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Radiation anti-interference
Test the immunity of the tested equipment to electromagnetic interference in space
Radiated Immunity Test is an important component of Electromagnetic Compatibility (EMC) testing, used to evaluate the anti-interference performance of Equipment Under Test (EUT) under space electromagnetic interference. This test simulates the electromagnetic interference that the device may encounter in actual usage environments (such as radio waves, radar signals, mobile phone signals, etc.), ensuring that the device can still function normally in the interference environment.
Test purpose
The main purpose of radiation anti-interference testing is to verify whether the equipment can maintain normal function without performance degradation, misoperation, or damage when subjected to external electromagnetic field interference. This is crucial for ensuring the reliability and safety of equipment, especially in critical areas such as healthcare, aviation, automotive, and industrial control.
Test Standard
Radiation anti-interference testing is usually conducted according to international or industry standards, and common standards include:
IEC 61000-4-3: Radiation immunity testing standard developed by the International Electrotechnical Commission (IEC).
EN 61000-4-3: European standard, consistent with the content of IEC 61000-4-3.
FCC Part 15: Electromagnetic Compatibility Requirements for Electronic Devices by the Federal Communications Commission (FCC) in the United States.
CISPR 24: Immunity standard for information technology equipment.
ISO 11452-2: Standard for Radiated Immunity Testing of Automotive Electronic Equipment.
test method
Test environment:
Testing is usually conducted in an anechoic chamber to avoid external electromagnetic interference affecting the test results.
The inner wall of the anechoic chamber is covered with absorbing materials to reduce the reflection of electromagnetic waves.
Test equipment:
Signal generator: generates electromagnetic waves of specific frequency and intensity.
Power amplifier: amplifies the output power of a signal generator.
Transmitting antenna: radiates electromagnetic waves to the device under test.
Monitoring equipment: used to monitor the working status and performance of the tested equipment.
Test steps:
Place the test equipment on the test bench in the anechoic chamber and connect the necessary power and signal lines.
Set the frequency range and modulation method of the signal generator according to the testing standards (such as continuous wave, pulse modulation, etc.).
Radiate electromagnetic waves to the device under test through a transmitting antenna, gradually increasing the field strength (usually from 1 V/m to 10 V/m or higher, depending on standard requirements).
At each frequency point and field strength, observe whether the tested equipment exhibits performance degradation, misoperation, or damage.
Record the test results, including the response of the tested equipment and any abnormal phenomena.
Test frequency range:
The usual testing frequency range is 80 MHz to 6 GHz, covering common radio, television, mobile phone, and wireless network signals.
For specific applications such as automotive electronics, the testing frequency range may vary.
Test result evaluation
According to the standard, the tested equipment should maintain normal operation during the testing process without significant performance degradation or functional failure.
Failure criteria: If the device experiences performance degradation, misoperation, or damage during testing, it will be considered a test failure.
Rectification measures: For devices that fail the test, measures such as shielding, filtering, or circuit design optimization may need to be taken to improve their anti-interference ability.
Application field
Radiation anti-interference testing is widely used in the following fields:
Consumer electronics: such as mobile phones, computers, household appliances, etc.
Industrial equipment: such as PLC, frequency converter, industrial robots, etc.
Automotive electronics: such as in car entertainment systems, autonomous driving sensors, etc.
Medical equipment: such as electrocardiographs, ultrasound devices, etc.
Aerospace: such as aircraft communication systems, navigation equipment, etc.
Through radiation anti-interference testing, it can ensure the stable operation of equipment in complex electromagnetic environments, meet regulatory requirements, and improve user satisfaction.
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Testing/year
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