Duofoil®
Consists of an aluminium - polyester - aluminium laminate
wrapped around the cable's dielectric core. Provides 100%
physical coverage, and improves shield reliability and flex
life.
Belden COT also utilizes a number of innovative techniques to
apply shielding to multi-conductor and paired cables
"French Braid" Shields
Belden COT's patented "French Braid" shield is a double
spiral (double serve bare copper shield) with the two spirals
tied together by one weave.
Shorting Fold
Belden COT uses a shorting fold technique to maintain
metal-to-metal contact for improved high frequency performance.
Without the shorting fold, a slot is created through which
signals can leak and cause interference. (See Figures 1 and 2
above.)
Z-Fold®
Belden COT improves on the traditional shorting fold by
employing a Z -Fold designed for use in multi-pair applications
to reduce crosstalk. The Z-Fold combines an isolation and a
shorting fold. The shorting fold provides metal-to-meta contact
while the isolation fold keep~ shields from shorting to one
another multi-pair, individually shielded cable
The use of either a shorting fold or a Z -Fold increases the
foil shield's range of effectiveness to higher frequencies. |
|
Foil shield configuration with shorting fold
Foil shield with Z-Fold reduces crosstalk in multi-pair
applications |
