A New Multilayered Common-Mode Filter Based on LTCC

Author

Xu, Qinfen ; Bi, Xiaojun ; Wu, Guoan

Author_Institution

Dept. of Electron. Sci. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan

fYear

2008

fDate

16-20 Dec. 2008

Firstpage

1

Lastpage

4

Abstract

In this paper, a new multilayered CMF which consists of two helical lines with LTCC technology is presented for the first time. The pattern of each positive coil is interlaced with that of each negative coil. The coils consist of a pair of 3D helical lines, and each of them has only half a turn on each layer. A novel improvement of the helical structure is proposed, which adopts the twisted coil pattern to separate the vias of each coil, and the other part of the coils in different layers are overlapped. This structure produces the excellent design characteristics of large common mode attenuation and low differential mode insertion loss. In addition, the size of the CMF is very small, easily meeting the requirement of size reduction of RF components. The CMF with this structure has been patented.

Keywords

filters; inductors; 3D helical lines; LTCC; RF components; common mode attenuation; differential mode insertion loss; helical structure; multilayered CMF; multilayered common-mode filter; twisted coil pattern; Attenuation; Coils; Degradation; Filters; Inductance; Inductors; Insertion loss; Magnetic cores; Magnetic separation; Scattering parameters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2008. APMC 2008. Asia-Pacific

Conference_Location

Macau

Print_ISBN

978-1-4244-2641-6

Electronic_ISBN

978-1-4244-2642-3

Type

conf

DOI

10.1109/APMC.2008.4958174

Filename

4958174