Papers in Conference Proceedings  [117] 

- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "Biaxial Media Beyond Electric Anisotropy", Proc Encuentro Ibérico de Electromagnetismo Computacional - EIEC , Sesimbra, Portugal, Vol. -, pp. - - -, November, 2011.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Recent Investigation on Indefinite Medium Waveguides", Proc Encuentro Ibérico de Electromagnetismo Computacional - EIEC , Sesimbra, Portugal, Vol. 1, pp. 1 - 1, November, 2011.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "Conical Refraction in Generalized Biaxial Media A Geometric Algebra Approach", Proc EUROCON and CONFTELE 2011, Lisbon, Portugal, Vol. -, pp. - - -, April, 2011.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Dispersion Diagrams of Waveguides Filled With Indefinite Media", Proc EUROCON and CONFTELE 2011, Lisbon, Portugal, Vol. 1, pp. 1 - 1, April, 2011.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "Relativistic Effects for Superluminal (Bi)-isotropic Media", Proc Metamorphose International Congress on Advanced Electromagnetic Materials in Microwaves and Optics - METAMATERIALS, Karlsruhe, Germany, Vol. -, pp. - - -, September, 2010.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "Complex Aberration and a New Cerenkov Effect for Superluminal Phase Velocities", Proc URSI International Symp. in Electromagnetic Theory, Berlin, Germany, Vol. -, pp. - - -, August, 2010.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Electromagnetic Wave Propagation in Waveguides with Indefinite Media", Proc IEEE AP-S/URSI International Symp., Toronto, Canada, Vol. 1, pp. 1 - 1, July, 2010.
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- Canto, João R.; Paiva, C. R.; Barbosa, A.; "A building block approach to H-guides containing biisotropic media", Proc Encuentro Ibérico de Electromagnetismo Computacional - EIEC , Monfragüe - Cáceres, Spain, Vol. -, pp. - - -, May, 2010.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "Advantages of Geometric Algebra as a New Coordinate-free Approach to Complex Media", Proc Encuentro Ibérico de Electromagnetismo Computacional - EIEC , Monfragüe- Cáceres, Spain, Vol. -, pp. - - -, May, 2010.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Variable Omega Directional Couplers", Proc Encuentro Ibérico de Electromagnetismo Computacional - EIEC , Cáceres, Spain, Vol. 1, pp. 1 - 1, May, 2010.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "A geometric perspective on omega-like media ", Proc NATO Advanced Research Workshop: Metamaterials for Secure Information and Communication Technologies - ARW, Cairo, Egypt, Vol. -, pp. - - -, February, 2010.
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- Canto, João R.; Paiva, C. R.; Barbosa, A.; "Guidance and Leakage Properties of Tellegen H-guides", Proc NATO Advanced Research Workshop: Metamaterials for Secure Information and Communication Technologies - ARW, Cairo, Egypt, Vol. -, pp. - - -, February, 2010.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "NRD Directional Couplers using Omega Media", Proc NATO Advanced Research Workshop: Metamaterials for Secure Information and Communication Technologies - ARW, Cairo, Egypt, Vol. 1, pp. 1 - 1, February, 2010.
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- Canto, João R.; Paiva, C. R.; Barbosa, A.; "A geometric algebra approach to the reflection and transmission of electromagnetic waves at interfaces between isotropic and general anisotropic media", Proc Metamorphose International Congress on Advanced Electromagnetic Materials in Microwaves and Optics - METAMATERIALS, London, United Kingdom, Vol. -, pp. - - -, September, 2009.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "A New Geometric Perspective on Bianisotropy Using Clifford Algebra", Proc Metamorphose International Congress on Advanced Electromagnetic Materials in Microwaves and Optics - METAMATERIALS, London, United Kingdom, Vol. -, pp. - - -, September, 2009.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "Vacuum Form Reduction for Moving Bi-isotropic Media", Proc Metamorphose International Congress on Advanced Electromagnetic Materials in Microwaves and Optics - METAMATERIALS, London, United Kingdom, Vol. -, pp. - - -, September, 2009.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "New NRD-waveguide Devices Using Metamaterials", Proc Progress in Electromagnetics Research Symp. - PIERS, Moscow, Russia, Vol. 1, pp. 1 - 1, August, 2009.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "Beyond Isotropic Metamaterials: From Anisotropic to Bianisotropic Media Using the Geometric Perspective Provided by Clifford Algebra", Proc Young Scientist Meeting on Metamaterials, Leganés, Spain, Vol. -, pp. - - -, July, 2009.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "A Spacetime Algebra Approach to Moving Bi-isotropic Media", Proc IEEE AP-S/URSI International Symp., Charleston, United States, Vol. -, pp. - - -, June, 2009.
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- Canto, João R.; Paiva, C. R.; Barbosa, A.; "Analysis of Tellegen H-Guides", Proc IEEE AP-S/URSI International Symp., Charlston, United States, Vol. -, pp. - - -, June, 2009.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Leakage, Dispersion and Losses in Omega H-Guides", Proc IEEE AP-S/URSI International Symp., Charleston, United States, Vol. 1, pp. 1 - 1, June, 2009.
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- Canto, João R.; Paiva, C. R.; Barbosa, A.; "A novel approach to the reflection and transmission of electromagnetic waves at interfaces between isotropic and general anisotropic media", Proc Conf. on Telecommunications - ConfTele, Santa Maria da Feira, Portugal, Vol. -, pp. - - -, May, 2009.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Leaky Mode Dispersion in Omega NRD Waveguides", Proc Conf. on Telecommunications - ConfTele, Vila da Feira, Portugal, Vol. 1, pp. 1 - 1, May, 2009.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "Optic axes of general anisotropic media: a geometric algebra perspective", Proc Conf. on Telecommunications - ConfTele, Santa Maria da Feira, Portugal, Vol. -, pp. - - -, May, 2009.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Metamaterial Dispersion and Loss in a Double Negative Nonradiative Dielectric Waveguide", Proc IEEE CONVENTION OF ELECTRICAL AND ELECTRONICS ENGINEERS IN ISRAEL - IEEE-I, Eilat, Israel, Vol. , pp. - - -, December, 2008.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Guided Waves in Metamaterials", Proc URSI Seminar of the Portuguese Committee, Lisboa, Portugal, Vol. , pp. - - -, November, 2008.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "Electromagnetics of Complex Media using Geometric Algebra", Proc Encuentro Ibérico de Electromagnetismo Computacional - EIEC , Cádiz, Spain, Vol. -, pp. - - -, October, 2008.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Guided Waves in Metamaterial Three-dimensional Waveguides", Proc Encuentro Ibérico de Electromagnetismo Computacional - EIEC , Cádiz, Spain, Vol. , pp. 1 - 1, October, 2008.
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- Canto, João R.; Matos, S.A.; Paiva, C. R.; Barbosa, A.; "Interfaces between air and general anisotropic media: A geometric approach", Proc Encuentro Ibérico de Electromagnetismo Computacional - EIEC , Cádiz, Spain, Vol. -, pp. - - -, October, 2008.
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- Canto, João R.; Matos, S.A.; Barbosa, A.; Paiva, C. R.; "Dispersion and Losses at Air-DNG and Air-Chiral Interfaces", Proc Metamorphose International Congress on Advanced Electromagnetic Materials in Microwaves and Optics - METAMATERIALS, Pamplona, Spain, Vol. 1, pp. 353 - 355, September, 2008.
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- Matos, S.A.; Canto, João R.; Paiva, C. R.; Barbosa, A.; "New insights into anisotropy and bianisotropy using geometric algebra", Proc Metamorphose International Congress on Advanced Electromagnetic Materials in Microwaves and Optics - METAMATERIALS, Pamplona, Spain, Vol. 1, pp. 43 - 43, September, 2008.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "The effect of material dispersion in omega nonradiative dielectric waveguides", Proc URSI General Assembly, Chicago, United States, Vol. 1, pp. 1 - 1, August, 2008.
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- Matos, S.A.; Canto, João R.; Paiva, C. R.; Barbosa, A.; "A New Framework Based on Geometric Algebra for the Analysis of Materials and Metamaterials with Electric and Magnetic Anisotropy", Proc IEEE AP-S/URSI International Symp., San Diego, United States, Vol. -, pp. - - -, July, 2008.
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- Matos, S.A.; Canto, João R.; Paiva, C. R.; Barbosa, A.; "Complex Aberration Effect in Moving Dispersive DNG Media: A Spacetime Algebra Approach", Proc Progress in Electromagnetics Research Symp. - PIERS, Cambridge, United States, Vol. 1, pp. 822 - 825, July, 2008.
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- Canto, João R.; Matos, S.A.; Paiva, C. R.; Barbosa, A.; "Effect of Losses in a Layered Structure Containing DPS and DNG Media", Proc Progress in Electromagnetics Research Symp. - PIERS, Cambridge, United States, Vol. 1, pp. 817 - 821, July, 2008.
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- Canto, João R.; Matos, S.A.; Paiva, C. R.; Barbosa, A.; "Isotropic-Uniaxial Interfaces for Anisotropic Media with Biaxial Electric and Magnetic Functions: A New Approach with Geometric Algebra", Proc IEEE AP-S/URSI International Symp., San Diego, United States, Vol. 1-9, pp. 1380 - 1383, July, 2008.
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- Matos, S.A.; Canto, João R.; Paiva, C. R.; Barbosa, A.; "A geometric algebra approach to bianisotropy", Proc NATO Advanced Research Workshop: Metamaterials for Secure Information and Communication Technologies - ARW, Marrakesh, Morocco, Vol. 1, pp. 86 - 86, May, 2008.
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- Canto, João R.; Matos, S.A.; Paiva, C. R.; Barbosa, A.; "A geometric algebra approach to media with both general electric and magnetic anisotropy", Proc NATO Advanced Research Workshop: Metamaterials for Secure Information and Communication Technologies - ARW, Marrakesh, Morocco, Vol. 1, pp. 371 - 371, May, 2008.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "The effect of metamaterial losses in DNG H-guide performance", Proc NATO Advanced Research Workshop: Metamaterials for Secure Information and Communication Technologies - ARW, Marrakesh, Morocco, Vol. 1, pp. 569 - 569, May, 2008.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "A Coordinate-Free Approach to a Pseudochiral Omega Medium", Proc Metamorphose International Congress on Advanced Electromagnetic Materials in Microwaves and Optics - METAMATERIALS, Rome, Italy, Vol. 1, pp. 45 - 45, October, 2007.
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- Canto, João R.; Paiva, C. R.; Barbosa, A.; "Bloch Waves with Negative Phase Velocity in Multilayered Structures Containing Uniaxial Chiral Media", Proc Metamorphose International Congress on Advanced Electromagnetic Materials in Microwaves and Optics - METAMATERIALS, Roma, Italy, Vol. 1, pp. 226 - 229, October, 2007.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Proper Leaky Modes in DNG Ridge Waveguides", Proc Progress in Electromagnetics Research Symp. - PIERS, Prague, Czech Republic, Vol. 1, pp. 1 - 4, August, 2007.
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- Canto, João R.; Paiva, C. R.; Barbosa, A.; "Multilayered Structures Containing Isotropic Chiral Media: Bloch Waves with Negative Phase Velocity and Forbidden Bands", Proc URSI International Symp. in Electromagnetic Theory, Ottawa, Canada, Vol. -, pp. - - -, July, 2007.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "New Approach on the Electromagnetics of a Moving Chiral Media", Proc URSI International Symp. in Electromagnetic Theory, Ottawa, Canada, Vol. -, pp. - - -, July, 2007.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Dispersive Leaky-Mode Propagation in Metamaterial Nonradiative Dielectric Waveguides", Proc IEEE AP-S/URSI International Symp., Honolulu, United States, Vol. 1, pp. 1 - 4, June, 2007.
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- Matos, S.A.; Paiva, C. R.; Canto, João R.; Barbosa, A.; "Complex Waves in a Grounded Bianisotropic Slab with Omega Inclusions", Proc Conf. on Telecommunications - ConfTele, Peniche, Portugal, Vol. 1, pp. 97 - 100, May, 2007.
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- Canto, João R.; Paiva, C. R.; Matos, S.A.; Barbosa, A.; "Leaky wave propagation in a uniaxial chiroslabguide", Proc Conf. on Telecommunications - ConfTele, Peniche, Portugal, Vol. 1, pp. 41 - 44, May, 2007.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Propagation Analysis of Chiral H-Guides", Proc Conf. on Telecommunications - ConfTele, Peniche, Portugal, Vol. 1, pp. 5 - 8, May, 2007.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Assessment of the Effective Index Method in the Analysis of DNG Metamaterial Waveguides", Proc Encuentro Ibérico de Electromagnetismo Computacional - EIEC , Barcelona, Spain, Vol. 1, pp. 1 - 4, April, 2007.
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- Matos, S.A.; Paiva, C. R.; Barbosa, A.; "Effect of Dispersion on a Moving DNG Medium", Proc Encuentro Ibérico de Electromagnetismo Computacional - EIEC , Aiguablava, Spain, Vol. 1, pp. 1 - 4, April, 2007.
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- Canto, João R.; Paiva, C. R.; Barbosa, A.; "Forbidden bands in periodic multilayered structures containing DNG media", Proc Encuentro Ibérico de Electromagnetismo Computacional - EIEC , Aiguablava, Spain, Vol. -, pp. - - -, April, 2007.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Electromagnetic-Wave Propagation in Chiral H-Guides", Proc USNC/URSI National Radio Science Meeting, Albuquerque, United States, Vol. 1, pp. 1 - 1, July, 2006.
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- Matos, S.A.; Paiva, C. R.; Canto, João R.; Barbosa, A.; "Guided Electromagnetic Wave Propagation at an Air-Pseudochiral Omega Interface", Proc Workshop on metamaterials and Special materials for Electromagnetic Applications and TLC, Rome, Italy, Vol. 1, pp. 84 - 84, March, 2006.
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- Canto, João R.; Paiva, C. R.; Matos, S.A.; Barbosa, A.; "Surface and Leaky-Modes in a Uniaxial Grounded Chiroslabguide", Proc Workshop on metamaterials and Special materials for Electromagnetic Applications and TLC, Roma, Italy, Vol. 1, pp. 56 - 56, March, 2006.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "DNG-NRD Directional Couplers", Proc Progress in Electromagnetics Research Symp. - PIERS, Hangzhou, China, Vol. 1, pp. 115 - 115, August, 2005.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Mode Coupling in Parallel DNG/DPS H-Guides: A Full-wave Analysis", Proc USNC/URSI National Radio Science Meeting, Washington, United States, Vol. 1, pp. 1 - 1, July, 2005.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Electromagnetic Wave Propagation in Waveguiding Structures Containing DNG Metamaterials", Proc Conf. on Telecommunications - ConfTele, Tomar, Portugal, Vol. 1, pp. 1 - 1, April, 2005.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Guided Wave Propagation in H-guides using Double Negative Materials", Proc USNC/URSI National Radio Science Meeting, Monterey, United States, Vol. 1, pp. 156 - 156, June, 2004.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Electromagnetic Wave Propagation in 3D Planar Waveguides Using Unconventional Media", Proc Encuentro Ibérico de Electromagnetismo Computacional - EIEC , Burgos, Spain, Vol. 1, pp. 1 - 4, December, 2003.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Discrete Complex Spectrum of 3D Omega Waveguides", Proc USNC/URSI National Radio Science Meeting, Columbus, United States, Vol. 1, pp. 221 - 221, June, 2003.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Recent Results on the Electromagnetic Characterization of Chiral Planar Waveguides", Proc Conf. on Telecommunications - ConfTele, Aveiro, Portugal, Vol. 1, pp. 115 - 118, June, 2003.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Complex Spectrum of 3D Open Chiral Waveguides", Proc USNC/URSI National Radio Science Meeting, San Antonio, United States, Vol. 1, pp. 111 - 111, June, 2002.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Surface and Leaky Modes of Multilayered Omega Structures", Proc International Conf. on Electromagnetics of Complex Media - BIANISOTROPICS , Marrakech, Morocco, Vol. 1, pp. 46 - 46, May, 2002.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Electromagnetic Characterization of Abrupt Discontinuities in Chiral Waveguides", Proc Encuentro Ibérico de Electromagnetismo Computacional - EIEC , Aracena, Spain, Vol. 1, pp. 12 - 12, December, 2001.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Complex Eigenmodes in Planar Waveguides with Pseudochiral Omega Media", Proc Problems of Interaction of Radiation with Matter, Gomel, Belarus, Vol. 1, pp. 69 - 69, October, 2001.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Complex Spectrum of Planar Omega Structures", Proc International Conf. on Electromagnetics in Advanced Applications - ICEAA, Torino, Italy, Vol. 1, pp. 719 - 722, September, 2001.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Semileaky Modes in Dielectric Pseudochiral Slabs", Proc USNC/URSI National Radio Science Meeting, Boston, United States, Vol. 1, pp. 388 - 388, July, 2001.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Theory of Inhomogeneous Planar Layered Waveguides with Transverse Anisotropy", Proc URSI International Symp. in Electromagnetic Theory, Victoria, Canada, Vol. 1, pp. 98 - 100, May, 2001.
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- Costa, J.R.; Ramos, P.M.; Paiva, C. R.; Barbosa, A.; "Amplification of Wavelength Division Multiplexing in Multi-Core Erbium Doped Fiber Amplifiers", Proc Conf. on Telecommunications - ConfTele, Figueira da Foz, Portugal, Vol. 1, pp. 479 - 483, April, 2001.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Continuous and Discrete Spectrum of 3D Waveguides with Complex Media – Radiative and Leakage Behavior", Proc Conf. on Telecommunications - ConfTele, Figueira da Foz, Portugal, Vol. 1, pp. 42 - 46, April, 2001.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Design of Pseudochiral Omega-NRD Directional Couplers", Proc Asia Pacific Microwave Conf. - APMC, Sidney, Australia, Vol. 1, pp. 1238 - 1241, December, 2000.
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- Costa, J.R.; Ramos, P.M.; Paiva, C. R.; Barbosa, A.; "A Numerical Study of WDM Pulse Equalization in Twin-Core Fiber Amplifiers", Proc IEEE Lasers and Electro Optics Society Annual Meeting - LEOS, Puerto Rico, Puerto Rico, Vol. 1, pp. 275 - 276, November, 2000.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Radiation Control on a Step Discontinuity of a Grounded Chiral Slab", Proc International Conf. on Electromagnetics of Complex Media - BIANISOTROPICS , Lisbon, Portugal, Vol. 1, pp. 325 - 328, September, 2000.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Leakage Effects in Pseudochiral Waveguides", Proc Progress in Electromagnetics Research Symp. - PIERS, Cambridge, United States, Vol. 1, pp. 95 - 95, July, 2000.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Mode Orthogonality in Pseudochiral Planar Waveguides", Proc USNC/URSI National Radio Science Meeting, Salt Lake City, United States, Vol. 1, pp. 65 - 65, July, 2000.
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- Costa, J.R.; Ramos, P.M.; Paiva, C. R.; Barbosa, A.; "Wavelength Division Multiplexing With Solitons in Erbium-Dped Fiber Couplers", Proc Progress in Electromagnetics Research Symp. - PIERS, Boston, United States, Vol. 1, pp. 46 - 46, July, 2000.
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- Costa, J.R.; Paiva, C. R.; Barbosa, A.; "Soliton Amplification in Erbium-Doped Fibers with Co-propagating Noise", Proc International Symp. on Recent Advances in Microwave Technology, Malaga, Spain, Vol. 1, pp. 49 - 52, December, 1999.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Electromagnetic Wave Propagation Characteristics of Chiral and Pseudochiral Waveguides", Proc URSI General Assembly, Toronto, Canada, Vol. 1, pp. 200 - 200, August, 1999.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Leakage Properties of Open 3D Anisotropic Waveguides", Proc USNC/URSI National Radio Science Meeting, Orlando, United States, Vol. 1, pp. 32 - 32, July, 1999.
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- Costa, J.R.; Paiva, C. R.; Barbosa, A.; "Amplificação de Solitões em Fibras Amplificadoras Dopadas com Érbio", Proc Encontro do Colégio de Electrotecnia da Ordem dos Engenheiros, Lisboa, Portugal, Vol. 1, pp. 133 - 140, May, 1999.
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- Costa, J.R.; Paiva, C. R.; Barbosa, A.; "A New Numerical Method for Multichannel Soliton Amplification in Erbium-Doped Fiber Amplifiers", Proc Conf. on Telecommunications - ConfTele, Sesimbra, Portugal, Vol. 1, pp. 163 - 166, April, 1999.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Leaky Modes in Anisotropic Planar Structures with Application to LiNb03 Waveguides", Proc Conf. on Telecommunications - ConfTele, Sesimbra, Portugal, Vol. 1, pp. 476 - 480, April, 1999.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Leaky Modes in Open Uniaxial Waveguides", Proc Progress in Electromagnetics Research Symp. - PIERS, Taipei, Taiwan, Vol. 1, pp. 940 - 940, March, 1999.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Rigorous Analysis of the Rectangular Waveguide Loaded with a Pseudochiral Omega Slab", Proc Asia Pacific Microwave Conf. - APMC, Yokohama, Japan, Vol. 1, pp. 277 - 280, December, 1998.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Aplicação do Método dos Mínimos Quadrados ao Estudo de Descontinuidades em Degrau em Guias Dieléctricos Planares", Proc Matemática em Telecomunicações - Que Problemas? - MTQP, Coimbra, Portugal, Vol. 1, pp. 37 - 45, September, 1998.
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- L. N. Vicente; Topa, A.; Paiva, C. R.; Barbosa, A.; "Application of The Least Squares Boundary Residual Method to the Study of Step Discontinuities in Dielectric Planar Waveguides", Proc Matemática em Telecomunicações - Que Problemas? - MTQP, Coimbra, Portugal, Vol. 1, pp. 99 - 108, July, 1998.
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- Topa, A.; L. N. Vicente; Paiva, C. R.; Barbosa, A.; "Application of the Least Squares Method to the Analysis of Planar Waveguides for Integrated Optics", Proc Optimization, Coimbra, Portugal, Vol. 1, pp. 63 - 63, July, 1998.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Leaky Modes in Chiral Rib Waveguides", Proc Progress in Electromagnetics Research Symp. - PIERS, Nantes, France, Vol. 2, pp. 517 - 517, July, 1998.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Hybrid Mode Propagation in Pseudochiral Uniaxial Waveguides with Rectangular Cross-Section", Proc International Conf. on Electromagnetics of Complex Media - BIANISOTROPICS , Braunschweig, Germany, Vol. 1, pp. 151 - 154, June, 1998.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Omega NRD – Pseudochiral Nonradiative Dielectric Waveguide", Proc Asia Pacific Microwave Conf. - APMC, Hong Kong (SAR), China, Vol. 2, pp. 597 - 600, December, 1997.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "A Linear-Operator Formalism for the Analysis of Inhomogeneous Pseudochiral Planar Waveguides", Proc USNC/URSI National Radio Science Meeting, Montreal, Canada, Vol. 1, pp. 81 - 81, July, 1997.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "A Linear-Operator Formalism for the Analysis of Planar Layered Waveguides Containing Omega Media: Application to Microwave Devices", Proc Conf. on Telecommunications - ConfTele, Aveiro, Portugal, Vol. 1, pp. 111 - 114, April, 1997.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Radiation Modes of an Asymmetric Chiral Slab Waveguide - A General Approach to a New Canonical Problem", Proc Progress in Electromagnetics Research Symp. - PIERS, Hong Kong, Hong Kong, Vol. 2, pp. 684 - 684, January, 1997.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Step Discontinuity in a Planar Dielectric Chiral Slab: An Improved Analysis", Proc Progress in Electromagnetics Research Symp. - PIERS, Innsbruck, Austria, Vol. 1, pp. 495 - 495, July, 1996.
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- Topa, A.; Paiva, C. R.; Barbosa, A.; "Rigorous Analysis of a Step Discontinuity in a Planar Dielectric Chiral Slab", Proc International Conf. on Chiral, Bi-isotropic and Bi-anisotropic - CHIRAL, State College, PA, United States, Vol. 1, pp. 131 - 134, October, 1995.
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- Fernandes, C. A.; P. O. Francês; Barbosa, A.; "Shaped coverage of elongated cells at millimetre waves using a dielectric lens antenna", Proc European Microwave Conf. - EMC, Bolonha, Italy, Vol. 1, pp. 66 - 70, September, 1995.
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- Fernandes, C. A.; P. O. Francês; Barbosa, A.; "Dielectric Lens Antenna for a Mobile Application at Millimetrewaves", Proc ESA Workshop on Lens Antennas, Noordwijk, Netherlands, Vol. 1, pp. - , July, 1994.
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- Peixeiro, C.; Barbosa, A.; "Analysis of circular patch antennas printed on multilayered anisotropic structures", Proc Journees Internationales de Nice sur les Antennes - JINA, Nice, France, Vol. 1, pp. 131 - 134, June, 1994.
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- Fernandes, C. A.; P. O. Francês; Barbosa, A.; "A Dielectric Lens Antenna for the MBS Demonstrator", Proc RACE Mobile Workshop, Amsterdam, Netherlands, Vol. 1, pp. 17 - 19, May, 1994.
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- Peixeiro, C.; Barbosa, A.; "Measurement of anisotropy in microwave substrates", Proc Progress in Electromagnetics Research Symp. - PIERS, Pasadena, United States, Vol. 1, pp. 50 - 50, September, 1993.
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- Peixeiro, C.; Barbosa, A.; "Green´s function for the analysis of a circular microstrip antenna embedded in a multilayer anisotropic structure", Proc COST 223 - ESA Workshop on Active Antennas, Noordwijk, Netherlands, Vol. 1, pp. 151 - 156, June, 1992.
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- Peixeiro, C.; Barbosa, A.; "Rigorous analysis of coaxial feeds for microstrip antennas in multilayered anisotropic substrates:comparison of numerical methods", Proc Progress in Electromagnetics Research Symp. - PIERS, Cambridge, United States, Vol. 1, pp. 598 - 598, September, 1991.
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- Correia, L. M.; Barbosa, A.; "An approximate (symmetric) combined field integral equation for the analysis of scattering by conducting bodies in the ressonance region", Proc Appl. Computational Electromagnetics Society Conf. - ACES, Monterey, United States, Vol. 1, pp. 190 - 197, March, 1991.
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- Peixeiro, C.; Barbosa, A.; "Far field radiation pattern of a vertical feed probe embedded in a thick anisotropic multilayered structure", Proc Journees Internationales de Nice sur les Antennes - JINA, Nice, France, Vol. 1, pp. 349 - 352, July, 1990.
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- Correia, L. M.; Barbosa, A.; "An approximate (symmetric) magnetic field integral equation for the analysis of scattering by conducting bodies", Proc IEEE AP-S/URSI International Symp., Dallas, United States, Vol. 2, pp. 902 - 905, June, 1990.
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- Fernandes, C. A.; Barbosa, A.; "Wiener-Hopf Analysis of the Radiation from a Finite Length Multifilar Helix Fed by a Circular Waveguide (abstract)", Proc IEEE AP-S/URSI International Symp., Dallas, United States, Vol. 1, pp. 168 - 168, May, 1990.
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- Correia, L. M.; Barbosa, A.; "The augmented magnetic field integral equation with triangular patches for the analysis of scattering by conducting bodies", Proc Appl. Computational Electromagnetics Society Conf. - ACES, Monterey, United States, Vol. 1, pp. 422 - 429, March, 1990.
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- Fernandes, C. A.; Barbosa, A.; "Radiation From a Multifilar Helix Fed by a Circular Waveguide", Proc International Symp. on Antennas and Propagation - ISAP, Toquio, Japan, Vol. 1, pp. 505 - 508, August, 1989.
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- Peixeiro, C.; Barbosa, A.; "Analysis of a coaxial probe radiating through a thick uniaxial anisotropic two layer structure", Proc IEEE AP-S/URSI International Symp., San Jose, United States, Vol. 1, pp. 1707 - 1710, June, 1989.
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- Paiva, C. R.; Barbosa, A.; Topa, A.; "A new analytical method for the study of layered anisotropic waveguides", Proc IEEE Mediterranean Electr. Conf. - MELECON , Lisboa, Portugal, Vol. 89, pp. 691 - 694, April, 1989.
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- Correia, L. M.; Barbosa, A.; "An algorithm for the choice of integral equation for the analysis of scattering by arbitrary shape conducting bodies", Proc Journees Internationales de Nice sur les Antennes - JINA, Nice, France, Vol. 1, pp. 53 - 56, November, 1988.
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- Correia, L. M.; Barbosa, A.; "A procedure for the analysis of scattering by arbitrary shape conducting bodies in the ressonance region", Proc IEEE AP-S/URSI International Symp., Syracuse, United States, Vol. 2, pp. 898 - 901, June, 1988.
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- Peixeiro, C.; Barbosa, A.; "Radiation by a probe through a thick uniaxially anisotropic substrate-superstrate configuration", Proc COST 213 / KUL-Phased Array Workshop, Leuven, Belgium, Vol. 1, pp. 47 - 52, June, 1988.
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- Paiva, C. R.; Barbosa, A.; Topa, A.; "Analysis of the conductor-backed uniaxial slab with upper-shielding in the polar configuration", Proc Simpósio de Electrónica das Telecomunicações, Porto, Portugal, Vol. 3, pp. xx - xx, May, 1988.
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- Paiva, C. R.; Barbosa, A.; "Analysis of the uniaxial dielectric ridge waveguide with vertical optical axis by the effective-dielectric constant method ", Proc Simpósio de Electrónica das Telecomunicações, Porto, Portugal, Vol. 3, pp. xx - xx, May, 1988.
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- Fernandes, C. A.; Barbosa, A.; "Complex Wave Radiation of a Sheath Helix Excited in the n=1 Modes", Proc IEEE Mediterranean Electr. Conf. - MELECON , Madrid, Spain, Vol. 3, pp. 157 - 160, October, 1985.
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- Correia, L. M.; J. Figanier; Barbosa, A.; "Scattering by 3-dimensional conducting bodies with edges:assessment of a numerical method", Proc IEEE Mediterranean Electr. Conf. - MELECON , Madrid, Spain, Vol. 3, pp. 255 - 258, June, 1985.
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