In today's era where electronic devices are everywhere and electronic signals are messy, EMI is very critical. Let’s first talk about what EMI is. It is actually electromagnetic interference. Simply put, it is when various electronic equipment is working.
Because there are too many electronic components, there is a lot of interference between radio waves and magnetic waves. If not controlled. Some precision electronic equipment, such as some core electronic components of electronic instruments and communication base stations in aerospace equipment. Their performance will be severely degraded, and they may even break down or completely stop working.
So, what exactly is EMI (electromagnetic shielding solution)? This requires the use of different technologies, such as products such as conductive paint or coating, such as some small electronic equipment products, small consumer electrical equipment such as mobile phones, tablets, and wearable devices.
We can apply such conductive paint on areas that are prone to emit electromagnetic interference or are particularly susceptible to electromagnetic interference. Another method like metal shielding is often used in computers, especially servers, which have high anti-interference requirements for data communication. Adding a metal shield to the equipment can mostly prevent external electromagnetic interference from entering.
It has certain resistance to interference problems outside the equipment. Here, I would like to remind you. We can look at it from two aspects. On the one hand, product materials should be made of electronic materials with better anti-electromagnetic interference performance. You might think that if electronic components are easily interfered with or emit interference at the beginning, big problems will definitely occur later.
On the other hand, when designing, it is necessary to strictly plan which areas are more sensitive to the electromagnetic environment and which areas are prone to electromagnetic waves causing interference sources. This planning is very important. For example, if electronic circuits surround each other too much, serious electrical and magnetic field interference will occur!
Let’s focus on answering common questions below:
1. My TV’s screen suddenly became severely blurred. Is it electromagnetic interference? This is really possible, if there are high-power broadcasting equipment nearby or large-diameter magnets moving at close range, which are prone to emitting strong electromagnetic interference. When this is severe, it can affect the stability of the TV's internal circuitry.
2. If I were an engineer, how would I determine what kind of electromagnetic interference is allowed to exist and what is the threshold? This often changes according to different fields and standards. For example, in the medical electronics category, even a slight interference to the electrocardiogram test instrument will cause a large error in the data.
3. Can you tell me the specific characteristics of various types of EMI shielding materials now? For example, rubber containing carbon powder can act like a small conductive bridge to block or divert electromagnetic energy; besides, the conductive nylon fabric is not only flexible, but also has certain auxiliary blocking operations against external electromagnetic influence. Finally, metal plates are the simplest and most straightforward to form a solid physical electromagnetic isolation shield.
How to choose appropriate electromagnetic shielding in different fields? When it comes to consumer electronics, you can mainly choose shielding solutions that are relatively light in weight and whose thickness will not greatly affect the appearance of the device.
Industrial equipment emphasizes durability, resistance to temperature changes and other environmental factors. It is more suitable for some special manufacturing metals, etc. In terms of shielding effect, some special electronic products, such as military communication products or aviation equipment, require extremely high shielding efficiency.
In short, based on different performance requirements, a comprehensive study, analysis and consideration of material properties must be conducted.
Having said that, I personally feel that it cannot be underestimated, whether it is the development of technology or the convenience of simple ordinary life.
Stable and smooth operation of the equipment, good use and reasonable application of accurate and effective electromagnetic shielding solutions. It is really an inseparable and closely related relationship. It is like a hero behind the scenes that affects the normal operation and development of a large number of electronic devices! Provide global procurement services for weak current intelligent products!
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