As our electronic devices continue to develop and advance at a fast pace, design engineers have been faced with a unique problem, interference. Interference between waves and signals produced by the massive amount of electronics in the world have posed many obstacles.
Electromagnetic interference (EMI) and radio frequency interference (RFI) pose a severe risk to electronic devices in almost every industry. Without proper protection and care, your equipment can suffer from various kinds of malfunctions and sometimes fail altogether. Luckily, there is a cost-effective solution. In this article, we would try to explain what EMI-RFI shielding is and why is that your end products may benefit from an EMI-RFI shielded enclosure.
What does EMI-RFI Shielding mean?
Design engineers must take care to ensure that the device they design and create doesn’t emit such signals and that it meets the various EMI-RFI standards of the state. Generally, designers try reducing EMI through design, but if it isn’t possible, then they use an EMI-RFI shielded enclosure. It has proven to be an effective solution. EMI-RFI shielding can be applied to electronic enclosures from the inside in the form of a spray. This spray is usually applied to plastic enclosures to reduce the effects of interference. Another type of EMI-RFI shielding can be brushed on the exterior of the cabinet to minimize interference. This kind of shielding agent typically consists of pure elements like silver, copper, and nickel in order to reflect electromagnetic radiations.
Why Opt for an EMI-RFI Plastic Enclosure?
Enclosures made from highly conductive materials such as silver, aluminum or copper are ideal for EMI-RFI shielding. They act as a natural barrier to these signals. However, this is not always a cost-effective solution for design engineers. Sometimes, it is a more pragmatic approach to use EMI-RFI shielding spray on plastic enclosures to boost the electromagnetic compatibility of various electronics. These shielded coatings reflect the interfering radiation and protect your electronic devices. This does not mean that you can’t use other materials to protect your devices from electromagnetic interference. Materials such as aluminum enclosures are effective at reflecting electromagnetic energy. However, a metallic box isn’t always feasible for specific electronic design projects. Although aluminum is exceptionally durable, it may not be a good fit for projects in temperature-sensitive environments.
EMI-RFI Shielding Considerations
All electronics items emit some small amount of signals, but some don’t require a secure layer of protection. On the other hand, some applications require significant protection against EMI-RFI, and hence designers must wisely pick the enclosure (with reliable protection). Although shielding can be applied after the design of a product, it is generally more cost-effective for engineers to design shielding into the product at the beginning of the design process. It is also important to note that enclosures with apertures can use a specialized gasket to improve shielding effectiveness.
With the explosion of electronics in recent years, reliable EMI-RFI shielding has become more crucial than ever. To protect your equipment from a potential interference, it is vital to consider an EMI-RFI shielded enclosure which can reliably house your sensitive electronics.