Directional coupler composed of CoFeB metallic magnetic film/polyimide dielectric film hybrid transmission line

Author

Takizawa, K. ; Nakazawa, M. ; Sato, T. ; Yamasawa, K. ; Miura, Y. ; Munakata, M. ; Yagi, M.

Author_Institution

Fac. of Eng., Shinshu Univ., Nagano, Japan

Volume

5

fYear

2005

fDate

4-7 Dec. 2005

Abstract

This paper describes a novel thin film type directional coupler using magnetic/dielectric hybrid transmission line device. The hybrid transmission line with a dielectric/magnetic/dielectric sandwich structure has a large effect of wavelength shortening. As a result of signal characteristics evaluation, the directivity of the signal in the device was higher than 18 dB, and insertion loss was less than 0.6 dB at the operating frequency of 0.8∼2 GHz of the cellular phones.

Keywords

boron alloys; cobalt alloys; dielectric thin films; directional couplers; iron alloys; polymer films; transmission lines; 0.8 to 2 GHz; CoFeB; dielectric/magnetic/dielectric sandwich structure; hybrid transmission line; insertion loss; metallic magnetic film; polyimide dielectric film; signal directivity; thin film type directional coupler; wavelength shortening; Dielectric devices; Dielectric films; Dielectric thin films; Directional couplers; Magnetic devices; Magnetic films; Polyimides; Sandwich structures; Thin film devices; Transmission lines;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings

Print_ISBN

0-7803-9433-X

Type

conf

DOI

10.1109/APMC.2005.1606932

Filename

1606932