Radiated Immunity Testing

Exploring Radiated Immunity Testing

The fundamental principle underscoring radiated immunity testing lies in replicating real-world scenarios where electronic devices might be exposed to diverse electric field disturbances during regular operation. These disturbances can range from the proximity of a cell phone to the operation of nearby motors, encompassing an array of electric field sources capable of interacting with the device under scrutiny.

Assessing Performance Amidst Electric Field Disturbances

The core objective of the radiated immunity test is to evaluate the performance of a product when subjected to an electric field of specific amplitude, quantified in volts per meter, across a spectrum of frequencies. By subjecting the device to such controlled conditions, manufacturers gain invaluable insights into its resilience and ability to function effectively amidst electromagnetic interferences.

Navigating the Radiated Immunity Field

During the radiated immunity test, the equipment undergoes exposure to a uniform electric field meticulously calibrated by the test lab across various points within the designated test area. This calibrated field serves as the litmus test for gauging the device’s response and resilience in the face of electromagnetic challenges.

Unveiling the Process

The generation of the electric field unfolds through a systematic process involving a signal generator, a modulated sine wave, a broadband RF power amplifier, and a transducer, commonly referred to as an antenna. The signal generator dispatches a modulated sine wave to the RF power amplifier, which in turn amplifies the signal. Subsequently, the transducer converts the varying conducted voltage into a fluctuating radiated electric field, replicating real-world electric field disturbances.

Customizing Modulation Parameters

In typical scenarios, the radiated electric field is modulated at 80% with a 1 kHz sine wave. However, it’s imperative to note that certain standards may necessitate variations in modulation frequency and depth to ensure comprehensive testing and compliance.