Graphic and text let you understand the process of EMI electromagnetic interference propagation

Electromagnetic interference is the most common problem in electronic circuit design. Designers are always looking for ways to completely eliminate or reduce electromagnetic interference, or EMI. But to completely eliminate EMI interference, the first thing you need is to understand what EMI is and what its propagation process is. This article will give a general introduction to the EMI propagation process.

EMI is a general term for electromagnetic interference, but in fact, electromagnetic interference is divided into two types, one is to transmit interference, and the other is radiation interference. Conducted interference is mainly caused by interference signals generated by electronic devices transmitted through wires or common power lines, causing interference with each other. Further subdivision, conducted interference is divided into common mode interference and differential mode interference.

EMI propagation process

EMI propagation process

The propagation process of EMI mainly passes through three parts, the interference source, the interference path, and the receiver. The source of interference can be understood as the interference that the device discovers and the path of infection. For the power supply, it is generally only possible to start from two aspects, either to reduce the interference source or to cut off the interference path.

Graphic and text let you understand the process of EMI electromagnetic interference propagation

To quickly understand the propagation of EMI, I want to analyze the higher harmonics of these different waveforms in Figure 2. As shown in Figure 2, I first perform FFT on several different waveforms to see how the higher harmonics are distributed. . The image can be clearly understood through the image.

This paper introduces the process of EMI electromagnetic interference propagation in the way of graphic and textual. It can be seen that the process of electromagnetic interference propagation is not simple, but it is not complicated and difficult to understand. Only after fully understanding the principle of EMI can EMI be effectively evaded and suppressed. I hope everyone can have a better understanding of EMI after reading this article.

PCD Inserts

PCD Inserts

OPT Cutting Tools Co., Ltd specialize in offering a comprehensive gamut of PCD diamond inserts, Some of our major product include PCD milling inserts and PCD turning inserts. Then, how to identify the different of them? 


Turning is machining that is generally conducted on a lathe. To make it easier to comprehend turning, imagine the machining of a car shaft for example. The workpiece is held by both ends and rotated. Then a tool on a tool post or, if manual, held by hand is moved into the workpiece to carry out the machining.

PCD Turning InsertsPCD Milling Inserts


Milling is opposite to that of turning.(major product:  pcd inserts   PCD cutting inserts PCD Milling Inserts  PCD Grooving Inserts) When milling the workpiece is stationary and the tool is rotated. As the tool rotates one or more of the cutting edges engages with the workpiece and removes material. Therefore due to the action of the cutting edges coming into and out of contact with the workpiece the machining is interrupted machining. As the cutting edges engage and disengage with the workpiece the cutting edges are subjected to severe thermal shock. This is due to the rapid temperatures increase due to friction during the cut and rapid cooling as this cutting edge disengages from the workpiece. Therefore, to enable and achieve highefficiency machining, cutting tool manufacturers strive to improve and develop tool materials and cutting edge geometries. For milling, it is important to select a tool grade material that can withstand severe working conditions and a cutting edge geometry that can maximize the performance of the cutter.

Generally, PCD inserts are identified by different geometry by using letters of the alphabet. A wide range of geometries are listed as standard, Here we present some of PCD diamond inserts which widely used.


pcd cutting inserts

pcd inserts

product catagory :

pcd inserts


4product detail-fanyi


PCD Inserts


pcd inserts


 We are specialize in manufacturing PCD diamond tools and Carbide tools. Our major product inclulde PCD inserts, PCD Reamers , PCD End Mills, PCD Taps, Cabide Inserts,Carbide Drills, Carbide Reams, Taps etc., 

we also offered customized cutting tools per drawings, and provide package according to customer requirements. We manufacture a series range of cutting tools for machining of Cast iron, Aluminium alloy and Non-Ferros metal, it is widely used in all major sectors like Automobiles, Engineering, Aerospace, Aviation and 3C industry. Premium quality of raw material is used in the production and strict examination during processing with advanced equipment, so our client are satisfied with our reliable quality and on-time delivery. 

Our best selling of cutting tools include PCD Inserts, PCD End Mill, PCD Ball Nose Mill, PCD Reamer, Carbide Taps , Carbide End Mill, Special Form Cutter and many more. For these years we have been made a large forward in the technologies of manufacturing cutting tools. With high quality on performance and price, our product sells well both on domestic and overseas market. And we will always focus on the quality and best service, to make long business relationship.

banggong huang jing

quanlity control:

We have dedicated team of quality control and precise equipment to keep good and stable performance for our products and processing services.

great service


Chip Breaker,PCD Indexable Inserts,Diamond Blade,PCD Chipbreaker Groove Blade

OPT Cutting Tools Co., Ltd. ,