Mutual Inductance of Capacitor Low-Pass Filters

Author

Fischer, Thomas ; Kneuer, Christian ; Albach, Manfred ; Schubert, Goeran

Author_Institution

Dept. of Electromagn. Fields, Univ. of Erlangen-Nuremberg, Erlangen

fYear

2009

fDate

12-16 Jan. 2009

Firstpage

381

Lastpage

384

Abstract

This paper describes the magnetic coupling of simple SMD capacitor low-pass filters which is investigated by the method of partial elements (PEEC). Based on analytical equations, the improvement of simple filter structures is possible with the help of the PCB layout only. As has been shown by measurement and simulation, the advanced usage of one and two capacitors allows improvements of up to 20 dB at 1 GHz resulting exclusively from the chosen PCB layout. Moreover, attenuation can be increased up to 42 dB with low-ESL capacitors.

Keywords

capacitors; inductance; low-pass filters; printed circuit layout; surface mount technology; PCB layout; PEEC; SMD capacitor low-pass filters; analytical equations; equivalent series inductance; frequency 1 GHz; low-ESL capacitors; mutual inductance; partial element method; partial equivalent element circuits; surface mount technology; Capacitors; Coupling circuits; Electromagnetic interference; Equations; Inductance; Length measurement; Low pass filters; Magnetic analysis; Magnetic separation; Microstrip;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility, 2009 20th International Zurich Symposium on

Conference_Location

Zurich

Print_ISBN

978-3-9523286-4-4

Type

conf

DOI

10.1109/EMCZUR.2009.4783470

Filename

4783470