RF/Radiated Immunity Testing

RF/Radiated Immunity Testing Overview

Notice: This information is a brief, elementary overview for someone looking to perform precompliance RF/radiated testing in an effort to pass EN/IEC 61000-4-4. For step by step test procedures you will need to purchase the test standard for detailed instruction.

What is RF/Radiated Immunity Testing

In our industry, Testing RF/radiated immunity is commonly done in a controlled environment, with the goal of passing a compliance standard. However, with 5G, IOT, and the overall increasing use of many wireless bands, radiated immunity tests could be performed in other scenarios to assess the reaction of infrastructure. Typically, test levels from a standard should ensure proper operation of your product and other electronics around.

Is Radiated Immunity Testing Safe?

Generating electromagnetic radiation is the most hazardous test method in the EMC/EMI world. Utilizing unreliable equipment, RF enclosures or bad testing practices can increase the risk of exposure to electromagnetic fields, AKA radiation. So be safe, smart and patient. :P

Non EMC RFI Applications

Workplace Safety
Site Validation (Cell towers, Railway, etc)
RF Interference Identification
Environmental Surveying

Seting Up For A Radiated Immunity Test

Determine:

size of the EUT
representative operating conditions of the EUT
whether the EUT shall be tested as table-top or floor-standing, or a combination of the two
for floor-standing equipment, the height of the support
the type of test facility to be used and the position of the radiating antennas
the type of antennas to be used
the frequency range, dwell time and frequency steps
the size, shape and height of the uniform field area
whether any partial illumination is used the test level and modulation to be applied
the type(s) and number of interconnecting wires used and the interface port (of the EUT) to which these are to be connected
the performance criteria which are acceptable
a description of the method used to exercise the EUT.