author = "Yamasaki, Fernanda S. and Rossi, Jos{\'e} Osvaldo and Barroso, 
                         Joaquim Jos{\'e} and Schamiloglu, Edl",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Tecnologico 
                         de Aeron{\'a}utica (ITA)} and {University of New Mexico}",
                title = "Operation of a gyromagnetic line at low and high voltages with 
                         simultaneous axial and azimuthal biases",
              journal = "IEEE Transactions on Plasma Science",
                 year = "2018",
               volume = "46",
               number = "7",
                pages = "2573--2581",
                month = "July",
             keywords = "Ferrites, gyromagnetism, nonlinear transmission line (NLTL), pulse 
                         shaping circuits, radio frequency (RF) generation.",
             abstract = "A great interest has been devoted to the study of nonlinear 
                         transmission lines (NLTLs) for radio frequency (RF) generation 
                         since they have been used with great success in RF generation by 
                         producing a train of oscillatory waves along the line and at its 
                         output. There are two configurations of NLTLs. The first one is a 
                         dispersive line consisting of LC sections with nonlinear 
                         components, and the second one is a continuous ferrite loaded 
                         nondispersive line generally biased by an axial magnetic field, 
                         known as gyromagnetic line. In this paper, the focus of the study 
                         is on the second one, since gyromagnetic lines can operate in a 
                         broader frequency range (0.3-2.0 GHz) with higher conversion 
                         efficiency (20.0%) when compared to lumped NLTLs, generally 
                         limited up to 300 MHz with less than 10.0% of efficiency, because 
                         of their dielectric losses and stray impedances on line structure. 
                         Different models have been used along the years by several authors 
                         with different approaches to study the gyromagnetic phenomenon by 
                         means of numerical simulations based on analytical models to 
                         predict the precession movement of the electron magnetic dipole of 
                         the ferromagnetic material. Thus, the goal of this paper is to 
                         analyze the gyromagnetic NLTL behavior through the effects on the 
                         line operation. The novelty herein is to use two biases 
                         simultaneously to study continuous gyromagnetic NLTLs, focusing on 
                         the pulse rise time compression and RF generation caused by the 
                         precession of the magnetic dipole. An experimental setup is 
                         described and tested for low- and high-voltage operation for a 
                         20-cm gyromagnetic line loaded with NiZn ferrite beads. The 
                         novelty of this paper is to use two biases simultaneously to study 
                         continuous gyromagnetic NLTLs, such techniques can be useful in 
                         the design of continuous lines for RF applications in space and 
                         mobile defense platforms of compact size.",
                  doi = "10.1109/TPS.2018.2840425",
                  url = "http://dx.doi.org/10.1109/TPS.2018.2840425",
                 issn = "0093-3813",
             language = "en",
           targetfile = "yamasaki_operation.pdf",
        urlaccessdate = "29 nov. 2020"