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

fYear

2005

fDate

25-25 July 2005

Firstpage

562

Lastpage

564

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Optoelectronics, 2005 SBMO/IEEE MTT-S International Conference on

Conference_Location

Brasilia

Print_ISBN

0-7803-9341-4

Type

conf

DOI

10.1109/IMOC.2005.1580125

Filename

1580125