 The form of electromagnetic interference |
 The main form of electromagnetic interference |
The electromagnetic interference problem is a key issue in any hardware design field. It is especially important to understand the initial dry electromagnetic interference problem to solve this problem.
The electromagnetic interference model has three basic elements:
- There is electromagnetic interference energy.
- There is a device that is subject to electromagnetic interference.
- There is a coupling channel to transmit electromagnetic energy between the interfered and interfered devices.
Electromagnetic interference only occurs when these three basic elements are met at the same time. EMC engineers should determine the EMC design content and design direction based on the physical structure.
The EMC analysis template is determined by the electrical length of the structure. Converting the physical dimensions of the device structure to electrical length is the starting point for design and problem finding. The combination and connection of templates constitute a model for analyzing electromagnetic compatibility problems. The template analysis method is to select the appropriate template and electromagnetic logic connection according to the actual problem and structure to form a dynamic process of complete electromagnetic interference phenomenon.
The EMC design of printed circuit boards is the cheapest and most effective way to eliminate the main sources of RF interference. When the interference source on the printed circuit board and the victim device exist in the same small space, the engineer must control the electromagnetic energy generated. This means that electromagnetic energy is only present at the required assembly parts. This is the method of removing EMC problems, electromagnetic suppression or electromagnetic cancellation.
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