EMI radiation testing is used to evaluate the electromagnetic interference signals radiated by electronic and electrical equipment through space, ensuring that they do not cause harmful effects on other devices or radio communications. The following are the commonly used EMI radiation testing standards in various fields:

1. International standard:

- CISPR 16: Basic Standards for EMI Testing (Measurement Equipment, Methods and Site Requirements)

- CISPR 32/EN 55032: Radiation Emission Limits for Information Technology Equipment (ITE)

- CISPR 32/EN 55032: Electromagnetic Compatibility Requirements for Multimedia Equipment (Replacing CISPR 22 & 13)

- IEC 61000-6-3: General Standard (Limits of Radiation Emission in Residential, Commercial and Light Industrial Environments)

- IEC 61000-6-4: General Standard (Limits of Radiation Emission in Industrial Environments)

2. Regional standards:

North America (the United States & Canada)

- FCC Part 15 Subpart B (United States) : Radiation Emission Limits for Digital Equipment (30MHz - 40GHz)

- ANSI C63.4: American Standard for EMI Radiation Testing Methods

-ICES -003 (Canada) : Radiation Emission Requirements for Information Technology equipment

Eu (CE certification)

-EN 55011: Limits of radiated disturbance for industrial, scientific and medical (ISM) equipment

- EN 55014-1: Limits for radiated emissions from household appliances and power tools

- EN 55015: Radiation emission requirements for lighting equipment

-EN 55032: Limits of radiation emission from Information technology equipment (ITE)

China

- GB 9254: Limits of Radiated Disturbance from Information Technology Equipment (equivalent to CISPR 22/32)

-GB4343.1: Limits for Radiated Emissions from Household appliances and power Tools

-GB17743: Radiation Emission Requirements for Lighting equipment

- GB 4824: Radiation Disturbance Limits for Industrial, Scientific and Medical (ISM) Equipment (equivalent to CISPR 11)

3. Industry-specific standards:

Automotive electronics

- CISPR 25: Radiation emission Limits for vehicles, ships and internal combustion engines

- ISO 11452-2: Automotive Electronics Immunity Test (including radiation immunity)

-UNECE R10 (E-mark Certification) : Automotive Electronics EMC regulations

Military equipment

-MIL-STD-461G RE102 (10kHz - 18GHz) : Radiation emission requirements for military equipment

Avionics

-DO-160 Section 21: Radiation emission test of airborne equipment

Medical equipment

- IEC 60601-1-2: EMC Requirements for medical electrical equipment (including Radiated Emissions)

4. Test frequency range:

-30 MHZ - 1GHz (for most consumer electronic devices)

-1GHz -6GHz / 18GHz / 40GHz (High-frequency devices, such as Wi-Fi, 5G, radar, etc.)

- Automotive Electronics (CISPR 25) : 150kHz - 2.5GHz

5. Main testing equipment:

- EMI receiver (compliant with CISPR 16-1-1)

- Spectrum analyzer (must meet the requirements of peak, quasi-peak and average value detection)

Antennas (bicone antennas, log-periodic antennas, horn antennas, etc.)

- Turntable & Antenna tower (for omnidirectional radiation testing)

- Anechoic chamber (semi-anechoic chamber SAR or full anechoic chamber FAR)

6. Test Method:

-3m / 10m method (standard test distance, such as CISPR 32, FCC Part 15)

-1m method (commonly used in automotive electronics CISPR 25)

Near-field scanning (PCB-level or device-level pre-testing)