• Shielding Effectiveness of Conductive Textiles• Performance of Conductive Zippers• Shielding Enclosures for Protection of Electronic Equipment
�High Surface Conductivity
�Simple to Contact
�High Shielding Effectiveness
�Sensitive against mechanical
Stress
� Synthetic Fibres� Silver coated Surface
�B1 Endless Metal Filament: DC-Conductive
� Filament silver coated or lacquered�
�B2 Metal Fibres: Low DC-Conductivity
�B3 Fabric with interwoven Metal Grids�
� Synthetic Nomex Fabric� Steel Fibres in the Core
of the Yarn� l = 20 mm�d = 20 um
� Syntetic Fibres� interwoven endless copper Filament, silver coated
�d = 20 um
0
10
20
30
40
50
60
70
80
0 0,2 0,4 0,6 0,8 1 1,2 1,4 1,6 1,8 2
f/GHz
SE_E
/dB
PM 30 FR PM 12-4 CCIS 2091 PCCS 2131 Coated Cu-Blech
0
5
10
15
20
25
30
35
40
45
50
0 1 2 3 4 5 6 7 8 9 10
f/GHz
SE_E
/dB
PM 30 FR PM 12-4 CCIS 2091 PCCS 2131 Coated
�Conductive Textiles with
interwoven Silver Filaments
�Zippers with Metal Teeth
�Proper Contact between Teeth and
Silver Filaments
Broken Filaments
Intact Filaments
Measurement Setup
Measurement Results
Closed Zipper
Open Zipper
Slot without Zipper (calculated)
Slot without Zipper (measured)
a)
Open Zipper
Conductive Fabric
control-computer
generator+
amplifier
measurementequipment
GPIB-Bus
waveguide
EUT
probe
fiber-optical links
transmitter
106 107 108 109 1010
)(1 ωjE
frequency / Hz
10-10
10-8
10-2
10-4
10-650 %
90 %100 %
tr
fwhm
)()( tt eeEtE αβ −− −= 01�
10 %
)(1 tE�
time / s
b)a)
ωαωβω
jE
jEjE
+−
+= 00
1 )(
Perturbation Breakdown Destruction
Perturbation Failure Rate Breakdown Failure Rate Destruction Failure Rate
PulsesofNoBitslostofNoPFR
..====
PulsesofNoBreakdownsofNoBFR
..====
PulsesofNonsDestructioofNoDFR
..====
Pulse Pulse Pulseno Resetnecessary
-Self Reset,-External Reset-Power Reset
Delay Time
BFR
0
0,25
0,5
0,75
1
0 5 10 15 20 25 30 35 40
E in kV/m
1 2 3 41 2 3 41 2 3 4
AT90S8515
40pin
-withoutShielding
-with Shielding-open Zipper (≈1cm)
-with Shielding-closed Zipper
BFR
0
0,25
0,5
0,75
1
0 5 10 15 20 25 30 35 40
E in kV/m
1 2 3 41 2 3 41 2 3 4
AT90S2333
28pin
-withoutShielding
-with Shielding-open Zipper (≈1cm)
-with Shielding-closed Zipper
BFR
0
0,25
0,5
0,75
1
0 5 10 15 20 25 30 35 40
E in kV/m
1 2 3 41 2 3 41 2 3 4
AT90S1200
20pin
-withoutShielding
-with Shielding-open Zipper (≈1cm)
-with Shielding-closed Zipper
BT in kV/m
05
10152025303540
AT90S8515 AT90S2333 AT90S1200ohne Schirmungmit Schirmung, Reissverschluss offen (1cm)mit Schirmung, Reissverschluss geschlossen
without shieldingwith shielding, open zipper (1cm)with shielding, closed zipper
0
0,25
0,5
0,75
1
0,00 5,00 10,00 15,00 20,00 25,00 30,00 35,00 40,00
E in kV/m
BFR
Rocky 518 HV ohne SchirmungSSC-5x86H ohne SchirmungRocky 518 HV mit SchirmungSSC-5x86H mit Schirmung
Rocky 518 HV without shieldingSSC-5x86H without shieldingRocky 518 HV with shieldingSSC-5x86H with shielding
�Marginal Decrease of Shielding
Effectiveness by Highly
Conductive Zippers
�Significant Decrease in Shielding
Effectiveness even by small
Apertures