Fa. Miranda et al., Design and development of ferroelectric tunable microwave components for Ku- and K-band satellite communication systems, IEEE MICR T, 48(7), 2000, pp. 1181-1189
Citations number
25
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Integration of a high-temperature superconductor with a nonlinear dielectri
c ferroelectric such as strontium titanate, i.e., SrTiO3 (STO), has created
a new class of electrically tunable low-loss microwave components. We have
designed and fabricated frequency and phase agile components using a condu
ctor/ferroelectric/dielectric two-layered microstrip configuration. Some ex
amples of these components are: microstrip ring resonators, local oscillato
rs, edge coupled filters, and phase-shifter circuits. These structures have
been fabricated using YBa2Cu3O7-delta or gold conductor-based microstrip l
ines fabricated on lanthanum aluminate (LaAlO3) or magnesium oxide (MgO) su
bstrates coated with an STO thin film. Frequency and phase agility are achi
eved using the nonlinear de electric-field dependence of the relative diele
ctric constant of STO ferroelectric thin film (is an element of(rSTO)) In t
his paper, we will present an assessment of the progress that our group has
achieved thus far toward integration of this technology into wireless and
satellite communication systems.