Title :
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
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;
Conference_Titel :
Electromagnetic Compatibility, 2009 20th International Zurich Symposium on
Conference_Location :
Zurich
Print_ISBN :
978-3-9523286-4-4
DOI :
10.1109/EMCZUR.2009.4783470
