Recent empirical testing of FerriShield Ferrites shows that
there is a notable increase in Ohms of impedance when compared to the exact
same competitive alternative. Due to an industry-wide shift in raw material
formulation and manufacturing processes, many RFI/EMI ferrites on the market
are delivering lower performance across a wide-band frequency range. This
variation is an important design consideration for most commercial, military
and consumer electronics manufacturers because in order to attain the desired
level of EMI/RFI suppression, a larger and therefore heavier ferrite must be specified.
These physical characteristics typically conflict with target engineering and
market demands for smaller, lighter-weight electronic devices.
For the purposes of testing, Leader Tech engineers selected
one of the Company’s most popular FerriShield 28 Material Ferrites with a true
850 permeability. Competitive ferrite samples that exhibited the exact
dimensions (outside diameter, inside diameter and length) as well as published
permeability were procured for testing. All ferrites in the sample group were
analyzed on the same test wire using an Agilent 4396B RF
Network/Spectrum/Impedance Analyzer and an Agilent 16192A test meter. Broadband
frequencies ranging from 1 MHz to 400 MHz were generated across the test wire
and ferrite impedance in Ohms was recorded. The FerriShield 850 perm material
outperformed the other ferrites in the test group from 25MHz all the way
through the 400MHz range.
The performance variations among manufacturers that offer
850 permeability wideband ferrites are noteworthy. As engineers struggle to
eliminate unwanted radio and electromagnetic interference and minimize space
and weight allocations, the selection of a high-performance ferrite becomes
increasingly important.
“The results of our recent performance tests are impressive.
If a manufacturer is looking for the industry’s highest-performance solid or
bisected ferrite, they can feel confident in selecting a FerriShield product
from Leader Tech”, states Blake Roberts FerriShield Product Manager. In
addition to offering the world’s largest, in-stock selection of ferrite sizes
and styles, Leader Tech has made a major commitment to providing unrivaled
technical support from its Global EMI Shielding
Technology Center
in Tampa, Florida
as well as the Company’s own network of dedicated Regional Sales Engineers.
