When electricity flows in the body, energy will escape into the air, which is called electromagnetic waves. These complex electromagnetic waves, if their energy is large enough, can cause electromagnetic interference (EMI) and thus affect the function of the product and environmental pollution and human health. Some medical literature points out that regardless of the source of electromagnetic waves from electrical equipment, high-voltage power lines or household appliances, as long as the background value of electromagnetic waves in the environment is greater than 2 milligauss, it will increase the incidence of blood cancer. The American Science Journal has reported that there is evidence that electromagnetic waves exceeding 60 MHz cause damage to the structure of human cells, especially the impact of mobile phones on the human brain, including amnesia and decreased behavior.
In order to reduce the harm of electromagnetic waves, radio wave absorbing materials are increasingly used in various electronic products. Such as mobile phones, computers, microwave ovens, signal base stations, etc. What is electromagnetic absorption material? The electric wave absorbing material is a function of cutting an incident electric wave to weaken its energy, thereby reducing the external radiation of the electric wave. It can be attached to the surface of any electronic component without changing the characteristics of the circuit. It can directly block or reduce the radiation of the EMI signal source. It can cut the shape of the base as the organization needs it.
Electromagnetic radiation pollution is a major problem of global concern, and it is inevitable to contact an environment with electromagnetic pollution. International EU CE, North American FCC, etc. have long put forward clear requirements for electromagnetic compatibility and safety certification. Many companies' product designs ignore the consideration of EMI and safety regulations, resulting in a significant reduction in product speed to market. Absorbing products can provide electronic manufacturers with more convenient EMI solutions.
The following compares common EMI countermeasures
The main application areas of absorbing materials are as follows:
· GSM, CDMA, WCDMA, PHS...
· Handy phone, Smart phone, PDA Phone, Video phone...
· Digital Camera, Camera phone, MP-5...
· Notebook, PC, LNB, Set top bos ......
· WLAN, RF Modules
· Shielding Box, DVD, VCD, VOIP...
· OA transaction machine, monitor, card reader
· Internet phone, webcam, wireless charging, etc. ......
The following is the selection of absorbing materials for different frequency segments.
Industry Control Circuit Board
Industry control printed circuit boards (PCB)
1. For industrial control, special or general-purpose circuit board, the bottom circuit is completed, and IO is reserved. After buying the industrial control circuit board, the input and output ports reserved on the circuit board are connected to the user's own device, such as motor, solenoid valves, sensors, thus completing the function want to accomplish.
2. The special circuit board is a board specially designed for a certain function, such as the temperature control circuit board. After buying it, the input port is connected to the thermocouple, and the output port is connected with a heating contactor or a solid state relay to control the heating device to complete the temperature control. There are flow control boards, motion control boards, etc.
3. The universal control board, most of which can be programmed, after the user's own secondary development, completes a specific function, and has a wide range of uses. For example, plc is a general industrial control board. After the user writes the program and compiles the input, various functions can be completed. Digital input, analog input port, high-speed counter port, digital output port, analog output port, and some also have communication function.
Industry Control Pcb,Electronic Control Board,Industrial Controller Circuit Board,Industrial Control Printed Circuit Board
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