3M 1120 CIRCLE-0.75"-250

Series:	1120
Part Status:	Active
Type:	Shielding Sheet
Shape:	Circular
Length:	--
Width:	0.750" (19.05mm)
Thickness - Overall:	0.004" (0.10mm)
Operating Temperature:	--
Adhesive:	Conductive, Single Sided
Material:	Aluminum Foil

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RFI and EMI - Shielding and Absorbing Materials

Introduction

Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI) have been known to cause a number of issues for many electronic systems. EMI and RFI are defined as the interference of an electromagnetic signal or a radio signal with the normal operation of a system. This interference is caused by unwanted emissions either from external sources, or from components of the system itself. To overcome this, shielding and absorbing materials are used to reduce the effects of interference and to improve system performance.

3M 1120 CIRCLE-0.75"-250: Application field and working principle

One product used to reduce RFI and EMI is 3M 1120 CIRCLE–0.75”–250. The product is designed to provide a wide range of shielding and absorbing effects for improved system performance and reliability. It uses a combination of materials designed to contain, absorb, and reflect electromagnetic radiation.The 3M 1120 CIRCLE–0.75”–250 is designed for use in a number of applications including telecommunications, automotive, aerospace, and electronics. It is also suitable for shielding against EMI/RFI in sensitive areas such as hospitals and laboratories.The product uses a metal-foam composite material which is sealed in a Mylar surface material. This combination creates a highly effective shielding product. The metal-foam core has a very high permeability shielding scrim which contains two layers of dense conductive metal mesh which reflects incoming radiation, as well as containing a high absorption material which is designed to stop radiation from entering the product.In addition to its shielding capabilities, the 3M 1120 CIRCLE–0.75”–250 also has a very high absorption rate, stopping up to 80% of EMI/RFI radiation. This is due to the combination of metal, foam, and scrim layers within the product. The metal creates a highly reflective surface, while the foam and scrim create a highly absorbent surface. This combination ensures that the product is able to stop most incoming radiation, while also protecting sensitive components from outside interference.

Conclusion

The 3M 1120 CIRCLE–0.75”–250 is an effective shielding and absorbing material which is designed to reduce the effects of EMI/RFI interference on sensitive systems. It is designed to be used in a variety of applications, including telecommunications, automotive, aerospace, and electronics, as well as in sensitive areas such as hospitals and laboratories. The product uses a combination of materials to create a highly effective reflective and absorbent surface, ensuring that it is able to reduce the effects of EMI/RFI interference on any system.

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