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Radiated Immunity Compliance Testing

Radiated Immunity Testing

Radiated immunity testing evaluates the ability of electronic devices to operate as intended when exposed to electromagnetic fields from external sources. These fields can couple into a device’s circuitry, causing interference, malfunctions, or even permanent damage. Radiated immunity testing ensures that electronic devices can withstand electromagnetic disturbances without experiencing performance degradation, enhancing their reliability and safety.

Standards and Regulations for Radiated Immunity Testing:

Radiated immunity testing standards vary depending on the region and product category. Some of the most common radiated immunity testing standards include:

  1. International Electrotechnical Commission (IEC) 61000-4-3: This standard defines the test methods and requirements for electronic devices to withstand radiated electromagnetic fields in their operating environment.
  2. International Organization for Standardization (ISO) 11452: This standard specifies the radiated immunity test methods and procedures for automotive electronic components.
  3. RTCA DO-160: This standard establishes the environmental test criteria for airborne electronic equipment, including radiated immunity requirements.

Applications of Radiated Immunity Testing

Radiated immunity testing is applicable across various industries, including consumer electronics, automotive, aerospace, telecommunications, medical devices, and industrial equipment. By complying with radiated immunity testing standards, manufacturers can ensure that their products are resilient to electromagnetic disturbances, ensuring reliable operation and coexistence in their respective environments.

Equipment Required for Radiated Immunity Testing

Key equipment used for radiated immunity testing includes signal generators, power amplifiers, antennas, and field probes. Signal generators and power amplifiers produce the required electromagnetic fields, while antennas transmit the fields towards the device under test (DUT). Field probes measure the field strength during the test, ensuring compliance with the specified test levels.

Testing Process for Radiated Immunity

  1. Set up the DUT and test equipment according to the specified standard and test method.
  2. Configure the signal generator, power amplifier, and antenna to produce and transmit the required electromagnetic field.
  3. Perform the radiated immunity test by exposing the DUT to the electromagnetic field, following the test frequencies, field strengths, and test duration specified by the standard.
  4. Monitor the DUT’s performance during and after the radiated immunity test, checking for malfunctions or permanent damage.
  5. If the DUT fails the test, identify the root cause and implement design changes or mitigation techniques to improve radiated immunity performance.

Common Sources of Failures in Radiated Immunity Testing

Radiated immunity testing failures can occur due to various factors, including:

  1. Insufficient shielding: Inadequate shielding of sensitive electronic components can result in excessive coupling of electromagnetic fields, causing interference or malfunction.
  2. Poor component selection: Components with low immunity to electromagnetic fields can contribute to radiated immunity susceptibility.
  3. Design issues: Circuit design issues, such as poor grounding, inadequate separation between noisy and sensitive areas, or incorrect PCB layout, can exacerbate radiated immunity problems.

Mitigation Techniques for Radiated Immunity

Several design and engineering techniques can help improve radiated immunity performance, increasing the likelihood of passing radiated immunity testing:

  1. Implementing proper shielding: Incorporating effective shielding for sensitive electronic components can help prevent excessive coupling of electromagnetic fields, reducing interference or malfunction.
  2. 2. Optimizing component selection: Selecting components with better immunity to electromagnetic fields can contribute to improved radiated immunity performance.
  3. Enhancing grounding and PCB layout: Ensuring good grounding practices, optimizing trace lengths, and separating noisy and sensitive areas can help minimize the impact of electromagnetic disturbances on device performance.

Real-life Example of Radiated Immunity Testing

A leading manufacturer of industrial automation equipment was developing a new robotic arm for use in factory environments. During the EMC testing phase, the robotic arm failed to meet the IEC 61000-4-3 standard for radiated immunity. 

By identifying the root cause of the problem and implementing appropriate design changes, the manufacturer successfully improved the radiated immunity performance of their product. The robotic arm passed the radiated immunity testing and was granted EMC certification, ensuring its reliable operation and coexistence with other devices in the industrial environment.

Radiated Immunity Testing Experts

When you require expert support for your radiated immunity testing needs, look no further than Keystone Compliance. Our ISO-17025 accredited laboratory houses advanced facilities and a team of adept professionals, delivering accurate and reliable testing results. Our expertise in EMC testing, including radiated immunity, is supported by our comprehensive array of additional testing services, such as package and environmental testing.

At Keystone Compliance, we are devoted to assisting you in overcoming testing challenges and ensuring your products comply with the necessary standards. Our exceptional troubleshooting and research and development capabilities make us an indispensable ally throughout your product development journey.

To discover how Keystone Compliance can help you with your radiated immunity testing requirements, visit our website at or call us at (724) 657-9940. Our team of experienced professionals is eager to assist you in navigating the challenges of radiated immunity testing and securing the successful certification of your products.


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