ISO 11452 is a series of standards from International Organization for Standardization that specifies limits and test methods for electromagnetic compatibility (EMC) testing for road vehicles and their components under various environmental conditions. It covers the measurement procedures and test apparatus required for performing different EMC tests on electronic components in vehicles like radiated emissions, radiated immunity, conducted emissions, and conducted immunity.

The specific test apparatus required for ISO 11452 tests may vary depending on the test method and frequency range being evaluated. Some of the main test apparatus/environments for ISO 11452 include: 

Transverse Electromagnetic (TEM) Cell: Used for radiated immunity testing. It creates a controlled electromagnetic field environment to expose the test sample to radiated disturbances.

Bulk Current Injection (BCI) Probe: Used for conducted immunity testing. The BCI probe injects a disturbance current into the wiring harness or power supply lines of the test sample to simulate conducted disturbances.

Absorber-lined Chamber: A shielded enclosure lined with specialized absorbing materials to minimize external electromagnetic reflections during radiated immunity testing.

RF Signal Generator: Used to generate electromagnetic disturbances at specific frequencies and amplitudes for both radiated and conducted immunity testing.

Power Amplifier: Amplifies the signals generated by the signal generator to achieve the desired field strengths during radiated immunity testing.

Reverberation Chamber: A specialized test environment that creates a highly reflective electromagnetic field to simulate real-world conditions during EMC testing. The chamber consists of highly reflective walls, often made of conductive material, which allows electromagnetic waves to bounce around and create a statistically uniform field. This helps simulate complex electromagnetic environments, such as reflections and multipath effects, to evaluate the performance of electronic components and systems.

Tubular Wave Coupler (TWC): A test apparatus that uses a cylindrical waveguide structure to generate and radiate a controlled electromagnetic field for evaluating the immunity/susceptibility of electronic equipment to radiated disturbances in automotive EMC testing.

ISO 11452 is subdivided into different parts focusing on different aspects of EMC testing. Some of the commonly referenced parts of the ISO 11452 Standard are:

ISO 11452-1: General principles and terminology: This subpart contains general information, definitions, and guidelines for all other parts of ISO 11452.

ISO 11452-2: Absorber-lined shielded enclosure: This section of ISO 11452 provides an absorber-lined shielded enclosure technique for assessing the immunity (off-vehicle radiation source) of electronic components for passenger automobiles and commercial vehicles.

ISO 11452-3: Transverse electromagnetic mode (TEM) cell: This section defines transverse electromagnetic (TEM) cell tests for testing the immunity of electronic components of passenger cars and commercial vehicles to electrical disturbances from narrowband radiated electromagnetic energy.

ISO 11452-4: Bulk current injection (BCI) method: This defines bulk current injection (BCI) test method and tubular wave coupler (TWC) test method and procedures for testing the immunity of electronic components of passenger cars and commercial vehicles.

ISO 11452-5: Strip line: ISO 11452-5 provides detailed procedures for conducting the stripline test, including the dimensions and characteristics of the stripline structure, the equipment setup, the test conditions, and the performance criteria. The standard outlines the steps to generate and measure the electromagnetic field strength and assess the immunity of the device or system under test.

ISO 11452-7: Direct radio frequency (RF) power injection: The direct RF power injection test method outlined in ISO 11452-7 involves applying RF signals directly to the input or output ports of the device under test. This simulates the effect of RF energy coupling into the device through cables, connectors, or other external interfaces.

ISO 11452-8: Immunity to magnetic fields: The test method described in ISO 11452-8 involves subjecting the device under test to controlled magnetic fields and assessing its performance and functionality. The standard defines the measurement techniques and procedures for evaluating the device's immunity to magnetic fields, taking into account factors such as the device's susceptibility, functionality, and safety.

ISO 11452-9: RF immunity test methods and limits for passenger vehicles: ISO 11452-9 specifies test methods and procedures for testing the electromagnetic immunity of electronic components for passenger cars and commercial vehicles to portable transmitters in close proximity. The standard covers the frequency range from 142 MHz to 6 GHz.