WDR Electromagnetics maintains that shielding, a mitigation method used to essentially block electromagnetic radiation/interference, should be used only in specific applications and as an absolute last resort. It must be noted that most field remediation efforts to address EMI issues in sensitive equipment can be extremely successful without the use of such an expensive application.
When necessary, however, a host of shielding techniques and materials are available, such as highly conductive and permeable metal plates for electromagnetic fields to complete enclosures for radio frequency fields. Which techniques and materials are used depends upon the type of frequency that needs attenuating.
WDR Electromagnetics works in close collaboration with a world-renown shielding engineering expert that has a proven track record of success to ensure all aspects of clients’ projects are completed in a highly professional, timely, and cost-effective fashion.
◆ Shield Considerations
Many factors affect a shield’s performance. Some of those factors that are included in the design process include:
- Permeability and saturation of the materials used in the shield must be considered in addition to the type of anneal.
- Spherical and cylindrical shaped shields are typically needed, and special handling of joints and seams must be considered to reduce leakage. These methods are employed by the usage of specialty welding techniques as fields resist making sharp turns.
- Shields perform better with increased usage of layers. Thickness of the shield is determined by how much attenuation is needed.
- Other absolutely necessary considerations include, but are not limited to: orientation of the field as it hits the shield, strength, distance, and frequency of the field, as well as temperature of the shield location, vibration, and weight.