Title :
Spiral-type transmission line with an Mn-Zn ferrite core
Author :
Sato, Toshiro ; Sato, Koosuke ; Yamasawa, Kiyohito ; Zhang, Fuchun ; Yanagisawa, Koichi
Author_Institution :
Fac. of Eng., Shinshu Univ., Nagano, Japan
Abstract :
Spiral-type transmission-line devices using an Mn-Zn ferrite core were developed, which consisted of a spiral winding with a polyimide dielectric and a ground plane, an Mn-Zn ferrite pot core (TDK; PC-50). The devices exhibited 20-dB attenuation in a wideband frequency range, which was not only due to the high frequency loss of the ferrite but also due to the distributed constant circuit operation. To analyze the characteristics, a distributed constant circuit model was introduced considering magnetic coupling between different turns in the spiral winding.
Keywords :
band-stop filters; equivalent circuits; ferrite devices; high-frequency transmission lines; magnetic cores; manganese compounds; passive filters; radiofrequency filters; transmission line theory; windings; zinc compounds; Mn-Zn ferrite pot core; MnZnFe2O4; bandstop filter characteristics; distributed constant circuit model; ground plane; high frequency loss; magnetic coupling; polyimide dielectric; spiral winding; spiral-type transmission-line devices; wide-band stop filter characteristics; wideband frequency range; Attenuation; Circuits; Dielectric devices; Ferrites; Frequency; Magnetic cores; Polyimides; Spirals; Transmission lines; Wideband;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.816148
