• 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