@Article{RossiYBGRTSS:2022:RFGeUs,
               author = "Rossi, Jos{\'e} Osvaldo and Yamasaki, Fernanda Sayuri and 
                         Barroso, Joaquim Jos{\'e} and Greco, Ana Fl{\'a}via Guedes and 
                         Rangel, Elizete Gon{\c{c}}alves Lopes and Teixeira, Andr{\'e} 
                         Ferreira and Silva Neto, Lauro Paulo da and Schamiloglu, E.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade Federal de S{\~a}o Paulo (UNIFESP)} and {University 
                         of New Mexico (UNM)}",
                title = "RF generation using a compact bench gyromagnetic line",
              journal = "Review of Scientific Instruments",
                 year = "2022",
               volume = "93",
               number = "2",
                pages = "e024707",
                month = "Feb.",
             abstract = "The search for new technologies aiming to reach radiofrequency 
                         (RF) generation in different manners for diverse ends is a 
                         constant demand for several applications. The goal is to develop 
                         cost-effective and simpler systems compared to those that already 
                         exist. Our motivation is to reach an alternative way of generating 
                         RF in pulsed transmission systems employing a gyromagnetic 
                         nonlinear transmission line (GNLTL). The GNLTL consists of a 
                         ferrite-loaded-coaxial transmission line and can produce a large 
                         frequency spectrum with RF conversion efficiency above 10% from 
                         about 200 MHz up to the frequency of 2-4 GHz (S-band) for 
                         potential space-based applications. In a GNLTL, the signal 
                         amplitude is related to its propagation velocity since the peak 
                         voltage travels faster than its portion of lower amplitudes since 
                         the ferrite permeability decreases with the current amplitude. As 
                         the pulse crest travels faster than its valley, a time reduction 
                         happens in the output rise time, called pulse sharpening. Besides, 
                         the magnetic moments of ferrite dipoles initially aligned with the 
                         axial magnetic bias are displaced from their original position by 
                         the azimuthal field generated around the inner conductor by the 
                         current pulse, resulting in a damped precession movement. This 
                         movement happens along the line length as the current pulse 
                         propagates, inducing high-frequency oscillations. In short, the 
                         paper's goal is to present the experimental results using a 60-cm 
                         gyromagnetic line to provide RF in the GHz range using a solenoid 
                         for magnetic bias on a testing bench. Finally, the paper discusses 
                         the influence of the azimuthal and the axial magnetic fields on 
                         the output signal with the ferrite rings operating in a saturation 
                         state during the current pulse propagation.",
                  doi = "10.1063/5.0067931",
                  url = "http://dx.doi.org/10.1063/5.0067931",
                 issn = "0034-6748",
             language = "en",
           targetfile = "Rossi_2022_RF.pdf",
        urlaccessdate = "29 jun. 2024"
}