Title :
A novel modified-T equivalent circuit for modeling LTCC embedded inductors with a large bandwidth
Author :
Horng, T.S. ; Wu, J.M. ; Yang, L.Q. ; Fang, S.T.
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Abstract :
In this paper, a modified-T equivalent-circuit model for three-dimensional (3-D) spiral inductors embedded in a multilayer low-temperature cofired ceramic (LTCC) is first presented to achieve a remarkably large bandwidth. This model combines a core circuit, a five-element modified-T model, to include the effects of a transmission line with electrical length up to /spl pi/, and several resonators to consider the effects due to coil coupling and finite ground plane. It is emphasized that most of the elements in this equivalent-circuit model can be extracted directly from the measured S parameters. Compared to the conventional /spl Pi/-section model that is valid only up to the first self resonant frequency (SRF), this model includes more higher-order SRFs and results in a several times larger bandwidth.
Keywords :
S-parameters; ceramic packaging; equivalent circuits; hybrid integrated circuits; inductors; modelling; radiofrequency integrated circuits; LTCC embedded inductors; RFIC; S parameters; bandwidth; coil coupling; embedded 3D spiral inductors; finite ground plane; five-element modified-T model; higher-order self resonant frequencies; low-temperature cofired ceramic; modified-T equivalent circuit; multilayer LTCC; resonators; three-dimensional spiral inductors; transmission line; Bandwidth; Ceramics; Coils; Coupling circuits; Distributed parameter circuits; Equivalent circuits; Inductors; Nonhomogeneous media; Spirals; Transmission line measurements;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1212541