Electroless nickel plated composite textile materials for electromagnet compatibility

35-41A study on electromagnetic shielding effectiveness of electroless nickel plated copper core with polyester sheath yarn composite fabrics through Taguchi design and ANOVA has been reported. The electromagnetic shielding effectiveness of these conductive composite fabrics has been measured in the frequency range 200 - 1000 MHz using network analyzer equipment. It is observed that with an increase in palladium chloride and nickel (II) sulphate concentrations, the shielding effectiveness increases. The ANOVA results show that the time and temperature are negligible factors as compared to other factors

Electromagnetic shielding effectiveness of copper core yarn knitted fabrics

149-154A study on electromagnetic shielding effectiveness of copper core yarn knitted fabrics through Taguchi design and ANOVA has been reported. The copper is selected as the conductive filler to produce copper yarns for making knitted fabric. The electromagnetic shielding effectiveness of these knitted fabrics has been measured in the frequency range 20-18000 MHz using network analyzer equipment. It is observed that with an increase in tightness factors, wale density and course density, the shielding effectiveness increases. The interlock knitted fabric has better electromagnetic shielding effectiveness than rib and plain knitted fabrics. With an increase in copper wire diameter, a decrease in shielding effectiveness is observed

Electromagnetic shielding tester for conductive textile materials

361-365Electromagnetic shielding tester has been modified to measure the electromagnetic shielding effectiveness (EMSE) of conductive textile materials using the frequency range 500 MHz - 12 GHz. Various conductive copper filler fabrics have been produced and tested for their electromagnetic shielding effectiveness using both newly modified electromagnetic shielding tester and network analyzer tester (MIL-STD 285), and the values obtained by both the testers are compared and correlated. It is observed that the values measured by the newly modified electromagnetic tester show good EMSE than the network analyzer standard values in the high frequency range 8-12 GHz. The modified system can be used to measure the EMSE of conductive textile materials in the high frequency range 500MHz-12 GH