Title :
A thin film spiral microstrip transmission-line using CoZrNb soft magnetic thin film for a quarter wavelength transformer
Author :
Suzuki, Hirotaka ; Sugiyama, Namie ; Sato, Toshiro ; Yamasawa, Kiyohito ; Miura, Yoshimasa ; Miyake, Yuko ; Akie, Masanori ; Uehara, Yuji
Author_Institution :
Fac. of Eng., Shinshu Univ., Nagano, Japan
Abstract :
In order to miniaturize the quarter wavelength transmission-line transformer for high frequency impedance matching, a possibility of a spiral microstrip-line structure with a magnetic/dielectric hybrid structure was investigated. For this purpose, the CoZrNb/polyimide hybrid spiral microstrip-lines with various spiral turns were fabricated and evaluated. From the results, the spiral transmission-line structure enabled to miniaturize the quarter wavelength transformer, whose insertion loss was comparable with that of a straight-line structure.
Keywords :
cobalt alloys; high-frequency transmission lines; impedance matching; magnetic thin films; microstrip lines; niobium alloys; soft magnetic materials; transmission line theory; zirconium alloys; CoZrNb; high frequency impedance matching; insertion loss; magnetic/dielectric hybrid structure; quarter wavelength transformer; soft magnetic thin film; thin film spiral microstrip transmission line; Dielectric thin films; Frequency; Impedance matching; Insertion loss; Magnetic films; Microstrip; Polyimides; Soft magnetic materials; Spirals; Transmission lines; Magnetic/dielectric hybrid medium; quarter wavelength transformer; spiral microstrip-line;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.855185
