário, J. Costa Freire, Desing os MESFET Mixers for Maximum Conversion Gain, IEEE Transactions on Microwave Theory and Techniques, Vol. 38, No. 12, pp. 1972 - 1979, December, 1990 | BibTex
M. I. Simas, J. Costa Freire, M. S. Piedade, Experimental Characterization of Power VDMOS Transistors in Commutation and Derived Model for CAD, IEEE Transactions on Power Electronics, Vol. 4, No. 3, pp. 371 - 378, July, 1989 | BibTex

24Papers in Conferences

M. Pandey, A. Canelas, R. P. Póvoa, J. Torres, J. Costa Freire, N. Lourenço, N. Horta, Grounded Active Inductors Design Optimization for FQmax = 14.2 GHz using a 130 nm CMOS Technology, International Conf. on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design - SMACD, Istanbul, Turkey, Vol. -, pp. 1 - 4, September, 2015 | BibTex
M. Pereira, J. Vaz, C.A. Leme, J. T. Sousa, J. Costa Freire, An Ultra-Low Power Low-IF GFSK Demodulator for Bluetooth-LE applications, IEEE International Symp. on Circuits and Systems - ISCAS, Lisbon, Portugal, Vol. 1, pp. 1226 - 1229, May, 2015,
| Abstract | BibTex
M. Assunção, J. Costa Freire, P. M. Santos, Lumped Model for CMOS Interconnections lines, Conf. on Telecommunications - ConfTele, Castelo Branco, Portugal, Vol. 1, pp. 21 - 24, May, 2013,
| Abstract | Full text (PDF 959 KBs) | BibTex
V. Canosa, M. Pereira, P. Gomes, J. Vaz, J. Costa Freire, Fully Integrated Switched Dual-Band CMOS LNA for 802.11b/g WLAN and WiMAX applications, European Microwave Integrated Circuits - EuMIC, Amsterdam, Netherlands, Vol., pp. 397 - 400, October, 2012,
| Abstract | BibTex
V. Canosa, M. Pereira, P. Gomes, J. Vaz, J. Costa Freire, Fully integrated switched dual-band CMOS LNA for 802.11b/g WLAN and WiMAX applications, European Microwave Integrated Circuits - EuMIC, Amsterdam, Netherlands, Vol., pp. 397 - 400, October, 2012 | BibTex
R. F. Ribeiro Ribeiro, L. Mendes, J. Vaz, M. Rosário, J. Costa Freire, A 130 nm CMOS LNA for 30 GHz Applications, Conf. on Telecommunications - ConfTele, Lisbon, Portugal, Vol. --, pp. -- - --, April, 2011 | BibTex
J. Torres, J. Costa Freire, SiGe MMICs with Spiral Inductors up to millimetre waves, Conf. on Telecommunications - ConfTele, santa Maria da Feira, Portugal, Vol. 1, pp. 0 - 1, May, 2009,
| Abstract | BibTex
J. Torres, J. Costa Freire, SiGe 30GHz active inductor based on cascode gyrator, Asia Pacific Microwave Conf. - APMC, Hong kong, Hong Kong, Vol. C4-09, pp. no page - no page, December, 2008,
| Abstract | BibTex
J. Torres, J. Costa Freire, Ku band voltage controlled oscillator on SiGe, Macau, China, Vol. 1, pp. 0 - 1, November, 2008,
| Abstract | BibTex
J. Torres, J. Vaz, J. Costa Freire, 30GHz Amplifiers with 0.25ƒÝm SiGe BiCMOS, IEEE International Conf. on Electronics, Circuits and Systems, marrakesh, Morocco, Vol. I, pp. 0 - 0, December, 2007 | BibTex
J. Torres, J. Costa Freire, SiGe:C BiCMOS Monolithic Millimeter Wave Integrated Circuits, Conf. on Design of Circuits and Integrated Systems, Sevilha, Spain, Vol. I, pp. 0 - 0, November, 2007 | BibTex
J. Torres, J. Costa Freire, Broad band Amplifier up to 30GHz with 0.25um SiGe technology, International Microwave and Optoelectronics Conf. - IMOC, Salvador, Brazil, Vol. I, pp. 166 - 169, October, 2007 | BibTex
J. Torres, J. Costa Freire, SiGe Inductorless Low Noise Amplifiers up to 30GHz, Conf. on Telecommunications - ConfTele, LIsbon, Portugal, Vol. 1, pp. 133 - 136, May, 2007 | BibTex
G. St´Aubyn, J. Vaz, J. Costa Freire, Voltage Controlled Phase Shifters on CMOS Technology, Asia Pacific Microwave Conf. - APMC, Yokohama, Japan, Vol. 1, pp. 1 - 1, December, 2006 | BibTex
J. Costa Freire, F. Fortes, R. Mahmoudi, A. Roermund, SiGe Monolithic LNAs for LMDS, Conf. on Design of Circuits and Integrated Systems, Lisboa, Portugal, Vol. abstracts, pp. 186 - 186, November, 2005 | BibTex
F. Fortes, J. Costa Freire, D. Leenaerts, R. Mahmoudi, A. Roermund, A 28.5GHz Monolithic Cascode LNA with 70GHz fT SiGe HBTs, European Solid-State Circuits, Grenoble, France, Vol. 1, pp. 93 - 96, September, 2005 | BibTex
M. Rosário, C. Peixeiro, S. Blaisot, P. Alleaume, J. Schrotg, T. Mueller, J. Costa Freire, Millimetre Wave Defected Ground Planar Filters on LTCC, Asia Pacific Microwave Conf. - APMC, New Delhi, India, Vol., pp. 818 - 819, December, 2004 | BibTex
J. Vaz, M. Rosário, J. Costa Freire, Low Cost Si MMIC Design for RF Front Ends, Asia Pacific Microwave Conf. - APMC, New Delhi, India, Vol., pp. 1 - 2, December, 2004 | BibTex
J. Costa Freire, R. Mahmoudi, A. Roermund, 30GHz SiGe Monolithic LNA, SPIE, Veldhoven, Netherlands, Vol. 1, pp. 115 - 119, November, 2004 | BibTex
M. Rosário, C. Peixeiro, S. Blaisot, P. Alleaume, J. Schrotg, T. Mueller, J. Costa Freire, Design and Optimization of mmW Defect Ground Planar Filters on LTCC, International Workshop on Microwave Filters, Toulouse, France, Vol., pp. 110 - 112, September, 2004 | BibTex
M. Rosário, F. Le-Strat, P. Alleaume, J. Vaz, J. Schrotg, T. Mueller, J. Costa Freire, Low Cost LTCC Filters for a 30GHz Satellite System, European Microwave Conf. - EMC, Munique, Germany, Vol. 1, pp. 817 - 820, October, 2003 | BibTex
F. Azevedo, M. Rosário, J. Costa Freire, CMOS Monolithic Wideband Image rejection Mixer With Polyphase Filters, Brazilian Microwave and Optolectonic Symp., Iguazu Falls, Brazil, Vol. 2, pp. 815 - 818, September, 2003 | BibTex
F. Azevedo, M. Rosário, J. Costa Freire, Understanding and Enhancing CMOS Monolithic Image-Rejection Mixers, Asia Pacific Microwave Conf. - APMC, Kyoto, Japan, Vol. 2, pp. 2372 - 2376, November, 2002 | BibTex
F. Azevedo, M. Rosário, J. Costa Freire, Effects of Mismatch on CMOS Monolithic Mixers Image Rejection, IEEE International Symp. on Personal, Indoor and Mobile Radio Commun - PIMRC, Lisbon, Portugal, Vol. 5, pp. 2372 - 2376, September, 2002 | BibTex

Projects

Currently running projects1

Acronym	Name	Funding Agency	Start date	Ending date
WSN_EM	Wireless Sensor Network for Environmental Monitoring	FCT	01-09-2018	31-08-2022

Closed Projects8

Acronym	Name	Funding Agency	Start date	Ending date
ACTFIL	Active filters	IT/LA	01-01-2004	31-12-2005
AILAIA	Smart Active Printed Antennas	CRUP	01-01-2007	31-12-2008
AME	Advanced Microelectronics Engineering	ICEP	01-10-2002	22-10-2003
GALACTIC	Innovative GaAs MMICs and Avanced LTCC packaging technologies for multicomponents Ka Band subsystems	EU	01-01-2002	31-12-2004
IRFDCMOS	Integration of high-frequency dc-dc converters in RF CMOS SoC	IT/LA	01-09-2005	01-06-2008
NLRFCMOS	Desenvolvimento de modelos não lineares de dispositivos para microondas e integração monolítica de circuitos não lineares em silício para telecomunicações	CRUP	01-01-2003	31-12-2004
SiGeM	Silicon Germanium MMICs for RF Front End Transceivers	IT/LA	01-10-2005	01-07-2008
SiMTraMil	Silicon Monolithic Transceiver for Portable Communication Systems in Millimetre Wave	FCT/PTDC	01-03-2010	01-11-2012

Other Scientific Achievements

1Awards

J. Costa Freire, G.M. Marques, W. Tam, J. Vaz, MMIC Lumped and Transversal Filter with LC Tuned Amplifiers, Best Poster at GAAS'99 (, 05-10-1999

4Miscellaneous

J. Costa Freire, IEEE Region 8 Committee, Member of Technical Committee, Chairman of Educational Activities Subcommittee, 01-01-2009
J. Costa Freire, PhD Jury at IST, PhD Thesis Jury, Jerzy Guterman, 01-09-2008
J. Costa Freire, Chair of MSc Jury at IST, MSc Thesis Jury, João Vinagre, 01-07-2008
J. Costa Freire, IEEE Portugal Section, National Delegate, 01-06-2008

2Short Courses and Seminars

J. Costa Freire, 30GHz SiGe MMICs for RF Front End Transceivers, China, Macau, 12-2008
J. Costa Freire, QUBIC4G Monolithic LNAs for 30GHz, Netherlands, Eindhoven, 05-2004

Other Contributions

13Conference Committees

Conf. on Telecommunications - ConfTele, Conference Chairman, 2011
Conf. on Telecommunications - ConfTele, Conference Chairman, 2011
Mediterranean Microwave Symp. - MMS, Technical Programme Committee, 2010
International Conf. on Telecommunications - ICT, Technical Programme Committee, 2009
IEEE International Engineering Management Conf. - IEMC Europe, Organizing Committee, 2008
IEEE MTT-S International Microwave Worshop Series (IMWS) on Art of Miniaturizing RF and Microwave Passive Components, Technical Programme Committee, 2008
VII Mediterranean Microwave Symposium, Scientific Committee, 2007
International Conf. on Electrical Engineering, Scientific Committee, 2007
VI Mediterranean Microwave Symposium, Scientific Committee, 2006
1st International Conference on Electrical Engineering, Scientific Committee, 2005
XIVèmes Journées Nationales Microondes, Scientific Committee, 2005
XIIIèmes Journées Nationales Microondes, Scientific Committee, 2003
XIIèmes Journées Nationales Microondes, Scientific Committee, 2002

1Refereeing Journals

IEEE Transactions on Microwave Theory and Techniques
2009, 1 review(s);

6Refereeing Conferences

International Conf. on Electrical Engineering
2007, 1 review(s);
Mediterranean Microwave Symp. - MMS
2010, 1 review(s); 2007, 1 review(s);
International Conf. on Telecommunications - ICT
2009, 1 review(s);
IEEE MTT-S International Microwave Worshop Series (IMWS) on Art of Miniaturizing RF and Microwave Passive Components
2008, 1 review(s);
Conf. on Design of Circuits and Integrated Systems
2010, 1 review(s);
2010, 1 review(s); 2008, 1 review(s);

IT Member Profile

João Costa Freire

Scientific Achievements

As Supervisor

As Supervisor

Currently running projects1

Closed Projects8