Q.Since chip beads are EMC components, is there any need to make ground connections?
EMC Components > EMC Components > Chip Beads
Ground connections are not needed.
Chip beads are different from bypass capacitors and 3-terminal filters, which induce noise on ground, in that they absorb noise with the resistance component R to convert it into heat.
Q. Can mounting chip beads for the low-frequency band in series with the chip beads for the GHz band allow the obtaining of both characteristics? Also, should there be any problems if multiple chip beads are mounted in series?