T
Txema Lopetegi
Researcher at Universidad Pública de Navarra
Publications - 143
Citations - 6213
Txema Lopetegi is an academic researcher from Universidad Pública de Navarra. The author has contributed to research in topics: Microstrip & Low-pass filter. The author has an hindex of 31, co-authored 137 publications receiving 5781 citations. Previous affiliations of Txema Lopetegi include University of Navarra.
Papers
More filters
Journal ArticleDOI
Equivalent-circuit models for split-ring resonators and complementary split-ring resonators coupled to planar transmission lines
Juan D. Baena,Jordi Bonache,Ferran Martin,R.M. Sillero,Francisco Falcone,Txema Lopetegi,Miguel A. G. Laso,Joan Garcia-Garcia,Ignacio Gil,M.F. Portillo,Mario Sorolla +10 more
TL;DR: In this paper, a new approach for the development of planar metamaterial structures is developed, and analytical equivalent circuit models are proposed for isolated and coupled split-ring resonators/CSRRs coupled to planar transmission lines.
Journal ArticleDOI
Babinet principle applied to the design of metasurfaces and metamaterials.
Francisco Falcone,Txema Lopetegi,Miguel A. G. Laso,Juan D. Baena,Jordi Bonache,Miguel Beruete,Ricardo Marqués,Ferran Martin,Mario Sorolla +8 more
TL;DR: A new particle, the complementary split rings resonator, is proposed for the design of metasurfaces with high frequency selectivity and planar metamaterials with a negative dielectric permittivity.
Journal ArticleDOI
Effective negative-/spl epsiv/ stopband microstrip lines based on complementary split ring resonators
TL;DR: In this article, a super-compact stopband microstrip structure is proposed, where the frequency gap is produced by an array of complementary split ring resonators (CSRRs), a concept proposed for the first time on the ground plane.
Journal ArticleDOI
New microstrip "Wiggly-Line" filters with spurious passband suppression
Txema Lopetegi,Miguel A. G. Laso,J. Hernandez,M. Bacaicoa,D. Benito,M.J. Garde,M. Sorolla,Marco Guglielmi +7 more
TL;DR: In this paper, a parallel-coupled-line microstrip bandpass filter with suppressed spurious passband is presented, where the wave impedance is modulated so that the harmonic passband of the filter is rejected while the desired passband response is maintained virtually unaltered.
Journal ArticleDOI
Microwave filters with improved stopband based on sub-wavelength resonators
Joan Garcia-Garcia,Ferran Martin,Francisco Falcone,Jordi Bonache,Juan D. Baena,Ignacio Gil,Esteve Amat,Txema Lopetegi,Miguel A. G. Laso,J.A.M. Iturmendi,M. Sorolla,Ricardo Marqués +11 more
TL;DR: In this article, the authors demonstrate the potential of sub-wavelength resonators, namely, split-ring resonators and complementary split ring resonators to suppress undesired spurious bands in microwave filters, a key aspect to improve their rejection bandwidths.