NOVEL SIGNAL PROCESSING WITH NONLINEAR TRANSMISSION LINES

REAGOR, D. ; AL, ET

Los Alamos National Laboratory

关键词: Electrodes;    36 Materials Science;    Dielectric Materials;    24 Power Transmission And Distribution;    Power Transmission Lines;   

DOI  :  10.2172/768777
RP-ID  :  LA-UR-00-3988
RP-ID  :  W-7405-ENG-36
RP-ID  :  768777

美国|英语

来源: UNT Digital Library

【 摘 要 】

Nonlinear dielectrics offer uniquely strong and tunable nonlinearities that make them attractive for current devices (for example, frequency-agile microwave filters) and for future signal-processing technologies. The goal of this project is to understand pulse propagation on nonlinear coplanar waveguide prototype devices. We have performed time-domain and frequency-domain experimental studies of simple waveguide structures and pursued a theoretical understanding of the propagation of signals on these nonlinear waveguides. To realistically assess the potential applications, we used a time-domain measurement and analysis technique developed during this project to perform a broadband electrodynamics characterization in terms of nonlinear, dispersive, and dissipative effects. We completed a comprehensive study of coplanar waveguides made from high-temperature superconducting thin-film YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} electrodes on nonlinear dielectric single-crystal SrTiO{sub 3} substrates. By using parameters determined from small-signal (linear) transmission characteristics of the waveguides, we develop a model equation that successfully predicts and describes large-signal (nonlinear) behavior.