Title :
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
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;
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
DOI :
10.1109/APMC.2008.4958174
