António Luís Campos da Silva Topa

António Topa

Academic position:	Assistant Professor
Joining date:	03-01-1995
Roles in IT:	Senior Researcher
Thematic Line:	Wireless Technologies
Group:	Antennas and Propagation – 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

http://www.cienciavitae.pt/311E-5C50-E801

https://www.orcid.org/0000-0003-1364-2494

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SCOPUS

19-12-2025

IT Lisbon Meeting - 1st Edition

The Instituto de Telecomunicações - Lisbon Branch organized the IT Lisbon Meeting 2025 - 1st Edition, on December 5th at the Fundação Portuguesa das Comunicações – Museu das Comunicações.

05-08-2025

Instituto de Telecomunicações Continues to Inspire Future Scientists in the 29th Edition of Ciência Viva no Laboratório

Throughout July 2025, IT hosted three dynamic internships specifically designed for students from the 9th to 12th grades, including those in professional education. Held at Instituto Superior Técnico (IST) and the University of Beira Interior (UBI), the workshops immersed participants in cutting-edge areas of Information and Communication Technologies (ICT).

07-08-2024

Exploring Cutting-Edge Technology at the 2024 Ciência Viva no Laboratório

As in previous editions, the Instituto de Telecomunicações (IT) participation in the Ciência Viva no Laboratório initiative continues to shine, offering three engaging internships that underscore the program's success and popularity among students.

22-04-2024

Additive manufacturing: Emerging opportunities for microwave components

Distinguished Microwave Lecture by Cristiano Tomassoni, University of Perugia, Italy

20-12-2021

IEEE Portugal Joint Chapter on Antennas & Propagation - Microwave Theory & Techniques awarded with the "Outstanding Chapter Section Award"

This award is given to the Chapters of IEEE Portugal that stand out in each calendar year.

19-12-2021

IT researchers distinguished with the Research Award and the Best Student Paper Award URSI 2021

Researchers from IT were distinguished within the scope of the 15th Congress of the Portuguese Committee of URSI.

Scientific Achievements

Degrees

PhD, Instituto Superior Técnico, 27-03-1998
MSc, Instituto Superior Técnico, 18-12-1989
Licenciatura, Instituto Superior Técnico, 31-07-1985

Affiliations

Ordem dos Engenheiros, 01-07-1989, Membro
IEEE - Institute of Electrical and Electronics Engineers, 01-05-1989, Member
Instituto Superior Técnico, 04-12-1984, PhD

Academic Activities

26Supervision of MSc theses

As Supervisor

Projecto de uma Rede de Comunicações de Emergência em VHF para o Território Nacional, MSc Student, João Pedro Gonçalves Rodrigues, Concluded 07-2025
Reforço da cobertura celular do Parque Tejo na Jornada Mundial da Juventude 2023 usando Small Cells, MSc Student, Rui Pedro Medeiros Paiva, Concluded 07-2023
Imagem Através da Parede (TWI) com Radar de Abertura Virtual, MSc Student, Ana Maria Azinheiro Catarino, Concluded 11-2022
Compressão de Impulsos de Radar com Filtros Adaptados, MSc Student, Rui Pedro Carreiras Sustelo, Concluded 01-2022
Planeamento Rádio LTE em Ambiente Rural, MSc Student, Pedro Miguel Roque Nobre, Concluded 07-2021
Mitigação das Limitações do Radar de Abertura Sintética, MSc Student, Afonso Roque Rodrigues Martins Duarte, Concluded 05-2021
Projecto de Redes de Fibra Óptica: Uma perpectiva vinda do terreno, MSc Student, Ivo Rafael Martins de Almeida Morgado Cortez, Concluded 05-2021
Reconhecimento de Alvos usando o Efeito Doppler, MSc Student, Pedro Fragoso Garrido de Matos Lino, Concluded 02-2021
Projecto de Filtros de Microondas para Sistemas de Radar, MSc Student, André Alexandre Romero Ribeiro da Silva, Concluded 10-2020
Projeto de uma Rede de Backhaul para Monitorização de Incêndios Florestais na Ilha da Madeira, MSc Student, Ricardo Paixão dos Santos Henriques, Concluded 10-2020
Melhoria da cobertura da rede móvel na região autónoma da Madeira, MSc Student, Alexandre Miguel Pita Gaspar, Concluded 07-2020
Design, Manufacture and Testing of Microstrip Filters, MSc Student, Vasco Quartin Bastos de Almeida de Carvalho, Concluded 07-2020
Design and Optimization for Mobile Networks in Stadium Environments, MSc Student, Carolina Pereira Lopes, Concluded 11-2019
Projeto de uma Rede de Emergência e Segurança para a Região Autónoma dos Açores, MSc Student, Daniel Romeu Botelho Rebelo, Concluded 11-2019
Projeto de Sistemas de Apoio à Navegação no Espaço Aéreo Português, MSc Student, Sara Alexandre Rodrigues, Concluded 11-2019
Design, Manufacture and Testing of Microstrip Directional Couplers, MSc Student, Salvador Vasques Seabra Águas, Concluded 06-2019
Análise das Características Temporais de Sinais Musicais, MSc Student, Diana Raquel Piteira Félix, Concluded 11-2018
Sistemas de Comunicações Marítimos em Cabo Verde, MSc Student, Neusa de Lourdes Alves Varela, Concluded 11-2018
Sistemas de Radar Automóvel Integrados, MSc Student, Rafael de Jesus Gamito Afonso da Palma, Concluded 11-2018
Sistemas de Comunicações de Emergência via Ionosfera, MSc Student, Rafael Dias Grou, Concluded 06-2018
Theorectical model assessment for indoor propagation, MSc Student, João Nuno Monteiro Avó Fole, Concluded 11-2015
Attenuation estimation in a ionospheric link, MSc Student, Inês Martins Manique, Concluded 10-2015
Gesture recognition through the reflection of electromagnetic waves, MSc Student, José Maria Caramelo Garcia, Concluded 07-2015
Chiral Optical Fibres and Gratings, MSc Student, Gonçalo José da Silva Pimenta, Concluded 06-2015
Mittigation techniques for radar clutter , MSc Student, Luís Filipe Santos de Almeida, Concluded 06-2015
Acousto-optic interaction and application to signal processing, MSc Student, Miguel Esteves Fernandes, Concluded 06-2015

Publications

4Books Chapters

A. Topa, C. R. Paiva, A. Barbosa, Dispersion and losses in metamaterial DNG H-guides, Chapter in, Metamaterials and Plasmonics: Fundamentals, Modelling and Applications, S. Zouhdi, A. Sihvola, and A. Vinogradov, Springer, 2009
A. Topa, C. R. Paiva, A. Barbosa, Electromagnetic Wave Propagation in Omega Waveguides:Discrete Complex Modes and Application to a Ridge Waveguide, Chapter in, Progress in Electromagnetic Research, J. A. Kong, EMW Publishing, Cambridge, Massachussets, 2004
A. Topa, C. R. Paiva, A. Barbosa, Surface and Leaky Modes of Multilayered Omega Structures, Chapter in, Advances in Electromagnetics of Complex Media and Metamaterials, Saïd Zouhdi, Ari Sihvola, and Mohamed Arsalane, Kluwer Academic, Dordrecht, Netherlands, 2002
A. Topa, C. R. Paiva, A. Barbosa, Complete Spectral Representation for the Electromagnetic Field of Planar Multilayered Waveguides Containing Pseudochiral Omega Media, Chapter in, Progress In Electromagnetic Research, J. A. Kong, EMW Publishing, Cambridge, Massachussets, 1998

17Papers in Journals

S. Maslovski, H. F. Ferreira, I. Medvedev, N. Brás, A. Abraray, T. Fernandes, H. A. Silva, A. Topa, Conjugate impedance matched metamaterials: Physical modeling and wave interaction effects, Journal of Physics: Conference Series, Vol. 1092, No. 012084, pp. 1 - 4, September, 2018 | BibTex
I. V. Neves, A. Topa, M. Neves, Waveguide Dispersion in a Strongly Biaxial Anisotropic Fiber: An Analytical Solution, Journal of Lightwave Technology, Vol. 30, No. 14, pp. 2262 - 2270, July, 2012,
| Abstract | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Electromagnetic Wave Propagation in Chiral H-Guides, Progress in Electromagnetics Research, Vol. PIER 103, No. 103, pp. 285 - 303, April, 2010 | Full text (PDF 785 KBs) | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Guidance and Leakage Behavior of Uniaxial Ridge Waveguides, Journal of Electromagnetic Waves and Applications, Vol. 23, No. 13, pp. 1675 - 1684, September, 2009,
| Abstract | Full text (PDF 270 KBs) | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Novel propagation features of double negative H-guides and H-guide couplers, Microwave and Optical Tech. Letters, Vol. 47, No. 2, pp. 185 - 190, October, 2005 | Full text (PDF 141 KBs) | BibTex
F. M. Janeiro, C. R. Paiva, A. Topa, Guidance and leakage properties of chiral optical fibers, Journal of the Optical Society of America B: Optical Physics, Vol. 19, No. 11, pp. 2558 - 2566, November, 2002 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Complex Eigenmodes in Planar Waveguides with Pseudochiral Omega Media, Izvestiya Gomel'skogo Gosundarstvennogo Universitet, Vol. 9, No. 6, pp. 84 - 88, November, 2001 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Least Squares Boundary Residual Method for the Analysis of Step Discontinuities in Open Chiral Waveguides, AEU - International Journal of Electronics and Communications, Vol. 55, No. 4, pp. 281 - 291, July, 2001 | BibTex
W. Weiglhofer, A. Barbosa, A. Topa, Guest Editorial, AEU - International Journal of Electronics and Communications, Vol. 55, No. 4, pp. 209 - 210, July, 2001 | BibTex
C. R. Paiva, A. Topa, A. Barbosa, Influence of intermodal dispersion on the switching of solitons at different wavelengths in twin-core fiber couplers, Journal of the Optical Society of America B: Optical Physics, Vol. 16, No. 10, pp. 1636 - 1641, October, 1999 | Full text (PDF 141 KBs) | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Propagation Characteristics of the Rectangular Waveguide Inhomogeneously Filled with Uniaxial Omega Media, IEICE Transactions on Electronics, Vol. E82-C, No. 7, pp. 1166 - 1171, July, 1999 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Full-Wave Analysis of a Nonradiative Dielectric Waveguide with a Pseudochiral Omega Slab, IEEE Transactions on Microwave Theory and Techniques, Vol. 46, No. 9, pp. 1263 - 1269, September, 1998,
| Abstract | Full text (PDF 246 KBs) | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Complete Spectral Representation for the Electromagnetic Field of Planar Multilayered Waveguides Containing Pseudochiral Omega Media - Abstract, Journal of Electromagnetic Waves and Applications, Vol. 12, No. 3, pp. 349 - 350, March, 1998 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, New Biorthogonality Relations for Inhomogeneous Biisotropic Planar Waveguides, IEEE Transactions on Microwave Theory and Techniques, Vol. 42, No. 5, pp. 629 - 634, April, 1994 | BibTex
C. R. Paiva, A. Topa, A. Barbosa, Novel propagation features of dielectric planar chirowaveguides due to nonreciprocity, Microwave and Optical Tech. Letters, Vol. 6, No. 3, pp. 182 - 185, March, 1993 | BibTex
C. R. Paiva, A. Topa, A. Barbosa, Semileaky waves in dielectric chirowaveguides, Optics Letters, Vol. 17, No. 23, pp. 1670 - 1672, December, 1992 | Full text (PDF 354 KBs) | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Rigorous Analysis of a Step Discontinuity in a Dielectric Planar Anisotropic Waveguide, Microwave and Optical Tech. Letters, Vol. 5, No. 11, pp. 602 - 606, October, 1992 | BibTex

80Papers in Conferences

P. Sustelo, A. Topa, Modeling of Radar Pulse Compression Using Adapted Filters, EIEC Encuentro Iberico de Electromagnetismo Computacional EIEC, Cádiz, Spain, Vol., pp. -, November, 2023 | Full text (PDF 198 KBs) | BibTex
A. Duarte, A. Topa, Synthetic Aperture Radar Imagery using SOCET GXP®, EIEC Encuentro Iberico de Electromagnetismo Computacional EIEC, Núria (Girona), Spain, May, 2022,
| Abstract | Full text (PDF 2 MBs) | BibTex
P. Lopes, A. Topa, Design and Optimization for Mobile Networks in Stadium Environments, Encuentro Ibérico de Electromagnetismo Computacional - EIEC, Santander, Spain, October, 2019 | Full text (PDF 48 KBs) | BibTex
B. Rebelo, A. Topa, Public Protection and Disaster Relief network for the eastern group, Encuentro Ibérico de Electromagnetismo Computacional - EIEC, Santander, Spain, October, 2019 | Full text (PDF 106 KBs) | BibTex
S. Maslovski, T. Fernandes, N. Brás, H. A. Silva, A. Topa, Energy harvesting with conjugate-impedance matched metamaterials, Progress in Electromagnetics Research Symp. - PIERS, St. Petersburg, Russia, Vol. -, pp. 1449 - 1449, May, 2017 | BibTex
A. Topa, Mode Orthogonality in Metamaterial waveguides, Encuentro Ibérico de Electromagnetismo Computacional - EIEC, Oviedo, Spain, Vol. 1, pp. 1 - 1, November, 2016 | Full text (PDF 8 KBs) | BibTex
M. Garcia, A. Topa, Gesture Recognition by Electromagnetic-Wave Reflection, Encuentro Ibérico de Electromagnetismo Computacional - EIEC, Baeza, Spain, Vol. 1, pp. 1 - 2, May, 2015,
| Abstract | BibTex
A. Topa, Linear-Operator Theory for Inhomogeneous Omega Planar Waveguides, Progress in Electromagnetics Research Symp. - PIERS, Stockholm, Sweden, Vol. 1, pp. 1 - 1, August, 2013,
| Abstract | BibTex
A. Topa, Recent Advances on the Analysis and Design of Metamaterial Waveguides, Encuentro Ibérico de Electromagnetismo Computacional - EIEC, Dénia, Spain, Vol. 1, pp. 1 - 1, May, 2013,
| Abstract | BibTex
A. Topa, Metamaterial Waveguides, URSI Seminar of the Portuguese Committee, Lisboa, Portugal, Vol. 1, pp. 1 - 1, November, 2012,
| Abstract | BibTex
A. Topa, Linear Operator Formalism in the Analysis of Omega Planar Layered Waveguides, WASET International Conf. on Electrical, Computer, Electronics and Communication Engineering - ICECECE, Paris, France, Vol. 1, pp. 1 - 1, August, 2012 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Recent Investigation on Indefinite Medium Waveguides, Encuentro Ibérico de Electromagnetismo Computacional - EIEC, Sesimbra, Portugal, Vol. 1, pp. 1 - 1, November, 2011,
| Abstract | BibTex
A. Topa, Full-Wave Analytical Methods for the Electromagnetic Characterization of Metamaterial Waveguides, International Conf. on Electromagnetics in Advanced Applications - ICEAA, Torino, Italy, Vol. 1, pp. 1 - 1, September, 2011,
| Abstract | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Dispersion Diagrams of Waveguides Filled With Indefinite Media, Conf. on Telecommunications - ConfTele, Lisbon, Portugal, Vol. 1, pp. 1 - 1, April, 2011,
| Abstract | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Electromagnetic Wave Propagation in Waveguides with Indefinite Media, IEEE AP-S/URSI International Symp., Toronto, Canada, Vol. 1, pp. 1 - 1, July, 2010,
| Abstract | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Variable Omega Directional Couplers, Encuentro Ibérico de Electromagnetismo Computacional - EIEC, Cáceres, Spain, Vol. 1, pp. 1 - 1, May, 2010,
| Abstract | BibTex
A. Topa, C. R. Paiva, A. Barbosa, NRD Directional Couplers using Omega Media, NATO Advanced Research Workshop: Metamaterials for Secure Information and Communication Technologies - ARW, Cairo, Egypt, Vol. 1, pp. 1 - 1, February, 2010,
| Abstract | BibTex
A. Topa, C. R. Paiva, A. Barbosa, New NRD-waveguide Devices Using Metamaterials, Progress in Electromagnetics Research Symp. - PIERS, Moscow, Russia, Vol. 1, pp. 1 - 1, August, 2009,
| Abstract | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Leakage, Dispersion and Losses in Omega H-Guides, IEEE AP-S/URSI International Symp., Charleston, United States, Vol. 1, pp. 1 - 1, June, 2009,
| Abstract | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Leaky Mode Dispersion in Omega NRD Waveguides, Conf. on Telecommunications - ConfTele, Vila da Feira, Portugal, Vol. 1, pp. 1 - 1, May, 2009,
| Abstract | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Metamaterial Dispersion and Loss in a Double Negative Nonradiative Dielectric Waveguide, IEEE CONVENTION OF ELECTRICAL AND ELECTRONICS ENGINEERS IN ISRAEL, Eilat, Israel, Vol., pp. - - -, December, 2008,
| Abstract | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Guided Waves in Metamaterials, URSI Seminar of the Portuguese Committee, Lisboa, Portugal, Vol., pp. - - -, November, 2008,
| Abstract | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Guided Waves in Metamaterial Three-dimensional Waveguides, Encuentro Ibérico de Electromagnetismo Computacional - EIEC, Cádiz, Spain, Vol., pp. 1 - 1, October, 2008,
| Abstract | BibTex
A. Topa, C. R. Paiva, A. Barbosa, The effect of material dispersion in omega nonradiative dielectric waveguides, URSI General Assembly, Chicago, United States, Vol. 1, pp. 1 - 1, August, 2008,
| Abstract | BibTex
A. Topa, C. R. Paiva, A. Barbosa, The effect of metamaterial losses in DNG H-guide performance, NATO Advanced Research Workshop: Metamaterials for Secure Information and Communication Technologies - ARW, Marrakesh, Morocco, Vol. 1, pp. 569 - 569, May, 2008 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Proper Leaky Modes in DNG Ridge Waveguides, Progress in Electromagnetics Research Symp. - PIERS, Prague, Czech Republic, Vol. 1, pp. 1 - 4, August, 2007 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Dispersive Leaky-Mode Propagation in Metamaterial Nonradiative Dielectric Waveguides, IEEE AP-S/URSI International Symp., Honolulu, United States, Vol. 1, pp. 1 - 4, June, 2007 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Propagation Analysis of Chiral H-Guides, Conf. on Telecommunications - ConfTele, Peniche, Portugal, Vol. 1, pp. 5 - 8, May, 2007 | BibTex
R. Rosa, P. Oliveira, A. Topa, C. A. Fernandes, Visualization Tool for the Propagation of Electromagnetic Waves, Conf. on Telecommunications - ConfTele, Peniche, Portugal, Vol. 1, pp. 93 - 96, May, 2007 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Assessment of the Effective Index Method in the Analysis of DNG Metamaterial Waveguides, Encuentro Ibérico de Electromagnetismo Computacional - EIEC, Barcelona, Spain, Vol. 1, pp. 1 - 4, April, 2007 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Electromagnetic-Wave Propagation in Chiral H-Guides, USNC/URSI National Radio Science Meeting, Albuquerque, United States, Vol. 1, pp. 1 - 1, July, 2006 | BibTex
João R. Canto, S.A. Matos, A. Topa, C. R. Paiva, Comportamento Dispersivo de Modos Leaky em Guias Metamateriais DNG, Encuentro Ibérico de Electromagnetismo Computacional - EIEC, Seia, Portugal, Vol. 1, pp. 29 - 32, September, 2005 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, DNG-NRD Directional Couplers, Progress in Electromagnetics Research Symp. - PIERS, Hangzhou, China, Vol. 1, pp. 115 - 115, August, 2005 | BibTex
F. M. Janeiro, A. Topa, C. R. Paiva, Surface and Leaky Modes in a Symmetric DPS-DNG Slab, IEEE AP-S/URSI International Symp., Washington, United States, Vol. -, pp. - - -, July, 2005 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Mode Coupling in Parallel DNG/DPS H-Guides: A Full-wave Analysis, USNC/URSI National Radio Science Meeting, Washington, United States, Vol. 1, pp. 1 - 1, July, 2005 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Electromagnetic Wave Propagation in Waveguiding Structures Containing DNG Metamaterials, Conf. on Telecommunications - ConfTele, Tomar, Portugal, Vol. 1, pp. 1 - 1, April, 2005 | BibTex
F. M. Janeiro, A. Topa, C. R. Paiva, Reflection and Transmission at a Chiral Planar Interface, Conf. on Telecommunications - ConfTele, Tomar, Portugal, Vol. 1, pp. - - -, April, 2005 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Guided Wave Propagation in H-guides using Double Negative Materials, USNC/URSI National Radio Science Meeting, Monterey, United States, Vol. 1, pp. 156 - 156, June, 2004 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Electromagnetic Wave Propagation in 3D Planar Waveguides Using Unconventional Media, Encuentro Ibérico de Electromagnetismo Computacional - EIEC, Burgos, Spain, Vol. 1, pp. 1 - 4, December, 2003 | BibTex
A. Topa, Leaky modes in planar waveguides containing DNG metamaterials, International Conf. on Electromagnetics in Advanced Applications - ICEAA, Torino, Italy, Vol. 1, pp. 447 - 450, September, 2003 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Discrete Complex Spectrum of 3D Omega Waveguides, USNC/URSI National Radio Science Meeting, Columbus, United States, Vol. 1, pp. 221 - 221, June, 2003 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Recent Results on the Electromagnetic Characterization of Chiral Planar Waveguides, Conf. on Telecommunications - ConfTele, Aveiro, Portugal, Vol. 1, pp. 115 - 118, June, 2003 | BibTex
A. Topa, Contra-Directional Coupling in NRD Directional Coupler with a Metamaterial Slab, URSI General Assembly, Maastricht, Netherlands, Vol. 1, pp. 1878 - 1878, August, 2002 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Complex Spectrum of 3D Open Chiral Waveguides, USNC/URSI National Radio Science Meeting, San Antonio, United States, Vol. 1, pp. 111 - 111, June, 2002 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Surface and Leaky Modes of Multilayered Omega Structures, International Conf. on Electromagnetics of Complex Media - BIANISOTROPICS, Marrakech, Morocco, Vol. 1, pp. 46 - 46, May, 2002 | BibTex
F. M. Janeiro, A. Topa, C. R. Paiva, Leakage characteristics of open chirowaveguides – Dielectric slabs and optical fibers, International Conf. on Electromagnetics of Complex Media - BIANISOTROPICS, Marrakech, Morocco, Vol. 1, pp. 69 - 69, May, 2002 | BibTex
H. M. Ramos, F. M. Janeiro, A. Topa, C. R. Paiva, Material and waveguide dispersion in a symmetric planar chirowaveguide, International Conf. on Electromagnetics of Complex Media - BIANISOTROPICS, Marrakech, Morocco, Vol. 1, pp. 75 - 75, May, 2002 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Electromagnetic Characterization of Abrupt Discontinuities in Chiral Waveguides, Encuentro Ibérico de Electromagnetismo Computacional - EIEC, Aracena, Spain, Vol. 1, pp. 12 - 12, December, 2001 | BibTex
F. M. Janeiro, A. Topa, C. R. Paiva, Semi-Leaky Modes in Chiral Optical Fibers, IEEE Lasers and Electro Optics Society Annual Meeting - LEOS, San Diego, United States, Vol. 1, pp. 897 - 898, November, 2001 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Complex Eigenmodes in Planar Waveguides with Pseudochiral Omega Media, Problems of Interaction of Radiation with Matter, Gomel, Belarus, Vol. 1, pp. 69 - 69, October, 2001 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Complex Spectrum of Planar Omega Structures, International Conf. on Electromagnetics in Advanced Applications - ICEAA, Torino, Italy, Vol. 1, pp. 719 - 722, September, 2001 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Semileaky Modes in Dielectric Pseudochiral Slabs, USNC/URSI National Radio Science Meeting, Boston, United States, Vol. 1, pp. 388 - 388, July, 2001 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Theory of Inhomogeneous Planar Layered Waveguides with Transverse Anisotropy, URSI International Symp. in Electromagnetic Theory, Victoria, Canada, Vol. 1, pp. 98 - 100, May, 2001 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Continuous and Discrete Spectrum of 3D Waveguides with Complex Media – Radiative and Leakage Behavior, Conf. on Telecommunications - ConfTele, Figueira da Foz, Portugal, Vol. 1, pp. 42 - 46, April, 2001 | BibTex
F. M. Janeiro, A. Topa, C. R. Paiva, Optimal Dispersion Maps in Filtered WDM Soliton Systems, Conf. on Telecommunications - ConfTele, Figueira da Foz, Portugal, Vol. 1, pp. 493 - 496, April, 2001 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Design of Pseudochiral Omega-NRD Directional Couplers, Asia Pacific Microwave Conf. - APMC, Sidney, Australia, Vol. 1, pp. 1238 - 1241, December, 2000 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Radiation Control on a Step Discontinuity of a Grounded Chiral Slab, International Conf. on Electromagnetics of Complex Media - BIANISOTROPICS, Lisbon, Portugal, Vol. 1, pp. 325 - 328, September, 2000 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Mode Orthogonality in Pseudochiral Planar Waveguides, USNC/URSI National Radio Science Meeting, Salt Lake City, United States, Vol. 1, pp. 65 - 65, July, 2000 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Leakage Effects in Pseudochiral Waveguides, Progress in Electromagnetics Research Symp. - PIERS, Cambridge, United States, Vol. 1, pp. 95 - 95, July, 2000 | BibTex
F. M. Janeiro, A. Topa, C. R. Paiva, Dispersion-Managed Wavelength Division Multiplexed Soliton Systems with Filtering, Progress in Electromagnetics Research Symp. - PIERS, Boston, United States, Vol. 1, pp. 45 - 45, July, 2000 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Electromagnetic Wave Propagation Characteristics of Chiral and Pseudochiral Waveguides, URSI General Assembly, Toronto, Canada, Vol. 1, pp. 200 - 200, August, 1999 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Leakage Properties of Open 3D Anisotropic Waveguides, USNC/URSI National Radio Science Meeting, Orlando, United States, Vol. 1, pp. 32 - 32, July, 1999 | BibTex
F. M. Janeiro, A. Topa, C. R. Paiva, Gestão da Dispersão em Sistemas de Comunicação Óptica WDM com Solitões, Encontro do Colégio de Electrotecnia da Ordem dos Engenheiros, Lisboa, Portugal, Vol. 1, pp. 127 - 132, May, 1999 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Leaky Modes in Anisotropic Planar Structures with Application to LiNb03 Waveguides, Conf. on Telecommunications - ConfTele, Sesimbra, Portugal, Vol. 1, pp. 476 - 480, April, 1999 | BibTex
F. M. Janeiro, A. Topa, C. R. Paiva, A New Design Procedure to Select Optimal Dispersion Maps for WDM Soliton Communication Systems, Conf. on Telecommunications - ConfTele, Sesimbra, Portugal, Vol. 1, pp. 167 - 171, April, 1999 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Leaky Modes in Open Uniaxial Waveguides, Progress in Electromagnetics Research Symp. - PIERS, Taipei, Taiwan, Vol. 1, pp. 940 - 940, March, 1999 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Rigorous Analysis of the Rectangular Waveguide Loaded with a Pseudochiral Omega Slab, Asia Pacific Microwave Conf. - APMC, Yokohama, Japan, Vol. 1, pp. 277 - 280, December, 1998 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Aplicação do Método dos Mínimos Quadrados ao Estudo de Descontinuidades em Degrau em Guias Dieléctricos Planares, Matemática em Telecomunicações - Que Problemas? - MTQP, Coimbra, Portugal, Vol. 1, pp. 37 - 45, September, 1998 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Leaky Modes in Chiral Rib Waveguides, Progress in Electromagnetics Research Symp. - PIERS, Nantes, France, Vol. 2, pp. 517 - 517, July, 1998 | BibTex
A. Topa, L. N. Vicente, C. R. Paiva, A. Barbosa, Application of the Least Squares Method to the Analysis of Planar Waveguides for Integrated Optics, Optimization, Coimbra, Portugal, Vol. 1, pp. 63 - 63, July, 1998 | BibTex
L. N. Vicente, A. Topa, C. R. Paiva, A. Barbosa, Application of The Least Squares Boundary Residual Method to the Study of Step Discontinuities in Dielectric Planar Waveguides, Matemática em Telecomunicações - Que Problemas? - MTQP, Coimbra, Portugal, Vol. 1, pp. 99 - 108, July, 1998 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Hybrid Mode Propagation in Pseudochiral Uniaxial Waveguides with Rectangular Cross-Section, International Conf. on Electromagnetics of Complex Media - BIANISOTROPICS, Braunschweig, Germany, Vol. 1, pp. 151 - 154, June, 1998 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Omega NRD – Pseudochiral Nonradiative Dielectric Waveguide, Asia Pacific Microwave Conf. - APMC, Hong Kong (SAR), China, Vol. 2, pp. 597 - 600, December, 1997 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, A Linear-Operator Formalism for the Analysis of Inhomogeneous Pseudochiral Planar Waveguides, USNC/URSI National Radio Science Meeting, Montreal, Canada, Vol. 1, pp. 81 - 81, July, 1997 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, A Linear-Operator Formalism for the Analysis of Planar Layered Waveguides Containing Omega Media: Application to Microwave Devices, Conf. on Telecommunications - ConfTele, Aveiro, Portugal, Vol. 1, pp. 111 - 114, April, 1997 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Radiation Modes of an Asymmetric Chiral Slab Waveguide - A General Approach to a New Canonical Problem, Progress in Electromagnetics Research Symp. - PIERS, Hong Kong, Hong Kong, Vol. 2, pp. 684 - 684, January, 1997 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Step Discontinuity in a Planar Dielectric Chiral Slab: An Improved Analysis, Progress in Electromagnetics Research Symp. - PIERS, Innsbruck, Austria, Vol. 1, pp. 495 - 495, July, 1996 | BibTex
A. Topa, C. R. Paiva, A. Barbosa, Rigorous Analysis of a Step Discontinuity in a Planar Dielectric Chiral Slab, International Conf. on Chiral, Bi-isotropic and Bi-anisotropic - CHIRAL, State College, PA, United States, Vol. 1, pp. 131 - 134, October, 1995 | BibTex
C. R. Paiva, A. Barbosa, A. Topa, A new analytical method for the study of layered anisotropic waveguides, IEEE Mediterranean Electrotechnical Conference - MELECON, Lisboa, Portugal, Vol. 89, pp. 691 - 694, April, 1989 | BibTex
C. R. Paiva, A. Barbosa, A. Topa, Analysis of the conductor-backed uniaxial slab with upper-shielding in the polar configuration, Simpósio de Electrónica das Telecomunicações, Porto, Portugal, Vol. 3, pp. xx - xx, May, 1988 | BibTex

Projects

Closed Projects5

Acronym	Name	Funding Agency	Start date	Ending date
CHIRAL	2D and 3D Chiral and Omega Structures:Guidance,Leakage and Radiation Behaviour	FCT/POSI	01-02-2002	30-09-2005
FS	Fiber Solitons: Propagation, Amplification and Switching	FCT/POSI	01-10-2000	01-10-2004
MEIOS ARTIFICIAIS	Propagation and Radiation in Complex Media Using Planar Technology	CRUP	01-01-2002	31-12-2003
MMSUPER	Metamaterial superabsorbers for harnessing wireless power	IT, FCT	01-12-2016	01-12-2018
Non Linear and Chiroguides	Microwave and optical devices for transmission and switching using linear and nonlinear media	FCT/PRAXIS	15-05-1997	21-02-2001

Other Scientific Achievements

1Miscellaneous

A. Barbosa, A. Topa, 8th International Conference on Electromagnetics of Complex Media-BIANISOTROPICS 2000, Editor of Conference Proceedings, ISBN 972-98115-1-2, 01-09-2000

Other Contributions

6Conference Committees

Encuentro Ibérico de Electromagnetismo Computacional - EIEC, Technical Programme Committee, 2007
IV Encontro Ibérico de Electromagnetismo Computacional, Technical Programme Chairman, 2005
ConfTele 2005 - 5th Conference on Telecommunications, Organizing Committee, 2004
PIRM 2001 - Problems of Interaction of Radiation with Matter, Technical Programme Committee, 2001
BIANISOTROPICS 2000 - 8th International Conference on Electromagnetics of Complex Media, Organizing Committee, 2000
ConfTele'99 - 2nd Conference on Telecommunications, Organizing Committee, 1999

1Refereeing Journals

IEEE Transactions on Microwave Theory and Techniques
2007, 1 review(s);

1Refereeing Conferences

2007, 1 review(s);

Related UN SDG

Activities from this researcher fall under the following United Nations Strategic Development Goals (SDGs):

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