Characterization of ferrite surface mount bead using S-parameters

Abstract

In this paper, characterization of ferrite surface mount bead based on S-parameters measurement, using vector network analyzer E5071B and specially developed PCB test fixture, are presented. The validation of characterization method was performed using commercially available ferrite component, the surface mount 4-way bead. It is shown that proposed approach is efficient in predicting and analyzing the ferrite bead performance, not only in standard frequency range bellow 100 MHz, but also in high frequency range up to 1GHz.

Characterization and modelling of miniature ferrite transformer for high frequency applications

“…The mutual inductance is relatively low, since the conductive lines in ferrite bead are distant from each other, and the coupling between coils is weak. The same conclusion was made in Damnjanovic et al (2010a, b), when the same component was characterized as EMI suppressor. The measured values of transformer TR3 are shown in Figure 10.…”

“…Layout for de‐embedding of parasitic effect of the 2‐turns transformers is shown in Figure 7. The procedure of parameter extraction of the ferrite transformer is discussed with more details in Damnjanovic et al (2010a, b). Additionally, in that paper was shown that the de‐embedding of parasitic effects was necessary in the frequency range over 100 MHz, in order to provide accurate enough characterization results.…”

“…In our previous work (Damnjanovic et al , 2010a, b), we proposed a method for characterization of the ferrite transformers (component with four terminals) using VNA, based on extraction of measured S‐parameters. The main advantage of this method is that the S‐parameters can be easily and accurately measured and compared with other parameters in the high frequency range.…”