Title :
Propagation characteristics of over-layered planar transmission line transformers
Author :
Demenicis, Luciene S. ; Conrado, Luiz Fernando M ; Margulis, Walter ; Carvalho, Maria Cristina R
Author_Institution :
Instituto Militar de Engenharia, Secao de Ensino em Engenharia Eletrica, Rio de Janeiro
Abstract :
An over-layered planar transmission line transformer obtained by deposition of high dielectric constant thin films over the conductors printed on alumina substrates is proposed. The resulting effective dielectric constant becomes very high, dispersion is very low, and the cutoff frequency of higher order modes is significantly increased. The theoretical behavior of this device was investigated using the simulator HP-HFSS and the results were compared to those obtained for a coplanar transmission line transformer printed on conventional bulk substrate with relative dielectric constant of 80
Keywords :
alumina; higher order statistics; permittivity; power transformers; power transmission lines; substrates; alumina substrates; bulk substrate; dielectric constant; higher order modes; overlayered planar transmission line transformers; propagation characteristics; relative dielectric constant; Conductive films; Cutoff frequency; Dielectric constant; Dielectric substrates; Dielectric thin films; Dispersion; High-K gate dielectrics; Planar transmission lines; Sputtering; Transformers;
Conference_Titel :
Microwave and Optoelectronics, 2005 SBMO/IEEE MTT-S International Conference on
Conference_Location :
Brasilia
Print_ISBN :
0-7803-9341-4
DOI :
10.1109/IMOC.2005.1580125
